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.
1.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.50 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
18.35 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.015
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.24 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.
33.85 s
Page Load Progression
DThird-Party ImpactAction90% third-party, 0 ms blockingFIX
FJS Execution CostAction33420ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/50582.fb4a3d13071d1490.js | 31535ms | 391ms | 5ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/framework-bfbcaa5a2903bc7d.js | 628ms | 444ms | 3ms | 3rd |
| https://stripe.com/en-fr | 455ms | 2ms | 0ms | 1st |
| Unattributable | 388ms | 29ms | 0ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-d754bbe185e3da45.js | 194ms | 133ms | 43ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/index-b09b2ca44f5e5ddc.js | 89ms | 66ms | 19ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/46687.21608bbbc5586ea3.js | 72ms | 37ms | 1ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/38484-72a8319f943b4083.js | 57ms | 3ms | 1ms | 3rd |
DPage Weight InventoryAction122 resources · 1.8 MB · 232 KB savings availableFIX
~232.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 122 resources | 1.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.8 MB transferred, 122 requestsREVIEW
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
BImage Optimization9 images, 0 KB saveableREVIEW
CJS BundlesAction89 scripts, 232 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/index-b09b2ca44f5e5ddc.js | 238 KB | 108 KB (45%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-d754bbe185e3da45.js | 399 KB | 83 KB (21%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 57 KB | 42 KB (74%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/41485.c80134e97ad98903.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/15263.83460f5b8af8173e.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/76629.396a50238922b152.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/52643.2d78e2446d39abbd.js | 3 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/13956.1a44ca5c0dc36ae3.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/17006.2eb14a6f079c6644.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/77723.dd3ba52791b41cc0.js | 2 KB | — | ✓ | 3rd |
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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
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+Font Loading2 fonts (70 KB)PASS
Web fonts
2
70 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+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Network Waterfall122 requests over 6833msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
b.stripecdn.com b.stripecdn.com | Other | 31535ms | 23 KB | — | €132/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 628ms | 43 KB | — | €3/mo | Costly |
Unattributable Unattributable | Other | 388ms | 0 KB | — | €2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 194ms | 399 KB | 21% | €1/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 89ms | 238 KB | 45% | €0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 72ms | 7 KB | — | €0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 57ms | 9 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- b.stripecdn.com adds 31535ms and costs ~€132/month
- b.stripecdn.com adds 628ms and costs ~€3/month
- Unattributable adds 388ms and costs ~€2/month
99% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
b.stripecdn.com takes 31535ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
b.stripecdn.com takes 628ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 388ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-04-11 — 2026-05-08)
LCP (p75)
1124 ms
93% good
INP (p75)
96 ms
89% good
CLS (p75)
0.000
97% good
FCP (p75)
1070 ms
TTFB (p75)
465 ms
Image Optimization41 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
41
Total Size
0 KB
Oversized
4