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LA · LAK (₭) · Estimated Dev cost: LAK 400,000/hr How jurisdiction is detected
Netherlands Netherlands · Amsterdam Completed: Apr 21, 2026 21:05 UTC
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Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
C70

Site Health

Score: 70 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Major barriers for users with disabilities — up to 15% of your audience.

Well-optimized for search — your content is discoverable.

Good server performance with room for optimization.

Mostly compliant — a few items need attention.

Missing metadata means poor previews on social media and search.

Heavier than average — reducing page weight saves energy and bandwidth.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Bulma · 346 peers
You 70
·
Avg 74
At average
0 50 100
Better than 6% of Bulma sites See full Bulma benchmark →
Tailwind CSS · 1172 peers
You 70
·
Avg 74
At average
0 50 100
Better than 8% of Tailwind CSS sites See full Tailwind CSS benchmark →

Top Priorities (5)

1

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
2

HSTS header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers
3

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy
4

Page weighs 9.8 MB (8.7 MB transferred)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget
5

2 link(s) with no accessible text

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Link & Button Quality
View fix priority matrix

Fix Priority Matrix

5 findings

Quick Wins

3

High impact, low effort — start here.

Strategic

2

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →
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What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your LCP of 13.6s exceeds Google's 2.5s 'Good' threshold and the 1 performance issue below directly contributes to it. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.
Your LCP is 13.6s — fixing the 1 performance critical could bring it under Google's 2.5s 'Good' threshold.
1 accessibility issue excludes users who rely on assistive technology.

Conversion Barriers

2 critical 6 warning

8 barrier(s) likely increasing bounce by ~30%.

Speed (2)

Page takes 13.6s to load

+12% bounce

Users abandon at ~3s — you're 11.1s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

Page feels frozen for 814ms

+5% bounce

Clicks on the primary CTA are ignored while JavaScript runs

Fix: Break up long tasks; defer non-critical JavaScript to post-hydration

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Content (2)

No Open Graph tags

+2% bounce

Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop

Fix: Add og:title, og:description, og:image, og:url to the page head

No structured data

+2% bounce

No rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices

Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)

Navigation (2)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

2 broken link(s) on the page

+3% bounce

Clicks land on 404s — trust drops and the session often ends

Fix: Fix or remove the broken destinations surfaced on the Content tab

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

LAK 2,000,000 investment → LAK 32,436,858/month returns

Payback period: < 1 month First-year ROI: +19362%

Investment

LAK 2,000,000

5h · 5 findings

Monthly returns

LAK 32,436,858 /mo

~LAK 389,242,291 / year

  • Conversions recovered LAK 32,389,386
  • Bandwidth savings LAK 47,472

Regulatory risk avoided

No applicable regulations in this jurisdiction

Payback period

0 12mo 24mo

LAK 600,000 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

₭2,000,000

5.0 developer hours at ₭400000/hr

Based on Laos rates (₭400000/hr)

Quick wins
₭600,000 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions
₭ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

LAK 47,472 / month at risk

~LAK 569,660 / year if left unfixed

Bandwidth Waste

LAK 47,472 /mo

27296.2 MB/mo × 1739.130 LAK/GB

  • Optimize transfer: save ~2.7 MB per page load
    Saves LAK 47,472/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Unique monthly visitors from your analytics

Purchases, signups, or key actions

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue
Current bounce (est.)
After fixes (est.)
Estimated bounce reduction

Fix 5 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

47
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
75
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.31 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

13.56 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

814 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.39 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

13.61 s

Detailed Report

Audit breakdown by category with detailed findings.

