Performance
· 21 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.
1.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2 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.
1.30 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.
1.83 s
Page Load Progression
DThird-Party ImpactAction74% third-party, 0 ms blockingFIX
DPage Weight InventoryAction81 resources · 1.9 MB · 28 KB savings availableFIX
~27.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 81 resources | 1.9 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 |
CPage Weight BudgetAction1.9 MB transferred, 81 requestsREVIEW
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
BJS Execution Cost756ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ratemyscene.com/ | 284ms | 27ms | 13ms | 1st |
| Unattributable | 213ms | 21ms | 0ms | 1st |
| https://ratemyscene.com/_next/static/chunks/19tzvvdmjuk-1.js | 182ms | 172ms | 6ms | 1st |
| https://ratemyscene.com/_next/static/chunks/3uffv3gbundnd.js | 77ms | 58ms | 3ms | 1st |
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization33 images, 0 KB saveablePASS
A+Font Loading2 fonts (51 KB)PASS
Web fonts
2
51 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+JS Bundles11 scripts, 28 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://ratemyscene.com/_next/static/chunks/19tzvvdmjuk-1.js | 69 KB | 28 KB (40%) | ✓ | 1st |
| https://analytics.ratemyscene.com/script.js | 2 KB | — | ✓ | 3rd |
| https://ratemyscene.com/_next/static/chunks/2iho8jepmwwua.js | 2 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/29apvbdt3lgnr.js | 9 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/3uffv3gbundnd.js | 37 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/27jktro2p5rq9.js | 9 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/turbopack-2ghh648aegm68.js | 4 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/1867uhxhqh89h.js | 11 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/14mrh2-p_w84d.js | 13 KB | — | ✓ | 1st |
| https://ratemyscene.com/_next/static/chunks/1aau8okiep24-.js | 8 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
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+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
Network Waterfall81 requests over 27100msINFO
Image Optimization40 images, 69 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
40
Total Size
69 KB