Performance
· 23 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.
857 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.21 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
68 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.010
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.19 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.
4.27 s
Page Load Progression
FPage Weight BudgetAction15.2 MB transferred, 119 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DJS Execution CostAction3240ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://bestvid.net/_next/static/chunks/4810-ffdffa02d66fa394.js | 1202ms | 50ms | 1ms | 1st |
| https://bestvid.net/_next/static/chunks/1170-ebaf9a48a12512dd.js | 714ms | 542ms | 3ms | 1st |
| https://bestvid.net/ | 652ms | 6ms | 11ms | 1st |
| Unattributable | 389ms | 8ms | 0ms | 1st |
| https://bestvid.net/_next/static/chunks/88ff4859-a8b8c1c02098d500.js | 181ms | 149ms | 3ms | 1st |
| https://scripts.clarity.ms/0.8.70/clarity.js | 101ms | 90ms | 1ms | 3rd |
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 Optimization40 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 Bundles51 scripts, 98 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 99 KB | 75 KB (76%) | ✓ | 3rd |
| https://bestvid.net/_next/static/chunks/2072-52a62217aa49bf48.js | 39 KB | 23 KB (59%) | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/webpack-3cb3d406cc357142.js | 7 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/88ff4859-a8b8c1c02098d500.js | 54 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/1170-ebaf9a48a12512dd.js | 46 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/main-app-3d0cf0cf14cdf203.js | 1 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/9522-e2f4c961eed6c5ec.js | 16 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/945-4cef3c5316e7df7b.js | 8 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/7298-db849e8c24df2a5b.js | 4 KB | — | ✓ | 1st |
| https://bestvid.net/_next/static/chunks/8526-2c3f04bc36323861.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
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CPage Weight InventoryAction119 resources · 15.2 MB · 98 KB savings availableREVIEW
~97.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 119 resources | 15.2 MiB | ||||||
A+Third-Party Impact1% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (124 KB)PASS
Web fonts
5
124 KB total
Render-blocking
0
of 5
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 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
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall119 requests over 6779msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Microsoft Clarity scripts.clarity.ms | Session Replay | 101ms | 25 KB | — | €1/mo | Optional |
Image Optimization82 images, 1718 KB total, 627 KB wastedINFO
Image Optimization Audit
Total Images
82
Total Size
1718 KB
Oversized
25
Wasted
627 KB