47

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
51.la/image/solution-6.png0.0 ms750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png0.0 ms689.7 KiB
51.la/image/solution-5.png0.0 ms598.8 KiB
51.la/image/solution-1.png0.0 ms547.2 KiB
51.la/gif/h5-banner-v6-VQqRx5UK.gif0.0 ms464.5 KiB
51.la/js/index-8kzxuVEg.js0.0 ms387.4 KiB
51.la/image/h5-zhuce-chatu.png0.0 ms352.4 KiB
51.la/image/solution-7.png0.0 ms339.0 KiB
51.la/image/solution-4.png0.0 ms309.3 KiB
51.la/image/production-yunran.png0.0 ms305.6 KiB
51.la/gif/h5-banner-safe-CbAxJLWD.gif0.0 ms282.3 KiB
51.la/image/community-2-chatu.png0.0 ms271.9 KiB
51.la/image/h5-community-3-chatu.png0.0 ms267.9 KiB
51.la/gif/h5-banner-perf-DlNDW4y3.gif0.0 ms264.0 KiB
51.la/image/community-2-yunran.png0.0 ms263.8 KiB
51.la/gif/h5-banner-app-BM7ZnPup.gif0.0 ms257.7 KiB
51.la/image/solution-2.png0.0 ms256.1 KiB
51.la/image/community-1-chatu.png0.0 ms219.3 KiB
51.la/gif/h5-banner-record-yimXOmEo.gif0.0 ms207.4 KiB
51.la/image/solution-8.png0.0 ms199.5 KiB
51.la/image/solution-3.png0.0 ms147.5 KiB
51.la/image/solution-9.png0.0 ms147.1 KiB
51.la/image/fuwu-bottom-left-bg.png0.0 ms146.3 KiB
51.la/image/community-1-yunran.png0.0 ms104.0 KiB
51.la/image/site-group-bg.png0.0 ms96.9 KiB
cdnstdbs.51.la/static-advertisement/20260417172638-20260417-172542.gif0.0 ms79.9 KiB
51.la/image/evaluate-bg-2.png0.0 ms62.1 KiB
51.la/image/evaluate-bg-1.png0.0 ms58.1 KiB
51.la/css/index-CfDB1C6o.css0.0 ms53.2 KiB
51.la/image/evaluate-icon-3.png0.0 ms52.6 KiB
51.la/image/evaluate-icon-2.png0.0 ms45.3 KiB
51.la/image/evaluate-icon-1.png0.0 ms43.2 KiB
51.la/image/evaluate-bg-3.png0.0 ms37.1 KiB
51.la/png/wechat-BpCdW-3I.png0.0 ms23.4 KiB
51.la/image/wechat.png0.0 ms23.4 KiB
51.la/image/evaluate-name-2.png0.0 ms21.2 KiB
51.la/image/site/site_012.png0.0 ms20.6 KiB
51.la/image/site/site_009.png0.0 ms19.0 KiB
51.la/image/evaluate-name-1.png0.0 ms18.2 KiB
51.la/image/site/site_014.png0.0 ms18.0 KiB
51.la/image/site/site_013.png0.0 ms17.6 KiB
51.la/image/evaluate-name-3.png0.0 ms17.4 KiB
51.la/image/site/site_015.png0.0 ms16.0 KiB
51.la/image/site/site_017.png0.0 ms15.9 KiB
51.la/image/site/site_002.png0.0 ms15.1 KiB
51.la/image/site/site_010.png0.0 ms14.1 KiB
51.la/image/site/site_003.png0.0 ms13.2 KiB
51.la/image/production-1.png0.0 ms12.6 KiB
51.la/image/site/site_018.png0.0 ms11.7 KiB
51.la/js/Home-CKY2M37V.js0.0 ms11.2 KiB
51.la/image/site/site_011.png0.0 ms10.8 KiB
51.la/image/site/site_016.png0.0 ms10.7 KiB
51.la/image/production-2.png0.0 ms9.8 KiB
51.la/image/site/site_007.png0.0 ms9.7 KiB
51.la/image/partner-3.png0.0 ms9.4 KiB
51.la/image/site/site_004.png0.0 ms9.1 KiB
51.la/css/Home-Cjjvo9dx.css0.0 ms8.6 KiB
51.la/png/anquan_logo-DsWQFSvr.png0.0 ms8.6 KiB
51.la/image/production-3.png0.0 ms8.5 KiB
51.la/image/partner-2.png0.0 ms8.5 KiB
51.la/png/v6-icon-DU6mPp9-.png0.0 ms8.0 KiB
51.la/image/site/site_001.png0.0 ms7.4 KiB
51.la/image/site/site_006.gif0.0 ms7.4 KiB
51.la/image/site/site_008.png0.0 ms6.6 KiB
51.la/image/site/site_005.png0.0 ms5.2 KiB
51.la/image/partner-6.png0.0 ms4.6 KiB
51.la/font/iconfont.woff20.0 ms4.4 KiB
51.la/image/partner-4.png0.0 ms4.3 KiB
51.la/image/partner-5.png0.0 ms3.9 KiB
51.la/image/partner-1.png0.0 ms3.2 KiB
cdnstdbs.51.la/static-advertisement/20241127151536-test-ad.png0.0 ms1.9 KiB
51.la/image/community-2-icon.png0.0 ms1.9 KiB
51.la/image/community-1-icon.png0.0 ms1.6 KiB
51.la/image/community-3-icon.png0.0 ms1.3 KiB
51.la/image/site-more.png0.0 ms420 B
51.la/image/computer-icon.png0.0 ms340 B
sdk.51.la/icon/4-1.png1296000.0 s1.3 KiB

