Performance
· 24 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.
3.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.74 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
101.26 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.
15.67 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.
126.27 s
Page Load Progression
DThird-Party ImpactAction90% third-party, 0 ms blockingFIX
FJS Execution CostAction138856ms 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 | 124694ms | 3102ms | 13ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/framework-bfbcaa5a2903bc7d.js | 4437ms | 3122ms | 21ms | 3rd |
| https://stripe.com/en-nl | 3116ms | 17ms | 1ms | 1st |
| Unattributable | 2454ms | 203ms | 0ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-d55238dd7cc28aa2.js | 1324ms | 744ms | 472ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/index-b09b2ca44f5e5ddc.js | 716ms | 541ms | 170ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/46687.21608bbbc5586ea3.js | 613ms | 376ms | 10ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/38484-72a8319f943b4083.js | 362ms | 19ms | 5ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/81888-44c041869848e4ee.js | 348ms | 314ms | 11ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 280ms | 241ms | 37ms | 3rd |
Showing top 10 of 14 scripts
DPage Weight InventoryAction115 resources · 1.8 MB · 219 KB savings availableFIX
~218.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 115 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, 115 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, 219 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 | 234 KB | 106 KB (45%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-d55238dd7cc28aa2.js | 340 KB | 70 KB (21%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 56 KB | 42 KB (76%) | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/92990.46ff2fd0e9076cf0.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/83316.2d4c534f14716a88.js | 1 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/83686-dac4cb39bc7757f9.js | 5 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/35546-d53e02f8a917cfc0.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/8542-04671882bfe8d457.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/80147-1c94f9a864388575.js | 3 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/9068-1891de298255d55e.js | 5 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
AResource Hints23 hints, 0 missing preconnectsPASS
Current Resource Hints
23 resource hints configured
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://q.stripe.com, https://r.stripe.com, https://images.stripeassets.com (+1 more). Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: b.stripecdn.com (preconnect+dns-prefetch), https://q.stripe.com (preconnect+dns-prefetch), https://r.stripe.com (preconnect+dns-prefetch) (+2 more).
Performance issues directly impact user engagement and conversion rates.
A+LCP Image PreloadLCP preload audit not availablePASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall115 requests over 7881msINFO
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 | 124694ms | 22 KB | — | €661/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 4437ms | 42 KB | — | €24/mo | Costly |
Unattributable Unattributable | Other | 2454ms | 0 KB | — | €13/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 1324ms | 340 KB | 21% | €7/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 716ms | 234 KB | 45% | €4/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 613ms | 7 KB | — | €3/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 362ms | 9 KB | — | €2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 348ms | 18 KB | — | €2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 280ms | 56 KB | 76% | €1/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 212ms | 24 KB | — | €1/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 174ms | 32 KB | — | €1/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 51ms | 68 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- b.stripecdn.com adds 124694ms and costs ~€661/month
- b.stripecdn.com adds 4437ms and costs ~€24/month
- Unattributable adds 2454ms and costs ~€13/month
- b.stripecdn.com adds 1324ms and costs ~€7/month
- b.stripecdn.com adds 716ms and costs ~€4/month
- b.stripecdn.com adds 613ms and costs ~€3/month
- b.stripecdn.com adds 362ms and costs ~€2/month
- b.stripecdn.com adds 348ms and costs ~€2/month
- b.stripecdn.com adds 280ms and costs ~€1/month
- b.stripecdn.com adds 212ms 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 124694ms 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 4437ms 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 2454ms 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 1324ms 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 716ms 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 613ms 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 362ms 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 348ms 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 280ms 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
b.stripecdn.com takes 212ms 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 (2026-04-09 — 2026-05-06)
LCP (p75)
1120 ms
93% good
INP (p75)
96 ms
90% good
CLS (p75)
0.000
97% good
FCP (p75)
1064 ms
TTFB (p75)
462 ms
Image Optimization42 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
42
Total Size
0 KB
Oversized
4