Performance
· 18 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.
3.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.02 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
100.47 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.028
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
17.56 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.
127.10 s
Page Load Progression
DThird-Party ImpactAction90% third-party, 0 ms blockingFIX
FJS Execution CostAction139247ms 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 | 124798ms | 3068ms | 17ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/framework-bfbcaa5a2903bc7d.js | 4145ms | 2953ms | 21ms | 3rd |
| https://stripe.com/en-nl | 3366ms | 21ms | 1ms | 1st |
| Unattributable | 2526ms | 244ms | 0ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-c9f5f0718ed93d03.js | 1501ms | 1034ms | 363ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/index-8055f0676089a4d7.js | 734ms | 572ms | 157ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/84246.0054e08096e5226b.js | 648ms | 354ms | 17ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/38484-72a8319f943b4083.js | 440ms | 28ms | 4ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/81888-44c041869848e4ee.js | 438ms | 343ms | 15ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 272ms | 234ms | 35ms | 3rd |
Showing top 10 of 15 scripts
DPage Weight InventoryAction116 resources · 1.9 MB · 227 KB savings availableFIX
~226.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 116 resources | 1.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.9 MB transferred, 116 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 Optimization10 images, 0 KB saveableREVIEW
CJS BundlesAction84 scripts, 227 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-8055f0676089a4d7.js | 216 KB | 103 KB (48%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-c9f5f0718ed93d03.js | 399 KB | 81 KB (20%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 57 KB | 43 KB (76%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/4974.02a5d8bc0b5e0863.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/46537.50651df30a8c5fa4.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/42560.d6bdb7e42237de67.js | 4 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/16769.3ad7652c9d10fd9e.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/36766.f8478232cd8b3aed.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/webpack-ab33aa5b9ff210ca.js | 24 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/framework-bfbcaa5a2903bc7d.js | 43 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
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 Hints23 hints, 0 missing preconnectsPASS
Current Resource Hints
23 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall116 requests over 7806msINFO
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 | 124798ms | 23 KB | — | €662/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 4145ms | 43 KB | — | €22/mo | Costly |
Unattributable Unattributable | Other | 2526ms | 0 KB | — | €13/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 1501ms | 399 KB | 20% | €8/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 734ms | 216 KB | 48% | €4/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 648ms | 26 KB | — | €3/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 440ms | 9 KB | — | €2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 438ms | 19 KB | — | €2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 272ms | 57 KB | 76% | €1/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 146ms | 33 KB | — | €1/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 73ms | 22 KB | — | €0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 54ms | 5 KB | — | €0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 53ms | 70 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- b.stripecdn.com adds 124798ms and costs ~€662/month
- b.stripecdn.com adds 4145ms and costs ~€22/month
- Unattributable adds 2526ms and costs ~€13/month
- b.stripecdn.com adds 1501ms and costs ~€8/month
- b.stripecdn.com adds 734ms and costs ~€4/month
- b.stripecdn.com adds 648ms and costs ~€3/month
- b.stripecdn.com adds 440ms and costs ~€2/month
- b.stripecdn.com adds 438ms and costs ~€2/month
- b.stripecdn.com adds 272ms and costs ~€1/month
98% 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 124798ms 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 4145ms 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 2526ms 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 1501ms 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 734ms 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 648ms 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 440ms 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 438ms 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 272ms 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
76% of b.stripecdn.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
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 (2026-04-07 — 2026-05-04)
LCP (p75)
1117 ms
93% good
INP (p75)
96 ms
90% good
CLS (p75)
0.000
97% good
FCP (p75)
1062 ms
TTFB (p75)
459 ms