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:113.109 source:map[column:23969 line:97 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:11.479 source:map[column:44479 line:21 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.232 source:map[column:21208 line:23 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:113.109 source:map[column:24031 line:96 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:2.475 source:map[type:text value:[unattributed]]] map[reflowTime:76.73 source:map[column:68285 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:1.137 source:map[column:68140 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
视频 - 观众洞察： 通过用户画像、用户行为分析等，可以帮助视频服务商了解观众的需求和喜好，以便于调整和优化他们的内容策略。根据用户的观看历史和偏好，提供个性… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-6.png749.1 KiB658.2 KiB
300 万+ 网站开发者的选择 2000 万+ 全球网站提供数据统计服务 1 个账号 通用51LA旗下所有服务 div > section.section > div.section__service-content > div.section__service-content-wrap
51.la/image/fuwu-bottom-right-diqiu.png688.8 KiB572.4 KiB
阅读 - 内容推荐： 根据用户的阅读历史和偏好，提供个性化的内容推荐，提升用户的阅读体验。 - 用户洞察： 通过用户画像、用户行为分析等，帮助出版商了解读者的… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-5.png597.9 KiB521.7 KiB
新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和服务推广，支持数据驱动的决策。 - 数据… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-1.png546.4 KiB478.5 KiB
免费、易用、专业的 网站数据统计与营销分析平台 欢迎加入51.LA，开启您的统计之旅 立即注册 main.container > div.home > div > div.register-now
51.la/image/h5-zhuce-chatu.png351.9 KiB276.7 KiB
电商 - 用户洞察： 通过用户画像、用户行为分析等，帮助商家了解用户的消费习惯、喜好、购买力等信息，以便于更好地进行精准营销。 - 流量统计和分析及数据管理：… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-4.png308.8 KiB274.8 KiB
政务 - 政务服务平台： 帮助政府机构建设一站式政务服务门户，进行站点数据统计和分析，优化政务门户业务流，方便市民办事。 - 数据可视化： 帮助政府部门将大量… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-7.png338.5 KiB264.8 KiB
V5 网站统计 专注于网站统计16年，助站长们更高效经营网站 实时监测访问流量 流量趋势分析 稳定性接口 洞察分析用户行为 section.section > div.section__production-content > div.section__production-content-list > div.section__production-content-item
51.la/image/production-yunran.png305.1 KiB232.0 KiB
通用互联网 - 数据统计与分析系统： 51.LA提供了全面的统计分析工具，可以帮助企业实时监测网站、APP、小程序的访问量、活跃用户数、页面浏览量、停留时间等… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-2.png255.7 KiB221.7 KiB
帮助交流 在这里，找到问题答案 div > section.section > div.section > div.section
51.la/image/community-2-yunran.png263.4 KiB214.7 KiB
使用文档 产品功能和实操介绍，快速上手 div > section.section > div.section > div.section
51.la/image/h5-community-3-chatu.png267.4 KiB213.4 KiB
帮助交流 在这里，找到问题答案 div > section.section > div.section > div.section
51.la/image/community-2-chatu.png271.4 KiB176.2 KiB
办公 - 办公站点数据监控： 通过埋点站点行为事件，监控用户站点使用情况：使用路径、时长等，追踪用户动线，提高团队协作效率。 - 决策分析： 数据分析工具可以… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-8.png199.2 KiB165.2 KiB
div > div.h5 > div.section > ::before div > div.h5 > div.section > ::before
51.la/gif/h5-banner-app-BM7ZnPup.gif257.1 KiB146.5 KiB
教育 - 学员数据管理： 帮助学校或培训机构管理学员的数据进行管理等。 - 教育数据分析： 数据分析工具可以帮助学校或培训机构分析学员的学习数据，了解学员的行… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-3.png147.2 KiB123.6 KiB
汽车 - 汽车智能化： 帮助汽车制造商打造智能网联汽车，通过实时采集车辆数据，实现远程诊断、故障预警等功能，提升驾驶体验。 - 智能出行： 帮助交通管理部门实… section.section > div.el-carousel > div.el-carousel__container > div.el-carousel__item
51.la/image/solution-9.png146.8 KiB112.7 KiB
div > div.h5 > div.section > ::before div > div.h5 > div.section > ::before
51.la/gif/h5-banner-record-yimXOmEo.gif207.0 KiB111.8 KiB
产品动态 随时掌握51.LA最新资讯 div > section.section > div.section > div.section
51.la/image/community-1-chatu.png219.0 KiB110.6 KiB
300 万+ 网站开发者的选择 2000 万+ 全球网站提供数据统计服务 1 个账号 通用51LA旗下所有服务 div > section.section > div.section__service-content > div.section__service-content-wrap
51.la/image/fuwu-bottom-left-bg.png146.0 KiB104.1 KiB
产品动态 随时掌握51.LA最新资讯 div > section.section > div.section > div.section
51.la/image/community-1-yunran.png103.7 KiB90.0 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png52.4 KiB43.4 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png45.1 KiB36.0 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png43.1 KiB34.0 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-2.png61.9 KiB27.4 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-1.png57.9 KiB23.3 KiB
四川大学商学院 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_012.png20.4 KiB19.6 KiB
微信公众号 div.footbar-central > div > div.footbar-central-col > img.qrcode-img
51.la/png/wechat-BpCdW-3I.png23.2 KiB19.2 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png21.1 KiB19.1 KiB
河北慈善网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_009.png18.8 KiB18.2 KiB
襄阳论坛 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_014.png17.8 KiB17.0 KiB
飘域家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_013.png17.4 KiB16.9 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png18.1 KiB16.2 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png17.2 KiB15.2 KiB
宠略 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_015.png15.8 KiB15.0 KiB
买米网 div.site-container > div.site-more > div.itemPC > img
51.la/image/site/site_017.png15.7 KiB14.9 KiB
齐鲁晚报 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_002.png14.9 KiB14.2 KiB
仙漫网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_010.png13.9 KiB13.3 KiB
站长之家 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_003.png13.1 KiB12.5 KiB
兔客 div.site-container > div.site-more > div.itemPC > img
51.la/image/site/site_018.png11.5 KiB10.8 KiB
黄河新闻网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_011.png10.6 KiB10.2 KiB
爱游网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_016.png10.5 KiB10.0 KiB
芦虎 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_007.png9.6 KiB8.7 KiB
比特币家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_004.png9.0 KiB8.2 KiB
安全认证 div > div.footbar-central-col > a.anquan-link > img
51.la/png/anquan_logo-DsWQFSvr.png8.4 KiB7.7 KiB
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png7.2 KiB6.6 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-3.png9.2 KiB6.4 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-2.png8.4 KiB6.2 KiB
LOOKAE div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_008.png6.5 KiB5.8 KiB
苏州都市网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_006.gif7.2 KiB5.6 KiB
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png5.0 KiB4.3 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:34.009 label:Time to first byte subpart:timeToFirstByte] map[duration:4601.796 label:Element render delay subpart:elementRenderDelay]]
lhId: page-47-DIV
nodeLabel: App移动统计 免费、易用、专业的移动数据统计与营销分析平台，实现精细化运营，全面提升业务增长效能 了解更多
path: 1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,2,DIV,1,DIV,1,DIV,1,DIV,0,DIV
selector: div.el-carousel__item > div > div.h5 > div.section
snippet: <div data-v-55f70532="" class="section section__banner-item section__banner-item-perf app-bg-h5">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
51.la/css/index-CfDB1C6o.css53.2 KiB301 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
51.la/font/iconfont.woff210 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 50.4 KiB
URLTransfer SizeEst Savings
51.la/css/index-CfDB1C6o.css53.1 KiB50.4 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 1.5 s 281.4 KiB
URLTransfer SizeEst Savings
51.la/js/index-8kzxuVEg.js386.6 KiB281.4 KiB

