Performance
· 26 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.
2.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
864 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.008
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
9.06 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.
10.67 s
Page Load Progression
FPage Weight BudgetAction10.1 MB transferred, 68 requestsFIX
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
FJS Execution CostAction12306ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.happygang.org/_next/static/chunks/4bd1b696-e356ca5ba0218e27.js | 6670ms | 754ms | 26ms | 1st |
| https://www.happygang.org/ | 1940ms | 53ms | 56ms | 1st |
| https://www.happygang.org/_next/static/chunks/3794-1b03b52e3112452e.js | 1570ms | 1440ms | 35ms | 1st |
| Unattributable | 1420ms | 29ms | 0ms | 1st |
| https://www.happygang.org/_next/static/chunks/app/(frontend)/page-ee010df99e2963c5.js | 581ms | 352ms | 3ms | 1st |
| https://www.happygang.org/_next/static/chunks/2828-2dba24397120dfaa.js | 125ms | 88ms | 19ms | 1st |
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 |
BImage Optimization42 images, 0 KB saveableREVIEW
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CPage Weight InventoryAction68 resources · 10.1 MB · 47 KB savings availableREVIEW
~46.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 68 resources | 10.1 MiB | ||||||
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party ImpactNo third-party resourcesPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (71 KB)PASS
Web fonts
1
71 KB total
Render-blocking
0
of 1
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+JS Bundles11 scripts, 47 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.happygang.org/_next/static/chunks/3794-1b03b52e3112452e.js | 59 KB | 24 KB (41%) | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/2828-2dba24397120dfaa.js | 48 KB | 22 KB (47%) | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/webpack-89be934a3e3e43e2.js | 3 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/4bd1b696-e356ca5ba0218e27.js | 62 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/main-app-dd34b0e775cca20f.js | 1 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/app/(frontend)/layout-2bfc7f6a29d74c64.js | 6 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/8500-f62a38ff68ab7f42.js | 4 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/3672-4e22445f73dd346c.js | 4 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/4271-9552a7a7112b07a5.js | 4 KB | — | ✓ | 1st |
| https://www.happygang.org/_next/static/chunks/314-94a03ee0ef1275f9.js | 5 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
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints3 hints, 0 missing preconnectsPASS
Current Resource Hints
3 resource hints configured
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Network Waterfall68 requests over 11041msINFO
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-07-05 — 2026-08-01)
LCP (p75)
1463 ms
91% good
INP (p75)
0 ms
0% good
CLS (p75)
0.010
96% good
FCP (p75)
899 ms
TTFB (p75)
0 ms
Image Optimization200 images, 7238 KB total, 3385 KB wastedINFO
Image Optimization Audit
Total Images
200
Total Size
7238 KB
Oversized
36
Wasted
3385 KB