Performance
· 17 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.
2.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.53 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
729 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.085
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.88 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.
5.50 s
Page Load Progression
375 ms
750 ms 1.1 s 1.5 s 1.9 s 2.2 s 2.6 s 3.0 sDThird-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.
CJS Execution CostAction1692ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f0858f89b320485 | 901ms | 852ms | 16ms | 3rd |
| https://www.listennotes.com/?__cf_chl_rt_tk=X07vCT5wJu7CeU9HjSYDwxZdg_I1ElFhZBWHTy3zZ24-1776899905-1.0.1.1-8pYYTMVS75mQgwlGzuYqU__b6QuNx1Sxt5QHKRjzPVs | 336ms | 231ms | 68ms | 3rd |
| Unattributable | 182ms | 7ms | 0ms | 3rd |
| https://www.listennotes.com/ | 145ms | 48ms | 7ms | 3rd |
| https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit | 128ms | 116ms | 4ms | 3rd |
A+Page Weight Budget669 KB transferred, 25 requestsPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization3 images, 0 KB saveablePASS
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font LoadingNo web fonts (system fonts)PASS
A+JS Bundles7 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f0858f89b320485 | 72 KB | — | ✓ | 3rd |
| blob:https://www.listennotes.com/d0a8d2ac-6291-4177-9b15-9fe84004059a | 0 KB | — | ✓ | 3rd |
| https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit | 17 KB | — | ✓ | 3rd |
| blob:https://www.listennotes.com/f7a82952-2b02-4f0f-aacd-1399f0813d19 | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/c6c3b3d6-8437-46d2-b8d9-0cb0cb2c119e | 0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/a63a0fae-76be-475f-8ae5-90cae31d6369 | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/a63a0fae-76be-475f-8ae5-90cae31d6369 | -0 KB | — | ✓ | 3rd |
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
APage Weight Inventory25 resources · 669 KB · 0 KB savings availablePASS
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 25 resources | 669.5 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall25 requests over 2429msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.listennotes.com www.listennotes.com | Other | 901ms | 72 KB | — | $12/mo | Costly |
www.listennotes.com www.listennotes.com | Other | 336ms | 0 KB | — | $4/mo | Costly |
Unattributable Unattributable | Other | 182ms | 0 KB | — | $2/mo | Optional |
www.listennotes.com www.listennotes.com | Other | 145ms | 202 KB | — | $2/mo | Optional |
challenges.cloudflare.com challenges.cloudflare.com | Other | 128ms | 17 KB | — | $2/mo | Optional |
These scripts may cost more than they're worth
- www.listennotes.com adds 901ms and costs ~$12/month
- www.listennotes.com adds 336ms and costs ~$4/month
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
www.listennotes.com takes 901ms 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
www.listennotes.com takes 336ms 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