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Other1.6 s
Style & Layout1.1 s
Script Evaluation1.0 s
Rendering368 ms
Parse HTML & CSS61 ms
Garbage Collection17 ms
Script Parsing & Compilation11 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Internal error.Not actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
51.la/image/solution-6.png750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png689.7 KiB
51.la/image/solution-5.png598.8 KiB
51.la/image/solution-1.png547.2 KiB
51.la/gif/h5-banner-v6-VQqRx5UK.gif464.5 KiB
51.la/js/index-8kzxuVEg.js387.4 KiB
51.la/image/h5-zhuce-chatu.png352.4 KiB
51.la/image/solution-7.png339.0 KiB
51.la/image/solution-4.png309.3 KiB
51.la/image/production-yunran.png305.6 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png
苏州都市网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_006.gif
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png
四川大学商学院 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_012.png
比特币家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_004.png
芦虎 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_007.png
买米网 div.site-container > div.site-more > div.itemPC > img
51.la/image/site/site_017.png
河北慈善网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_009.png
齐鲁晚报 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_002.png
站长之家 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_003.png
襄阳论坛 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_014.png
宠略 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_015.png
LOOKAE div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_008.png
兔客 div.site-container > div.site-more > div.itemPC > img
51.la/image/site/site_018.png
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png
飘域家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_013.png
仙漫网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_010.png
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png
黄河新闻网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_011.png
爱游网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_016.png
div.header-content > div.banner-text > div > img.mb-18 div.header-content > div.banner-text > div > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Document request latency
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 1.0 s
●Avoid long main-thread tasks 6 long tasks found
●Avoid non-composited animations 2 animated elements found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 510 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
●Initial server response time was short Root document took 0 ms
○INP breakdown
○LCP request discovery
○User Timing marks and measures
○Avoid large layout shifts
84

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
咨询方案 div > section.section > div.btn > button
立即注册 div.register-now > div.h5-inner > a > button.register-btn
Copyright © 2002-2026 广州有啦网络科技有限公司 div#footbar > div.footbar > div.footbar-copyright > div

These are opportunities to improve the legibility of your content.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
免费、易用、专业的网站数据统计与营销分析平台 div.section > div.header-content > div.banner-text > h4.index-animate

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
幻灯片切换至索引 3 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 4 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 5 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
●Definition list items are wrapped in `<dl>` elements
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Document has a main landmark.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[role]`s have all required `[aria-*]` attributes
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○`[role]` values are valid
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
92

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png135 x 256 (0.53)256 x 256 (1.00)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png85 x 106 (0.80)206 x 106 (1.94)
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png60 x 70 (0.86)126 x 70 (1.80)
div.section > div.header-content > div.banner-text > img.mb-18 div.section > div.header-content > div.banner-text > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png68 x 47 (1.45)134 x 47 (2.85)
div.header-content > div.banner-text > div > img.mb-18 div.header-content > div.banner-text > div > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png68 x 26 (2.62)134 x 47 (2.85)

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
51.la/api/sso/lookup
Failed to load resource: the server responded with a status of 401 ()

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
51.la/js/index-8kzxuVEg.js51.la/js/index-8kzxuVEg.js.map
51.la/js/Home-CKY2M37V.js51.la/js/Home-CKY2M37V.js.map
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
○Redirects HTTP traffic to HTTPS
○Detected JavaScript libraries
75

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
登录 header.h5 > div.h5-banner > div > a
注册 header.h5 > div.h5-banner > div > a
联系我们 div#app > div.fixed-tool > div.pc > a.side-tag

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #ContentError
1<!DOCTYPE html>Syntax not understood
2<html lang="zh-CN">Syntax not understood
3 <head>Syntax not understood
4 <meta charset="UTF-8" />Syntax not understood
5 <link rel="icon" type="image/x-icon" href="/favicon.ico" />Syntax not understood
6 <meta name="viewport" content="width=device-width, initial-scale=1.0" />Syntax not understood
7 <meta name="description" content="51LA - 领先的数据统计服务商" />Syntax not understood
8 <title>51LA - 领先的数据统计服务商</title>Syntax not understood
9 <script type="module" crossorigin src="/js/index-8kzxuVEg.js"></script>Syntax not understood
10 <link rel="stylesheet" crossorigin href="/css/index-CfDB1C6o.css">Syntax not understood
11 </head>Syntax not understood
12 <body>Syntax not understood
13 <div id="app"></div>Syntax not understood
14 </body>Syntax not understood
15</html>Syntax not understood

To appear in search results, crawlers need access to your app.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
75
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

922 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.73 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

85 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.409

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.34 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.74 s

Detailed Report

Audit breakdown by category with detailed findings.

