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.
779 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
924 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
852 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.
924 ms
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
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+Page Weight Budget592 KB transferred, 22 requestsPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization3 images, 0 KB saveablePASS
A+JS Execution Cost191ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://domains.atom.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9fe7d7c97bf5f45b | 191ms | 183ms | 3ms | 3rd |
A+Font LoadingNo web fonts (system fonts)PASS
A+JS Bundles8 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://domains.atom.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9fe7d7c97bf5f45b | 63 KB | — | ✓ | 3rd |
| blob:https://domains.atom.com/09094f27-babe-4713-9a51-010468b3fdf6 | 0 KB | — | ✓ | 3rd |
| https://challenges.cloudflare.com/turnstile/v0/g/825e783f7fae/api.js?onload=GHkYU6&render=explicit | 21 KB | — | ✓ | 3rd |
| blob:https://domains.atom.com/6f2e93b6-2cd8-4fa8-9489-edb0a3655180 | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/81aa6862-2362-4482-b753-3f030294218f | 0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/2e767387-19a4-4831-83de-9fa4d4ce148d | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/2e767387-19a4-4831-83de-9fa4d4ce148d | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/2c647a5b-e9bd-4d0d-a65d-062a22300d7d | -0 KB | — | ✓ | 3rd |
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
APage Weight Inventory22 resources · 592 KB · 0 KB savings availablePASS
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 22 resources | 592.3 KiB | ||||||
Network Waterfall22 requests over 2829msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
domains.atom.com domains.atom.com | Other | 191ms | 63 KB | — | $3/mo | Optional |
100% 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