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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
72
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
72
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

4.59 s

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

4.59 s

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

74 ms

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

0.002

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

4.69 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.

6.64 s

Page Load Progression

514 ms
1.0 s
1.5 s
2.1 s
2.6 s
3.1 s
3.6 s
4.1 s
Checks
17
9 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (618.2 KiB of 618.3 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
46 images, 0 KB saveable
REVIEW
46 images, 0 KB saveable
Warning::
https://www.cnblogs.com/images/aggsite/pulldown-bo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/logo.svg?v=2SMrXdIv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
46 images 350 KB
0 oversized -0 KB
42 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1920ms total JS execution
REVIEW
1920ms total JS execution
Warning::
https://www.cnblogs.com/: 849ms CPU time
Warning::
Unattributable: 491ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-M95P...: 226ms CPU time
Info::
https://assets.cnblogs.com/scripts/jquery-3.3.1.mi...: 160ms CPU time
Info::
https://cdn-www.cnblogs.com/js/aggsite-new.min.js?...: 109ms CPU time
Warning::
Third-party scripts: 1920ms (100% of total)

Main Thread Breakdown

Other 34% Style & Layout 27% Script Evaluation 25% Rendering 8% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.cnblogs.com/849ms10ms2ms3rd
Unattributable491ms7ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-M95P3TTWJZ226ms185ms37ms3rd
https://assets.cnblogs.com/scripts/jquery-3.3.1.min.js160ms103ms7ms3rd
https://cdn-www.cnblogs.com/js/aggsite-new.min.js?v=IgggDUGX9TUGTatF8b3WO8A4-JU6SvvkrE0nzPACj4c109ms103ms5ms3rd
https://hm.baidu.com/hm.js?866c9be12d4a814454792b1fd0fed29585ms70ms3ms3rd
B
JS Bundles
7 scripts, 64 KB unused
REVIEW
7 scripts, 64 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-M95P...: 64 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 64 KB
64 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-M95P3TTWJZ157 KB64 KB (41%)✓3rd
https://assets.cnblogs.com/scripts/jquery-3.3.1.min.js30 KB—✓3rd
https://cdn-www.cnblogs.com/js/aggsite-new.min.js?v=IgggDUGX9TUGTatF8b3WO8A4-JU6SvvkrE0nzPACj4c15 KB—✓3rd
https://cdn-www.cnblogs.com/ng/polyfills-jq6heycx.js0 KB—✓3rd
https://cdn-www.cnblogs.com/ng/main-ia2uqgxu.js0 KB—✓3rd
https://hm.baidu.com/hm.js?866c9be12d4a814454792b1fd0fed29512 KB—✓3rd
https://res.wx.qq.com/open/js/jweixin-1.6.0.js?_=177680416654713 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
618 KB transferred, 68 requests
PASS
618 KB transferred, 68 requests
Info::
Page weighs 1.1 MB (618 KB transferred)
Info::
68 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
618 KB / 2.4 MB budget
618 KB transferred
68 requests
0.13 g CO2 per page load
Images 349.8 KiB 57%
JavaScript 227.4 KiB 37%
HTML 16.3 KiB 3%
CSS 9.9 KiB 2%
Other 7.4 KiB 1%
Other 7.1 KiB 1%
Other 549 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
68 resources · 618 KB · 64 KB savings available
PASS
68 resources · 618 KB · 64 KB savings available
Info::
Within 1MB page-weight target
Got: 618 KB
Info::
~64 KB of savings available
Warning::
67 third-party resources (100% of weight)
68 resources · 618.3 KiB · 67 third-party Within 1MB page-weight target
Image 58% · 356.7 KiB
JavaScript 37% · 227.4 KiB
Document 4% · 22.5 KiB
CSS 2% · 9.9 KiB
Other 0% · 1.8 KiB

~64.5 KiB of savings available

Remove unused JavaScript: 64.5 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
68 requests over 5407ms
INFO
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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1920ms · 230KB · ¥95/mo
www.cnblogs.com
Other
Costly
Execution 849ms
Transfer 16 KB
Monthly Cost ¥42/mo
Unattributable
Other
Costly
Execution 491ms
Transfer 0 KB
Monthly Cost ¥24/mo
Google Tag Manager
Tag Manager
Costly
Execution 226ms
Transfer 157 KB
Unused 41%
Monthly Cost ¥11/mo
assets.cnblogs.com
Other
Optional
Execution 160ms
Transfer 30 KB
Monthly Cost ¥8/mo
cdn-www.cnblogs.com
Other
Optional
Execution 109ms
Transfer 15 KB
Monthly Cost ¥5/mo
hm.baidu.com
Other
Optional
Execution 85ms
Transfer 12 KB
Monthly Cost ¥4/mo

These scripts may cost more than they're worth

  • www.cnblogs.com adds 849ms and costs ~¥42/month
  • Unattributable adds 491ms and costs ~¥24/month
  • Google Tag Manager adds 226ms and costs ~¥11/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.cnblogs.com takes 849ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 491ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 226ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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