63

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
51.la/image/solution-bg.png0.0 ms1.7 MiB
51.la/image/solution-6.png0.0 ms750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png0.0 ms689.7 KiB
51.la/image/community-3-chatu.png0.0 ms678.0 KiB
51.la/image/solution-5.png0.0 ms598.8 KiB
51.la/image/solution-1.png0.0 ms547.2 KiB
51.la/gif/banner-safe-CdaMFx94.gif0.0 ms496.5 KiB
51.la/gif/banner-v6-DJZ15IgC.gif0.0 ms433.9 KiB
51.la/js/index-8kzxuVEg.js0.0 ms387.4 KiB
51.la/image/zhuce-left.png0.0 ms345.5 KiB
51.la/image/solution-7.png0.0 ms339.0 KiB
51.la/gif/banner-perf-CpuidH0T.gif0.0 ms322.6 KiB
51.la/image/solution-4.png0.0 ms309.3 KiB
51.la/gif/banner-app-CKOi1sY_.gif0.0 ms306.6 KiB
51.la/image/production-yunran.png0.0 ms305.6 KiB
51.la/image/zhuce-right.png0.0 ms300.7 KiB
51.la/image/community-2-chatu.png0.0 ms271.9 KiB
51.la/image/community-2-yunran.png0.0 ms263.8 KiB
51.la/image/solution-2.png0.0 ms256.1 KiB
51.la/image/community-1-chatu.png0.0 ms219.3 KiB
51.la/gif/banner-record-CFc8_6oW.gif0.0 ms205.2 KiB
51.la/image/solution-yunran.png0.0 ms202.1 KiB
51.la/image/solution-8.png0.0 ms199.5 KiB
51.la/image/fuwu-yunran.png0.0 ms179.9 KiB
51.la/image/solution-3.png0.0 ms147.5 KiB
51.la/image/solution-9.png0.0 ms147.1 KiB
51.la/image/fuwu-bottom-left-bg.png0.0 ms146.3 KiB
51.la/image/community-1-yunran.png0.0 ms104.0 KiB
51.la/image/site-group-bg.png0.0 ms96.9 KiB
51.la/image/ad-more-bg.png0.0 ms92.8 KiB
cdnstdbs.51.la/static-advertisement/20260417172638-20260417-172542.gif0.0 ms79.9 KiB
51.la/image/evaluate-bg-2.png0.0 ms62.1 KiB
51.la/image/evaluate-bg-1.png0.0 ms58.1 KiB
51.la/css/index-CfDB1C6o.css0.0 ms53.2 KiB
51.la/image/evaluate-icon-3.png0.0 ms52.6 KiB
51.la/image/evaluate-icon-2.png0.0 ms45.3 KiB
51.la/image/evaluate-icon-1.png0.0 ms43.3 KiB
51.la/image/evaluate-bg-3.png0.0 ms37.1 KiB
51.la/png/wechat-BpCdW-3I.png0.0 ms23.4 KiB
51.la/image/wechat.png0.0 ms23.4 KiB
51.la/image/evaluate-name-2.png0.0 ms21.2 KiB
51.la/image/site/site_012.png0.0 ms20.6 KiB
51.la/image/site/site_009.png0.0 ms19.0 KiB
51.la/image/evaluate-name-1.png0.0 ms18.3 KiB
51.la/image/site/site_014.png0.0 ms18.0 KiB
51.la/image/site/site_013.png0.0 ms17.6 KiB
51.la/image/evaluate-name-3.png0.0 ms17.4 KiB
51.la/image/ad-tiao.png0.0 ms16.6 KiB
51.la/image/site/site_015.png0.0 ms16.0 KiB
51.la/image/site/site_017.png0.0 ms15.9 KiB
51.la/image/site/site_002.png0.0 ms15.1 KiB
51.la/image/site/site_010.png0.0 ms14.1 KiB
51.la/image/site/site_003.png0.0 ms13.2 KiB
51.la/image/production-1.png0.0 ms12.6 KiB
51.la/image/site/site_018.png0.0 ms11.7 KiB
51.la/js/Home-CKY2M37V.js0.0 ms11.2 KiB
51.la/image/site/site_011.png0.0 ms10.8 KiB
51.la/image/site/site_016.png0.0 ms10.7 KiB
51.la/image/fuwu-left-bg.png0.0 ms10.4 KiB
51.la/image/production-2.png0.0 ms9.8 KiB
51.la/image/site/site_007.png0.0 ms9.7 KiB
51.la/image/partner-3.png0.0 ms9.4 KiB
51.la/image/site/site_004.png0.0 ms9.1 KiB
51.la/css/Home-Cjjvo9dx.css0.0 ms8.6 KiB
51.la/png/anquan_logo-DsWQFSvr.png0.0 ms8.6 KiB
51.la/image/production-3.png0.0 ms8.5 KiB
51.la/image/partner-2.png0.0 ms8.5 KiB
51.la/png/v6-icon-DU6mPp9-.png0.0 ms8.0 KiB
51.la/image/footer-bg.png0.0 ms7.4 KiB
51.la/image/site/site_001.png0.0 ms7.4 KiB
51.la/image/site/site_006.gif0.0 ms7.4 KiB
51.la/image/site/site_008.png0.0 ms6.6 KiB
51.la/image/site/site_005.png0.0 ms5.2 KiB
51.la/image/invite.png0.0 ms5.0 KiB
51.la/image/partner-6.png0.0 ms4.6 KiB
51.la/font/iconfont.woff20.0 ms4.4 KiB
51.la/image/partner-4.png0.0 ms4.3 KiB
51.la/image/partner-5.png0.0 ms3.9 KiB
51.la/image/partner-1.png0.0 ms3.2 KiB
cdnstdbs.51.la/static-advertisement/20241127151536-test-ad.png0.0 ms1.9 KiB
51.la/image/community-2-icon.png0.0 ms1.9 KiB
51.la/image/community-1-icon.png0.0 ms1.6 KiB
51.la/image/fuwu-icon-7.png0.0 ms1.6 KiB
51.la/image/community-3-icon.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-5.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-3.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-4.png0.0 ms1.3 KiB
51.la/image/fuwu-icon-2.png0.0 ms1.2 KiB
51.la/image/fuwu-icon-1.png0.0 ms1.1 KiB
51.la/image/fuwu-icon-6.png0.0 ms1.1 KiB
51.la/image/site-more.png0.0 ms421 B
sdk.51.la/icon/4-1.png1296000.0 s1.3 KiB

