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.
644 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.53 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
6 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.
1.05 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.
3.06 s
Page Load Progression
FPage Weight BudgetAction3.0 MB transferred, 81 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
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
FJS Execution CostAction5638ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ailearnhub.net/ | 3859ms | 4ms | 9ms | 1st |
| https://ailearnhub.net/_next/static/chunks/8319-5558a51099377b41.js | 1347ms | 1223ms | 3ms | 1st |
| Unattributable | 199ms | 4ms | 0ms | 1st |
| https://ailearnhub.net/_next/static/chunks/3a1933ef-9a24917e83d26ee1.js | 98ms | 22ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-5WTTQ88398 | 74ms | 59ms | 14ms | 3rd |
| https://ailearnhub.net/_next/static/chunks/857-77f7e2b52e38d26a.js | 61ms | 49ms | 12ms | 1st |
DJS BundlesAction50 scripts, 472 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://ailearnhub.net/_next/static/chunks/857-77f7e2b52e38d26a.js | 196 KB | 156 KB (80%) | ✓ | 1st |
| https://accounts.google.com/gsi/client | 97 KB | 72 KB (75%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-5WTTQ88398 | 168 KB | 70 KB (42%) | ✓ | 3rd |
| https://ailearnhub.net/_next/static/chunks/2762-70821536debe4006.js | 72 KB | 47 KB (68%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/6266-909182ec55ccc71c.js | 32 KB | 30 KB (96%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/4606-a3c0e914725a51e7.js | 37 KB | 29 KB (79%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/7983-38a4998539d93983.js | 32 KB | 27 KB (84%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/app/(workspace)/generation-preview/page-adf105709510ca9b.js | 24 KB | 21 KB (88%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/7633-a2f967e7ad8ba54c.js | 22 KB | 20 KB (93%) | ✓ | 1st |
| https://ailearnhub.net/_next/static/chunks/2090-0af1c734781421fa.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
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 · 3.0 MB · 472 KB savings availableFIX
~471.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 81 resources | 3.0 MiB | ||||||
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 Optimization6 images, 0 KB saveableREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
A+Third-Party Impact9% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (138 KB)PASS
Web fonts
2
138 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
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Compression AlgorithmMain 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 Response Intelligence2 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall81 requests over 4482msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 74ms | 168 KB | 42% | €0/mo | Optional |
Image Optimization21 images, 1818 KB total, 999 KB wastedINFO
Image Optimization Audit
Total Images
21
Total Size
1818 KB
Oversized
5
Wasted
999 KB