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.
653 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
881 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
25 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.
715 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.
1.01 s
Page Load Progression
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BHTTP Cachingpublic, max-age=0, must-revalidateREVIEW
public, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
A+Page Weight Budget292 KB transferred, 36 requestsPASS
A+Third-Party Impact1% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image OptimizationNo images on this pagePASS
A+JS Execution Cost404ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://sensconverter.org/_next/static/chunks/59-548f4271882cfb5f.js | 122ms | 109ms | 5ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-3XZBGKFSVY | 106ms | 91ms | 10ms | 3rd |
| https://sensconverter.org/ | 99ms | 1ms | 4ms | 1st |
| Unattributable | 78ms | 5ms | 0ms | 1st |
A+Font Loading2 fonts (88 KB)PASS
Web fonts
2
88 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 Bundles14 scripts, 24 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://sensconverter.org/_next/static/chunks/59-548f4271882cfb5f.js | 50 KB | 24 KB (48%) | ✓ | 1st |
| https://sensconverter.org/_next/static/chunks/main-app-56ca809ac99f47b5.js | 1 KB | — | ✓ | 1st |
| https://sensconverter.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js | 1 KB | — | ✓ | 1st |
| https://sensconverter.org/_next/static/chunks/webpack-81915df2aac055c1.js | 2 KB | — | ✓ | 1st |
| https://sensconverter.org/_next/static/chunks/aec749e8-f2c44eba138859e9.js | 52 KB | — | ✓ | 1st |
| https://app.pageview.app/js/script.js | 0 KB | — | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-3XZBGKFSVY | 0 KB | — | ✓ | 3rd |
| https://sensconverter.org/_next/static/chunks/34-1d219e58e6cd95e7.js | 6 KB | — | ✓ | 1st |
| https://sensconverter.org/_next/static/chunks/524-adb5710f628337ae.js | 23 KB | — | ✓ | 1st |
| https://sensconverter.org/_next/static/chunks/app/%5Blocale%5D/layout-b1c94a85750aebca.js | 9 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+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Page Weight Inventory36 resources · 292 KB · 24 KB savings availablePASS
~23.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 36 resources | 292.3 KiB | ||||||
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 Waterfall36 requests over 718msINFO
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 | 106ms | 0 KB | — | €2/mo | Optional |
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-10-02 — 2026-10-29)
LCP (p75)
972 ms
97% good
INP (p75)
43 ms
97% good
CLS (p75)
0.000
98% good
FCP (p75)
971 ms
TTFB (p75)
520 ms