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.40871399999999997] map[node:map[boundingRect:map[bottom:7019 height:464 left:0 right:1350 top:6555 width:1350] lhId:page-34-DIV nodeLabel:产品 51.la 网站统计V6 51.la 网站统计 51.la 灵雀应用监控 用户中心 最新活动 文档中心 建议与反馈 关于我们 公司简介 注册用户协议 隐… path:1,HTML,1,BODY,0,DIV,0,DIV,2,DIV selector:body > div#app > div#app > div#footbar snippet:<div data-v-bc459d7c="" id="footbar" class="" style=""> type:node] score:0.4] map[node:map[boundingRect:map[bottom:2270 height:914 left:0 right:1350 top:1356 width:1350] lhId:page-39-DIV nodeLabel:与用户共建知识社区 更新日志、常见问题、实战干货、学习成长、分享、共建 产品动态 随时掌握51.LA最新资讯 了解更多 帮助交流 在这里，找到问题答案 问… path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,3,DIV selector:div#app > main.container > div.home > div snippet:<div data-v-6df51acf="" data-v-859a417d=""> type:node] score:0.007837] map[node:map[boundingRect:map[bottom:60 height:60 left:149 right:620 top:0 width:471] lhId:page-33-UL nodeLabel:首页 产品 资讯 文档中心 查询工具 关于我们 path:1,HTML,1,BODY,0,DIV,0,DIV,0,DIV,0,HEADER,1,DIV,0,DIV,0,DIV,1,UL selector:div.inner-bar > div.inner-wrap > div.header-nav-content__left > ul.nav-menu snippet:<ul data-v-b33160fd="" class="nav-menu"> type:node] score:0.000876 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://51.la/font/iconfont.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:780 height:6 left:637 right:652 top:774 width:15] lhId:page-35-LI nodeLabel:幻灯片切换至索引 2 path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,3,UL,1,LI selector:div.section > div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator snippet:<li class="el-carousel__indicator el-carousel__indicator--horizontal"> type:node] score:1e-06]]
headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:0.022884] map[node:map[boundingRect:map[bottom:1281 height:221 left:0 right:1350 top:1060 width:1350] lhId:page-40-SECTION nodeLabel:本站广告由赞助商提供，请谨慎鉴别，风险自担 path:1,HTML,1,BODY,0,DIV,0,DIV,1,MAIN,0,DIV,2,SECTION selector:div#app > main.container > div.home > section.section snippet:<section data-v-2b659da4="" data-v-859a417d="" class="section section__ads pc" style="display: none;"> type:node] score:0.022884]]

