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https://listennotes.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
0
PASS
11
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

784 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

784 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

2 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.013

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

784 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.

1.11 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 s
Checks
15
11 PASS 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (667.4 KiB of 667.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

A+
Page Weight Budget
668 KB transferred, 25 requests
PASS
668 KB transferred, 25 requests
Info::
Page weighs 1.5 MB (668 KB transferred)
Info::
25 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
668 KB / 2.4 MB budget
668 KB transferred
25 requests
0.14 g CO2 per page load
HTML 298.2 KiB 45%
Other 274.9 KiB 41%
JavaScript 87.5 KiB 13%
Other 4.1 KiB 1%
Other 2.2 KiB 0%
Images 641 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Warning::
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACMAA... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
3 images 1 KB
0 oversized -0 KB
2 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+
JS Execution Cost
386ms total JS execution
PASS
386ms total JS execution
Info::
https://www.listennotes.com/cdn-cgi/challenge-plat...: 239ms CPU time
Info::
https://www.listennotes.com/?__cf_chl_rt_tk=J78jx0...: 94ms CPU time
Info::
Unattributable: 53ms CPU time
Warning::
Third-party scripts: 386ms (100% of total)

Main Thread Breakdown

Script Evaluation 73% Other 14% Script Parsing & Compilation 6% Style & Layout 3%
ScriptTotalScriptingParse/CompileParty
https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f08594fe8a899f1239ms228ms4ms3rd
https://www.listennotes.com/?__cf_chl_rt_tk=J78jx0HO7xn_IeiCchF4MGXbEeqYNy6OVxKxKa34Gmg-1776899919-1.0.1.1-z5feC8vGNqFT5M7y1T8GqE6VpbtT9iBasSOarp9FwT494ms62ms20ms3rd
Unattributable53ms2ms0ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
7 scripts, 0 KB unused
PASS
7 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f08594fe8a899f170 KB—✓3rd
blob:https://www.listennotes.com/be4f3a2f-2d62-4346-9bc8-546f7426ae050 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://www.listennotes.com/3e13bc0f-5add-47b7-a584-7c3e21639640-0 KB—✓3rd
blob:https://challenges.cloudflare.com/3bb4ae6a-1811-4102-96ed-71a4ff92be190 KB—✓3rd
blob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94-0 KB—✓3rd
blob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94-0 KB—✓3rd
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
25 resources · 668 KB · 0 KB savings available
PASS
25 resources · 668 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 668 KB
Warning::
23 third-party resources (100% of weight)
Info::
2 resources over 200KB
25 resources · 667.5 KiB · 23 third-party Within 1MB page-weight target
Document 46% · 305.8 KiB
Other 40% · 269.8 KiB
JavaScript 13% · 87.5 KiB
Image 1% · 4.5 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
25 requests over 2489ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 784 ms LCP 784 mshttps://listennotes.com// https://listennotes.com/ — 301 — 146 B — 55 ms — h3https://www.listennotes.com/www.listennotes.com/ https://www.listennotes.com/ — 307 — 65 B — 76 ms — http/1.1https://listennotes.com// https://listennotes.com/ — 301 — 0 B — 1 ms — h3https://www.listennotes.com/www.listennotes.com/ https://www.listennotes.com/ — 403 — 202.6 KiB — 102 ms — h3https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f08594fe8a899f1www.listennotes.com/cdn-cgi/challen... https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f08594fe8a899f1 — 200 — 70.1 KiB — 36 ms — h3data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACMAAAAjACAMAAADsLjMXAAAC/VBMVEUAAAAAAAAAAAAAAAAAAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAACMAAAAjACAMAAADsLjMXAAAC/VBMVEUAAAAAAAAAAAAAAAAAAAAAA… — 