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.
3.03 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.21 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.61 s
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.
4.87 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.
7.93 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4544ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://pss.bdstatic.com/static/superman-san/app/chat-input/result_ad43ead.js | 3717ms | 686ms | 10ms | 3rd |
| https://hectorstatic.baidu.com/96c9c06653ba892e.js | 421ms | 390ms | 4ms | 3rd |
| Unattributable | 133ms | 3ms | 0ms | 3rd |
| https://www.baidu.com/ | 125ms | 11ms | 4ms | 3rd |
| https://pss.bdstatic.com/r/www/cache/static/protocol/https/global/js/all_async_search_42879a4.js | 74ms | 52ms | 18ms | 3rd |
| https://pss.bdstatic.com/static/superman/js/lib/esl-cf7161da9a.js | 74ms | 70ms | 1ms | 3rd |
DJS BundlesAction37 scripts, 288 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pss.bdstatic.com/r/www/cache/static/protocol/https/global/js/all_async_search_42879a4.js | 236 KB | 179 KB (77%) | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman-san/app/chat-input/result_ad43ead.js | 117 KB | 60 KB (52%) | ✓ | 3rd |
| https://pss.bdstatic.com/r/www/cache/static/protocol/https/amd_modules/@baidu/guarantee-popper_784e0ad.js | 40 KB | 25 KB (64%) | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/amd_modules/@baidu/video-meeting-1be7f62dac.js | 51 KB | 24 KB (49%) | ✗ | 3rd |
| https://pss.bdstatic.com/static/superman/js/components/tips-e2ceadd14d.js | 1 KB | — | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/js/components/advert-374dc154df.js | 2 KB | — | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/js/sbase-a0283e3a57.js | 20 KB | — | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/js/s_super_index-895c0c52f8.js | 1 KB | — | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/js/min_super-59d337a005.js | 22 KB | — | ✓ | 3rd |
| https://pss.bdstatic.com/static/superman/js/components/hotsearch-a9a64b4a19.js | 5 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
DPage Weight InventoryAction81 resources · 1.7 MB · 288 KB savings availableFIX
~288.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 81 resources | 1.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.7 MB transferred, 81 requestsREVIEW
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
BImage Optimization27 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (65 KB)PASS
Web fonts
2
65 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 Waterfall81 requests over 8884msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
pss.bdstatic.com pss.bdstatic.com | Other | 3717ms | 117 KB | 52% | ¥183/mo | Costly |
hectorstatic.baidu.com hectorstatic.baidu.com | Other | 421ms | 27 KB | — | ¥21/mo | Costly |
Unattributable Unattributable | Other | 133ms | 0 KB | — | ¥7/mo | Optional |
www.baidu.com www.baidu.com | Other | 125ms | 150 KB | — | ¥6/mo | Optional |
pss.bdstatic.com pss.bdstatic.com | Other | 74ms | 236 KB | 77% | ¥4/mo | Optional |
pss.bdstatic.com pss.bdstatic.com | Other | 74ms | 6 KB | — | ¥4/mo | Optional |
These scripts may cost more than they're worth
- pss.bdstatic.com adds 3717ms and costs ~¥183/month
- hectorstatic.baidu.com adds 421ms and costs ~¥21/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
pss.bdstatic.com takes 3717ms 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
52% of pss.bdstatic.com'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
hectorstatic.baidu.com takes 421ms 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
77% of pss.bdstatic.com'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