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:37.897 source:map[column:23969 line:97 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:60.708 source:map[column:24004 line:96 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.228 source:map[column:21208 line:23 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:69.818 source:map[column:68285 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]] map[reflowTime:0.667 source:map[column:68140 line:52 type:source-location url:https://51.la/js/index-8kzxuVEg.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
丰富的解决方案，覆盖千行百业 咨询方案 新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和… main.container > div.home > div > section.section
51.la/image/solution-bg.png1.7 MiB976.1 KiB
视频 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-6.png749.1 KiB658.2 KiB
实时访客流量监测 用户行为分析 渠道追踪分析 全量数据开放API接口 数据报表分享 区块链项目统计 适用于Web 3.0 section.section > div.section__service-content > div > div.section__service-content-bottom
51.la/image/fuwu-bottom-right-diqiu.png688.8 KiB572.4 KiB
阅读 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-5.png597.9 KiB521.7 KiB
新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和服务推广，支持数据驱动的决策。 - 数据… section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-1.png546.4 KiB478.5 KiB
使用文档 产品功能和实操介绍，快速上手 了解更多 div > section.section > div.section > div.section
51.la/image/community-3-chatu.png677.1 KiB436.4 KiB
电商 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-4.png308.8 KiB274.8 KiB
政务 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-7.png338.5 KiB264.8 KiB
灵雀 应用性能监控 监测与分析平台，助力用户增长 异常分析 实时预警 性能监测 卡顿 资源雷达 了解更多 section.section > div.section__production-content > div.section__production-content-list > div.section__production-content-item
51.la/image/production-yunran.png305.1 KiB232.0 KiB
通用互联网 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-2.png255.7 KiB221.7 KiB
帮助交流 在这里，找到问题答案 问题反馈 div > section.section > div.section > div.section
51.la/image/community-2-yunran.png263.4 KiB214.7 KiB
App移动统计 免费、易用、专业的移动数据统计与营销分析平台，实现精细化运营，全面提升业务增长效能 了解更多 div.el-carousel__item > div > div.pc > div.section
51.la/gif/banner-app-CKOi1sY_.gif306.1 KiB180.6 KiB
帮助交流 在这里，找到问题答案 问题反馈 div > section.section > div.section > div.section
51.la/image/community-2-chatu.png271.4 KiB176.2 KiB
办公 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-8.png199.2 KiB165.2 KiB
丰富的解决方案，覆盖千行百业 咨询方案 新零售 - 精准营销: 通过用户画像、用户行为分析等，帮助零售商了解消费者的购物习惯和喜好，以便于进行精准的产品推荐和… main.container > div.home > div > section.section
51.la/image/solution-yunran.png201.7 KiB157.4 KiB
2000 万+ 全球网站提供数据统计服务 section.section > div.section__service-content > div.section__service-content-top > div.top-item
51.la/image/fuwu-yunran.png179.6 KiB146.5 KiB
教育 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-3.png147.2 KiB123.6 KiB
汽车 section.section > div.section__solution-content > div.section__solution-collapse > div.cpllapse-item
51.la/image/solution-9.png146.8 KiB112.7 KiB
全新「屏幕录制」功能上线 带您直观还原用户访问网站的全过程，从鼠标移动到屏幕变化，定位问题根源，让您的网站更懂用户，轻松赢得访客的青睐！ 了解更多 div.el-carousel__item > div > div.pc > div.section
51.la/gif/banner-record-CFc8_6oW.gif204.8 KiB110.6 KiB
产品动态 随时掌握51.LA最新资讯 了解更多 div > section.section > div.section > div.section
51.la/image/community-1-chatu.png219.0 KiB110.6 KiB
div.section__service-content > div > div.section__service-content-bottom > ::after div.section__service-content > div > div.section__service-content-bottom > ::after
51.la/image/fuwu-bottom-left-bg.png146.0 KiB104.1 KiB
产品动态 随时掌握51.LA最新资讯 了解更多 div > section.section > div.section > div.section
51.la/image/community-1-yunran.png103.7 KiB90.0 KiB
查看更多 div.home > div.section > div.section__notice-content > a.section__notice-content-item
51.la/image/ad-more-bg.png92.6 KiB62.9 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png52.4 KiB49.5 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png45.1 KiB42.1 KiB
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png43.1 KiB40.1 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-2.png61.9 KiB27.4 KiB
51la博客主用户评价 section.section > div.section__evaluate-content > div.section > div.item-left
51.la/image/evaluate-bg-1.png57.9 KiB23.3 KiB
微信公众号 div.section-wrap > div.footbar-central > div.footbar-central-col > img.qrcode-img
51.la/png/wechat-BpCdW-3I.png23.2 KiB21.6 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png21.1 KiB20.4 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png18.1 KiB17.5 KiB
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png17.2 KiB16.6 KiB
安全认证 div.pc > div.footbar-copyright > a > img
51.la/png/anquan_logo-DsWQFSvr.png8.4 KiB8.4 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-3.png9.2 KiB6.4 KiB
div.section__partner-content > div.section__partner-content-wrap > div.item > div div.section__partner-content > div.section__partner-content-wrap > div.item > div
51.la/image/partner-2.png8.4 KiB6.2 KiB
邀请福利 div#app > div.fixed-tool > div.pc > a.tool-item
51.la/image/invite.png4.9 KiB4.3 KiB

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
51.la/css/index-CfDB1C6o.css53.2 KiB81 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
51.la/font/iconfont.woff210 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
产品 51.la 网站统计V6 51.la 网站统计 51.la 灵雀应用监控 用户中心 最新活动 文档中心 建议与反馈 关于我们 公司简介 注册用户协议 隐… body > div#app > div#app > div#footbar
0.400
本站广告由赞助商提供，请谨慎鉴别，风险自担 div#app > main.container > div.home > section.section
0.023
与用户共建知识社区 更新日志、常见问题、实战干货、学习成长、分享、共建 产品动态 随时掌握51.LA最新资讯 了解更多 帮助交流 在这里，找到问题答案 问… div#app > main.container > div.home > div
0.008
首页 产品 资讯 文档中心 查询工具 关于我们 div.inner-bar > div.inner-wrap > div.header-nav-content__left > ul.nav-menu
0.001
幻灯片切换至索引 2 div.section > div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator
0.000

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 50.5 KiB
URLTransfer SizeEst Savings
51.la/css/index-CfDB1C6o.css53.1 KiB50.5 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 240 ms 281.4 KiB
URLTransfer SizeEst Savings
51.la/js/index-8kzxuVEg.js386.6 KiB281.4 KiB