200 — 0 B — 1 ms — datahttps://srv.carbonads.net/ads/.json?segment=placement:&v=truesrv.carbonads.net/ads/.json?segment... https://srv.carbonads.net/ads/.json?segment=placement:&v=true — -1 — 0 B — 117 ms — https://srv.carbonads.net/ads/.json?segment=placement:&v=truesrv.carbonads.net/ads/.json?segment... https://srv.carbonads.net/ads/.json?segment=placement:&v=true — 200 — 0 B — 88 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-LT7880B924&gtm=45je4790v9189563880za200&_p=1776899919482&gcd=13l3l3l3l1&npa=0&dma=0&tag_exp=0&cid=1864928546.1776899920&ul=en-us&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&are=1&frm=0&pscdl=noapi&_s=1&sid=1776899919&sct=1&seg=0&dl=https%3A%2F%2Fwww.listennotes.com%2F%3F__cf_chl_rt_tk%3DJ78jx0HO7xn_IeiCchF4MGXbEeqYNy6OVxKxKa34Gmg-1776899919-1.0.1.1-z5feC8vGNqFT5M7y1T8GqE6VpbtT9iBasSOarp9FwT4&dt=Are%20you%20a%20robot%3F%202001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=316&_z=fetchwww.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-LT7880B924&gtm=45je4790v9189563880za200&_p=1776899919482&gcd=13l3l3l3l1&npa=0&dma=0&tag_exp=0&cid=1864928546.1776899920&ul=en-us&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&are=1&frm=0&pscdl=noapi&_s=1&sid=1776899919&sct=1&seg=0&dl=https%3A%2F%2Fwww.listennotes.com%2F%3F__cf_chl_rt_tk%3DJ78jx0HO7xn_IeiCchF4MGXbEeqYNy6OVxKxKa34Gmg-1776899919-1.0.1.1-z5feC8vGNqFT5M7y1T8GqE6VpbtT9iBasSOarp9FwT4&dt=Are%20you%20a%20robot%3F%202001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=316&_z=fetch — 204 — 552 B — 90 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-LT7880B924&gtm=45je4790v9189563880za200&_p=1776899919482&gcd=13l3l3l3l1&npa=0&dma=0&tag_exp=0&cid=1864928546.1776899920&ul=en-us&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&are=1&frm=0&pscdl=noapi&_s=2&sid=1776899919&sct=1&seg=0&dl=https%3A%2F%2Fwww.listennotes.com%2F%3F__cf_chl_rt_tk%3DJ78jx0HO7xn_IeiCchF4MGXbEeqYNy6OVxKxKa34Gmg-1776899919-1.0.1.1-z5feC8vGNqFT5M7y1T8GqE6VpbtT9iBasSOarp9FwT4&dt=Are%20you%20a%20robot%3F%202001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&en=js_challenge&_ee=1&ep.ip=2001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&_et=3&tfd=337&_z=fetchwww.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-LT7880B924&gtm=45je4790v9189563880za200&_p=1776899919482&gcd=13l3l3l3l1&npa=0&dma=0&tag_exp=0&cid=1864928546.1776899920&ul=en-us&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&are=1&frm=0&pscdl=noapi&_s=2&sid=1776899919&sct=1&seg=0&dl=https%3A%2F%2Fwww.listennotes.com%2F%3F__cf_chl_rt_tk%3DJ78jx0HO7xn_IeiCchF4MGXbEeqYNy6OVxKxKa34Gmg-1776899919-1.0.1.1-z5feC8vGNqFT5M7y1T8GqE6VpbtT9iBasSOarp9FwT4&dt=Are%20you%20a%20robot%3F%202001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&en=js_challenge&_ee=1&ep.ip=2001%3A41d0%3Aab00%3A%3A4%3A0%3A8c&_et=3&tfd=337&_z=fetch — 204 — 48 B — 69 ms — h2blob:https://www.listennotes.com/be4f3a2f-2d62-4346-9bc8-546f7426ae05www.listennotes.com/be4f3a2f-2d62-4... blob:https://www.listennotes.com/be4f3a2f-2d62-4346-9bc8-546f7426ae05 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 61 ms — h3https://www.listennotes.com/favicon.icowww.listennotes.com/favicon.ico https://www.listennotes.com/favicon.ico — 200 — 3.8 KiB — 25 ms — h3https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2745934750:1776895631:NxEosYmLaAWuW0xG9JSRvOdfMvuQUXMoCt2KKdp2IzA/9f08594fe8a899f1/1QVy7iUIqwT.ZRoAQ5l60TM.0g7Jdt0yS1uM_WcpOHI-1776899919-1.2.1.1-ryw0qe3XyECkaC_7g7.FuCGS.RNU.chAlw5j0Fh1nLcqqHRh6_qYVODKywF3q.Ahwww.listennotes.com/cdn-cgi/challen... https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2745934750:1776895631:NxEosYmLaAWuW0xG9JSRvOdfMvuQUXMoCt2KKdp2IzA/9f08594fe8a899f1/1QVy7iUIqwT.ZRoAQ5l60TM.0g7Jdt0yS1uM_WcpOHI-1776899919-1.2.1.1-ryw0qe3XyECkaC_7g7.FuCGS.RNU.chAlw5j0Fh1nLcqqHRh6_qYVODKywF3q.Ah — 200 — 13.1 KiB — 34 ms — h3blob:https://www.listennotes.com/3e13bc0f-5add-47b7-a584-7c3e21639640www.listennotes.com/3e13bc0f-5add-4... blob:https://www.listennotes.com/3e13bc0f-5add-47b7-a584-7c3e21639640 — 200 — -1 B — 22 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/7mtvf/0x4AAAAAAADnOjc0PNeA8qVm/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/7mtvf/0x4AAAAAAADnOjc0PNeA8qVm/light/fbE/new/normal?lang=auto — 200 — 95.6 KiB — 96 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 22 ms — h3blob:https://challenges.cloudflare.com/3bb4ae6a-1811-4102-96ed-71a4ff92be19challenges.cloudflare.com/3bb4ae6a-... blob:https://challenges.cloudflare.com/3bb4ae6a-1811-4102-96ed-71a4ff92be19 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/127823667:1776895633:NE5HXOchrRXigR3PNYrzEyiJuxfY81tRlOL6B6yM9fA/9f085952ce26d473/tYe7Gv4rQUoUwMWIc9E_gib_cTo32ovVE.Fb3cIQzYI-1776899919-1.2.1.1-QqUeQk.XnTYwBWXLZl3Kpnm5PCwHLwxYIoNAvNbaKirlRacdu9rOikHSfzJ4cJltchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/127823667:1776895633:NE5HXOchrRXigR3PNYrzEyiJuxfY81tRlOL6B6yM9fA/9f085952ce26d473/tYe7Gv4rQUoUwMWIc9E_gib_cTo32ovVE.Fb3cIQzYI-1776899919-1.2.1.1-QqUeQk.XnTYwBWXLZl3Kpnm5PCwHLwxYIoNAvNbaKirlRacdu9rOikHSfzJ4cJlt — 200 — 254.3 KiB — 130 ms — h3blob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94challenges.cloudflare.com/1a50f612-... blob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94 — 200 — -1 B — 72 ms — blobblob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94challenges.cloudflare.com/1a50f612-... blob:https://challenges.cloudflare.com/1a50f612-570a-41a9-b4c5-bf3f65c20f94 — 200 — -1 B — 15 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f085952ce26d473/1776899920097/Kq-Ll1UY66hytK8challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f085952ce26d473/1776899920097/Kq-Ll1UY66hytK8 — 200 — 433 B — 21 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f085952ce26d473/1776899920097/1d30933818ff153cc94ddf0b691050eb8f628ea5265405bc3c88ef20db8f145d/5og9skLoqr2bYFichallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f085952ce26d473/1776899920097/1d30933818ff153cc94ddf0b691050eb8f628ea5265405bc3c88ef20db8f145d/5og9skLoqr2bYFi — 401 — 1.7 KiB — 20 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/127823667:1776895633:NE5HXOchrRXigR3PNYrzEyiJuxfY81tRlOL6B6yM9fA/9f085952ce26d473/tYe7Gv4rQUoUwMWIc9E_gib_cTo32ovVE.Fb3cIQzYI-1776899919-1.2.1.1-QqUeQk.XnTYwBWXLZl3Kpnm5PCwHLwxYIoNAvNbaKirlRacdu9rOikHSfzJ4cJltchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/127823667:1776895633:NE5HXOchrRXigR3PNYrzEyiJuxfY81tRlOL6B6yM9fA/9f085952ce26d473/tYe7Gv4rQUoUwMWIc9E_gib_cTo32ovVE.Fb3cIQzYI-1776899919-1.2.1.1-QqUeQk.XnTYwBWXLZl3Kpnm5PCwHLwxYIoNAvNbaKirlRacdu9rOikHSfzJ4cJlt — 200 — 4.5 KiB — 37 ms — h3https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2745934750:1776895631:NxEosYmLaAWuW0xG9JSRvOdfMvuQUXMoCt2KKdp2IzA/9f08594fe8a899f1/1QVy7iUIqwT.ZRoAQ5l60TM.0g7Jdt0yS1uM_WcpOHI-1776899919-1.2.1.1-ryw0qe3XyECkaC_7g7.FuCGS.RNU.chAlw5j0Fh1nLcqqHRh6_qYVODKywF3q.Ahwww.listennotes.com/cdn-cgi/challen... https://www.listennotes.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2745934750:1776895631:NxEosYmLaAWuW0xG9JSRvOdfMvuQUXMoCt2KKdp2IzA/9f08594fe8a899f1/1QVy7iUIqwT.ZRoAQ5l60TM.0g7Jdt0yS1uM_WcpOHI-1776899919-1.2.1.1-ryw0qe3XyECkaC_7g7.FuCGS.RNU.chAlw5j0Fh1nLcqqHRh6_qYVODKywF3q.Ah — 200 — 3.1 KiB — 30 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 386ms · 70KB · $5/mo
www.listennotes.com
Other
Costly
Execution 239ms
Transfer 70 KB
Monthly Cost $3/mo
www.listennotes.com
Other
Optional
Execution 94ms
Transfer 0 KB
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 53ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.listennotes.com adds 239ms and costs ~$3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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 239ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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