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.
876 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.35 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
23.10 s
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.
3.86 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.
35.50 s
Page Load Progression
3.7 s
7.4 s
11.1 s
14.8 s
18.5 s
22.2 s
25.9 s
29.6 sFPage Weight BudgetAction2.6 MB transferred, 177 requestsFIX
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
DThird-Party ImpactAction93% third-party, 0 ms blockingFIX
FJS Execution CostAction34929ms 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 | 32596ms | 417ms | 3ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/framework-bfbcaa5a2903bc7d.js | 840ms | 567ms | 13ms | 3rd |
| https://stripe.com/ | 423ms | 3ms | 0ms | 1st |
| Unattributable | 344ms | 38ms | 0ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/_app-d55238dd7cc28aa2.js | 273ms | 180ms | 71ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/pages/index-b09b2ca44f5e5ddc.js | 146ms | 92ms | 31ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/46687.21608bbbc5586ea3.js | 112ms | 62ms | 2ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/38484-72a8319f943b4083.js | 76ms | 3ms | 1ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/81888-44c041869848e4ee.js | 66ms | 61ms | 2ms | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/c67c952e-7f65a464f661b1d2.js | 53ms | 46ms | 7ms | 3rd |
DPage Weight InventoryAction177 resources · 2.6 MB · 232 KB savings availableFIX
~232.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 177 resources | 2.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization27 images, 0 KB saveableREVIEW
CJS BundlesAction103 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-d55238dd7cc28aa2.js | 400 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/2791.83aa5fb914de3e9d.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/34552.fae148eb6b06113b.js | 2 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/96201.b69ca6d7416f24b0.js | 3 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/77723.dd3ba52791b41cc0.js | 2 KB | — | ✓ | 3rd |
| https://b.stripecdn.com/mkt-ssr-statics/assets/_next/static/chunks/96550.6f7488d7e4331269.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
Network Waterfall177 requests over 6491msINFO
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 | 32596ms | 23 KB | — | $187/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 840ms | 43 KB | — | $5/mo | Costly |
Unattributable Unattributable | Other | 344ms | 0 KB | — | $2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 273ms | 400 KB | 21% | $2/mo | Costly |
b.stripecdn.com b.stripecdn.com | Other | 146ms | 238 KB | 45% | $1/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 112ms | 7 KB | — | $1/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 76ms | 9 KB | — | $0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 66ms | 18 KB | — | $0/mo | Optional |
b.stripecdn.com b.stripecdn.com | Other | 53ms | 57 KB | 74% | $0/mo | Optional |
These scripts may cost more than they're worth
- b.stripecdn.com adds 32596ms and costs ~$187/month
- b.stripecdn.com adds 840ms and costs ~$5/month
- Unattributable adds 344ms and costs ~$2/month
- b.stripecdn.com adds 273ms 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 32596ms 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 840ms 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 344ms 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 273ms 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
74% 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 (2026-04-09 — 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