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Internal error.Not actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
51.la/image/solution-bg.png1.7 MiB
51.la/image/solution-6.png750.1 KiB
51.la/image/fuwu-bottom-right-diqiu.png689.7 KiB
51.la/image/community-3-chatu.png678.0 KiB
51.la/image/solution-5.png598.8 KiB
51.la/image/solution-1.png547.2 KiB
51.la/gif/banner-safe-CdaMFx94.gif496.5 KiB
51.la/gif/banner-v6-DJZ15IgC.gif433.9 KiB
51.la/js/index-8kzxuVEg.js387.4 KiB
51.la/image/zhuce-left.png345.5 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png
苏州都市网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_006.gif
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png
四川大学商学院 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_012.png
比特币家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_004.png
芦虎 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_007.png
河北慈善网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_009.png
齐鲁晚报 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_002.png
站长之家 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_003.png
襄阳论坛 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_014.png
宠略 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_015.png
LOOKAE div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_008.png
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png
酷家乐 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_001.png
飘域家园 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_013.png
仙漫网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_010.png
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png
黄河新闻网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_011.png
爱游网 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_016.png
div.section > div.header-content > div.banner-text > img.mb-18 div.section > div.header-content > div.banner-text > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png
主题镇 div.site-container > div.range-container > div.itemPC > img
51.la/image/site/site_005.png
51LA div.pc > div.footbar-copyright > a > img
sdk.51.la/icon/4-1.png

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Max Potential First Input Delay 100 ms
●Document request latency
●Optimize DOM size
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●JavaScript execution time 0.3 s
●Minimizes main-thread work 1.0 s
●Avoid long main-thread tasks 3 long tasks found
●Avoid non-composited animations 2 animated elements found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 620 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid multiple page redirects
●Initial server response time was short Root document took 0 ms
○INP breakdown
○LCP request discovery
○User Timing marks and measures
78

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

ARIA roles must have valid values in order to perform their intended accessibility functions. Learn more about valid ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.home > section.section > div.section > div.section-flex div.home > section.section > div.section > div.section-flex

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
了解更多 div.banner-text > div.index-animate > button.el-button > span
咨询方案 div > section.section > div.btn > button
咨询客服 div.content > div.info > div.group-btn > button
立即注册 div.container1 > div.register-inner > a > button.register-btn
Copyright © 2002-2026 广州有啦网络科技有限公司 div.footbar > div.pc > div.footbar-copyright > span

These are opportunities to improve the legibility of your content.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.inner-bar > div.inner-wrap > div.header-nav-content__left > a.router-link-active div.inner-bar > div.inner-wrap > div.header-nav-content__left > a.router-link-active
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
section.section > div.section > div.section-flex > a.da-item section.section > div.section > div.section-flex > a.da-item
div#app > div.fixed-tool > div.pc > a.tool-item div#app > div.fixed-tool > div.pc > a.tool-item

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
幻灯片切换至索引 3 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 4 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button
幻灯片切换至索引 5 div.el-carousel > ul.el-carousel__indicators > li.el-carousel__indicator > button.el-carousel__button

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
●Definition list items are wrapped in `<dl>` elements
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○No element has a `[tabindex]` value greater than 0
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
92

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-1.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-2.png135 x 256 (0.53)256 x 256 (1.00)
51la博客主用户评价 div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-icon-3.png135 x 256 (0.53)256 x 256 (1.00)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-2.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-3.png95 x 106 (0.90)242 x 106 (2.28)
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
51.la/image/evaluate-name-1.png85 x 106 (0.80)206 x 106 (1.94)
div.header-content > div.banner-text > h2.mb-18 > img div.header-content > div.banner-text > h2.mb-18 > img
51.la/png/v6-icon-DU6mPp9-.png45 x 70 (0.64)126 x 70 (1.80)
div.header-content > div.banner-text > div > img.mb-18 div.header-content > div.banner-text > div > img.mb-18
51.la/png/anquan_logo-DsWQFSvr.png68 x 47 (1.45)134 x 47 (2.85)

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
51.la/api/sso/lookup
Failed to load resource: the server responded with a status of 401 ()
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Detected JavaScript libraries
75

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
登录 header.h5 > div.h5-banner > div > a
注册 header.h5 > div.h5-banner > div > a
联系我们 div#app > div.fixed-tool > div.pc > a.side-tag

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Line #ContentError
1<!DOCTYPE html>Syntax not understood
2<html lang="zh-CN">Syntax not understood
3 <head>Syntax not understood
4 <meta charset="UTF-8" />Syntax not understood
5 <link rel="icon" type="image/x-icon" href="/favicon.ico" />Syntax not understood
6 <meta name="viewport" content="width=device-width, initial-scale=1.0" />Syntax not understood
7 <meta name="description" content="51LA - 领先的数据统计服务商" />Syntax not understood
8 <title>51LA - 领先的数据统计服务商</title>Syntax not understood
9 <script type="module" crossorigin src="/js/index-8kzxuVEg.js"></script>Syntax not understood
10 <link rel="stylesheet" crossorigin href="/css/index-CfDB1C6o.css">Syntax not understood
11 </head>Syntax not understood
12 <body>Syntax not understood
13 <div id="app"></div>Syntax not understood
14 </body>Syntax not understood
15</html>Syntax not understood

To appear in search results, crawlers need access to your app.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section > div.section-flex > a.da-item > img div.section > div.section-flex > a.da-item > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img
div.section__evaluate-content > div.section > div.item-left > img div.section__evaluate-content > div.section > div.item-left > img

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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