Performance
· 22 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.
808 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.57 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
8 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.038
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
808 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.73 s
Page Load Progression
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BPage Weight Budget1.0 MB transferred, 63 requestsREVIEW
BJS Execution Cost767ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://chineseface.app/ | 350ms | 7ms | 8ms | 1st |
| https://chineseface.app/_next/static/chunks/0d65ce108889130a.js | 256ms | 243ms | 7ms | 1st |
| Unattributable | 109ms | 8ms | 0ms | 1st |
| https://chineseface.app/pwa-prompt.js | 52ms | 52ms | 0ms | 1st |
BJS Bundles31 scripts, 135 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://chineseface.app/_next/static/chunks/7cc9d8b2d1425685.js | 67 KB | 56 KB (84%) | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/d92a56fffd88a38f.js | 70 KB | 55 KB (84%) | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/0d65ce108889130a.js | 71 KB | 24 KB (34%) | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/712922a2c0e7ffee.js | 21 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/e767791ab1bb9364.js | 8 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/60b9f827cff795ec.js | 14 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/turbopack-257c8d00a9f5e484.js | 5 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/4ec9ef178f4f3ca6.js | 2 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/f612b7202affd086.js | 8 KB | — | ✓ | 1st |
| https://chineseface.app/_next/static/chunks/f38ebde9f62d89f6.js | 15 KB | — | ✓ | 1st |
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
A+Third-Party Impact1% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization4 images, 0 KB saveablePASS
A+Font Loading3 fonts (106 KB)PASS
Web fonts
3
106 KB total
Render-blocking
0
of 3
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
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Page Weight Inventory63 resources · 1.0 MB · 135 KB savings availablePASS
~134.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 63 resources | 1.0 MiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall63 requests over 4151msINFO
Image Optimization13 images, 342 KB total, 203 KB wastedINFO
Image Optimization Audit
Total Images
13
Total Size
342 KB
Oversized
2
Wasted
203 KB