Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.34 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
13 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.
1.29 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.
2.70 s
Page Load Progression
375 ms 750 ms
1.1 s
1.5 s 1.9 s 2.2 s 2.6 s 3.0 sDThird-Party ImpactAction99% third-party, 0 ms blockingFIX
DPage Weight InventoryAction60 resources · 1.9 MB · 180 KB savings availableFIX
~180.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 60 resources | 1.9 MiB | ||||||
CPage Weight BudgetAction1.9 MB transferred, 60 requestsREVIEW
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
BImage Optimization45 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost594ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.chsi.com.cn/ | 225ms | 4ms | 2ms | 1st |
| Unattributable | 221ms | 30ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-8YMQD1TE48&cx=c>m=4e64h1 | 80ms | 57ms | 21ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-100524-1 | 69ms | 54ms | 14ms | 3rd |
CJS BundlesAction7 scripts, 180 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-8YMQD1TE48&cx=c>m=4e64h1 | 166 KB | 69 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-100524-1 | 125 KB | 64 KB (51%) | ✓ | 3rd |
| https://t1.chei.com.cn/common/jquery/1.9.1/jquery.min.js | 38 KB | 25 KB (66%) | ✓ | 3rd |
| https://t1.chei.com.cn/common/plugins/swiper/5.2.0/swiper.min.js | 42 KB | 23 KB (56%) | ✓ | 3rd |
| https://t1.chei.com.cn/common/ch/browser/least-ie11.min.js | 1 KB | — | ✓ | 3rd |
| https://hm.baidu.com/hm.js?9c8767bf2ffaff9d16e0e409bd28017b | 12 KB | — | ✓ | 3rd |
| https://www.google-analytics.com/analytics.js | 21 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP CachingpublicREVIEW
public
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (25 KB)PASS
Web fonts
2
25 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall60 requests over 1965msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 221ms | 0 KB | — | ¥11/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 80ms | 166 KB | 41% | ¥4/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 125 KB | 51% | ¥3/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 221ms and costs ~¥11/month
62% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 221ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
51% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev