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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
67
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

775 ms

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

1.62 s

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

6 ms

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

0.991

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

1.50 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.

2.93 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
6 PASS 3 REVIEW 4 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 (1.9 MiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
16 scripts, 372 KB unused
FIX
16 scripts, 372 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 148 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-HTNW...: 64 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-331...: 64 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.linux.org/js/xf/core-compiled.js?_v=96...: 38 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/ca-pub...: 36 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 372 KB
372 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604160101/show_ads_impl_fy2021.js178 KB148 KB (83%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HTNW3VXTNH&cx=c&gtm=4e64h1146 KB64 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-3314314-270125 KB64 KB (51%)✓3rd
https://www.linux.org/js/xf/core-compiled.js?_v=96f78a6e54 KB38 KB (72%)✓3rd
https://fundingchoicesmessages.google.com/i/ca-pub-4059641217434021?href=https%3A%2F%2Fwww.linux.org&ers=270 KB36 KB (52%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js54 KB23 KB (42%)✓3rd
https://www.linux.org/js/8wayrun/porta/portal.min.js?_v=96f78a6e3 KB—✓3rd
https://www.linux.org/js/8wayrun/porta/images.min.js?_v=96f78a6e2 KB—✓3rd
https://www.linux.org/js/xf/tooltip.min.js?_v=96f78a6e_mt=undefined1 KB—✓3rd
https://www.linux.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?13 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D
Page Weight Inventory
Action
67 resources · 1.9 MB · 372 KB savings available
FIX
67 resources · 1.9 MB · 372 KB savings available
Warning::
Page weight 953 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~372 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
2 resources over 200KB
67 resources · 1.9 MiB · 66 third-party 952.8 KiB over 1MB target
Image 47% · 935.7 KiB
JavaScript 38% · 745.2 KiB
Font 10% · 195.6 KiB
CSS 3% · 67.4 KiB
Document 1% · 29.3 KiB
Other 0% · 3.6 KiB

~372.2 KiB of savings available

Remove unused JavaScript: 372.2 KiB
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.

C
Page Weight Budget
Action
1.9 MB transferred, 67 requests
REVIEW
1.9 MB transferred, 67 requests
Info::
Page weighs 4.2 MB (1.9 MB transferred)
Warning::
JavaScript is 745 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 745 KB
Info::
67 HTTP requests
Info::
Estimated 0.40 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
67 requests
0.40 g CO2 per page load
JavaScript 745.2 KiB 38%
Images 688.1 KiB 35%
Other 248.8 KiB 13%
Fonts 195.6 KiB 10%
CSS 67.4 KiB 3%
HTML 28.7 KiB 1%
Other 2.5 KiB 0%
Other 548 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

C
Image Optimization
Action
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Warning::
https://www.linux.org/images/linux-youtube-300x100... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.linux.org/images/logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.linux.org/images/linux-org_shirt_adver... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28 images 688 KB
0 oversized -0 KB
28 legacy format
3 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

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

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

B
JS Execution Cost
769ms total JS execution
REVIEW
769ms total JS execution
Warning::
https://www.linux.org/: 282ms CPU time
Info::
https://www.linux.org/cdn-cgi/challenge-platform/s...: 128ms CPU time
Info::
Unattributable: 114ms CPU time
Info::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 81ms CPU time
Info::
https://fundingchoicesmessages.google.com/i/ca-pub...: 58ms CPU time
Warning::
Third-party scripts: 769ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 18% Style & Layout 16% Rendering 8% Script Parsing & Compilation 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.linux.org/282ms23ms2ms3rd
https://www.linux.org/cdn-cgi/challenge-platform/scripts/jsd/main.js128ms119ms3ms3rd
Unattributable114ms3ms0ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxUNcK6VMc7XSq7LwS3M3HNIEjp4O1qalj0atoPNoLj84D4aBR9XcuUk9f7xeRcv0r64zUtINMDUiJhyRu_POlEnd9gzwu4AMV4OoQ6tJ_IpbUvKym3skHQkTLNhIJXrhPExbh3zCg==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODE0NDUwLDc1NzAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzcsMTldXSwiaHR0cHM6Ly93d3cubGludXgub3JnLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDEwMzhdXV0iXSxbMzUsIjE3NzY4MTQ0NTAiXSxbMTksIjEiXSxbMTcsIlswXSJdLFsyNCwiIl0sWzI5LCJmYWxzZSJdXV081ms41ms10ms3rd
https://fundingchoicesmessages.google.com/i/ca-pub-4059641217434021?href=https%3A%2F%2Fwww.linux.org&ers=258ms52ms4ms3rd
https://www.googletagmanager.com/gtag/js?id=G-HTNW3VXTNH&cx=c&gtm=4e64h157ms47ms9ms3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js51ms33ms14ms3rd
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+
Font Loading
2 fonts (196 KB)
PASS
2 fonts (196 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

196 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 775 ms LCP 1.6 shttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2 — 153.5 KiB — 74 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.1 KiB — 90 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 154 KB
Load time 74 ms
Start 864 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 90 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
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)

Fixing the unchecked items could save ~77 KB and ~154 ms

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+
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
67 requests over 1577ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 775 ms LCP 1.6 shttps://linux.org// https://linux.org/ — 301 — 508 B — 132 ms — h3https://www.linux.org/www.linux.org/ https://www.linux.org/ — 200 — 26.8 KiB — 212 ms — h3https://www.linux.org/cdn-cgi/speculationwww.linux.org/cdn-cgi/speculation https://www.linux.org/cdn-cgi/speculation — 200 — 561 B — 25 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 54 ms — h3https://www.linux.org/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1774975704&k=8dd9b74a13a25da8f76014dc20b0364433a25f4cwww.linux.org/css.php?css=public%3A... https://www.linux.org/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1774975704&k=8dd9b74a13a25da8f76014dc20b0364433a25f4c — 200 — 34.2 KiB — 127 ms — h3https://www.linux.org/css.php?css=public%3AEWRporta.less%2Cpublic%3AEWRporta_articles.less%2Cpublic%3Amessage.less%2Cpublic%3Astructured_list.less%2Cpublic%3Aextra.less&s=1&l=1&d=1774975704&k=43678531c7e23329f3913872475221a3eaf38716www.linux.org/css.php?css=public%3A... https://www.linux.org/css.php?css=public%3AEWRporta.less%2Cpublic%3AEWRporta_articles.less%2Cpublic%3Amessage.less%2Cpublic%3Astructured_list.less%2Cpublic%3Aextra.less&s=1&l=1&d=1774975704&k=43678531c7e23329f3913872475221a3eaf38716 — 200 — 7.5 KiB — 116 ms — h3https://www.linux.org/js/xf/preamble.min.js?_v=96f78a6ewww.linux.org/js/xf/preamble.min.js... https://www.linux.org/js/xf/preamble.min.js?_v=96f78a6e — 200 — 2.3 KiB — 30 ms — h3https://www.linux.org/images/logo.pngwww.linux.org/images/logo.png https://www.linux.org/images/logo.png — 200 — 5.0 KiB — 29 ms — h3https://www.linux.org/images/linux-org_shirt_advert3.pngwww.linux.org/images/linux-org_shir... https://www.linux.org/images/linux-org_shirt_advert3.png — 200 — 75.3 KiB — 56 ms — h3https://www.linux.org/images/linux-youtube-300x100_3.pngwww.linux.org/images/linux-youtube-... https://www.linux.org/images/linux-youtube-300x100_3.png — 200 — 46.6 KiB — 42 ms — h3https://analytics.ahrefs.com/api/eventanalytics.ahrefs.com/api/event https://analytics.ahrefs.com/api/event — 200 — 306 B — 144 ms — h3https://www.linux.org/js/vendor/vendor-compiled.js?_v=96f78a6ewww.linux.org/js/vendor/vendor-comp... https://www.linux.org/js/vendor/vendor-compiled.js?_v=96f78a6e — 200 — 5.0 KiB — 26 ms — h3https://www.linux.org/js/xf/core-compiled.js?_v=96f78a6ewww.linux.org/js/xf/core-compiled.j... https://www.linux.org/js/xf/core-compiled.js?_v=96f78a6e — 200 — 53.8 KiB — 33 ms — h3https://www.linux.org/js/8wayrun/porta/portal.min.js?_v=96f78a6ewww.linux.org/js/8wayrun/porta/port... https://www.linux.org/js/8wayrun/porta/portal.min.js?_v=96f78a6e — 200 — 2.6 KiB — 27 ms — h3https://www.linux.org/js/8wayrun/porta/images.min.js?_v=96f78a6ewww.linux.org/js/8wayrun/porta/imag... https://www.linux.org/js/8wayrun/porta/images.min.js?_v=96f78a6e — 200 — 2.3 KiB — 27 ms — h3https://www.googletagmanager.com/gtag/js?id=UA-3314314-270www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-3314314-270 — 200 — 125.3 KiB — 142 ms — h2https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.jspagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js — 200 — 54.4 KiB — 111 ms — h3https://www.linux.org/data/local/icons/regular.svg?v=1774975704www.linux.org/data/local/icons/regu... https://www.linux.org/data/local/icons/regular.svg?v=1774975704 — 200 — 39.2 KiB — 35 ms — h3https://www.linux.org/styles/fa/solid/caret-down.svg?v=5.15.3www.linux.org/styles/fa/solid/caret... https://www.linux.org/styles/fa/solid/caret-down.svg?v=5.15.3 — 200 — 744 B — 30 ms — h3https://www.linux.org/styles/fa/regular/search.svg?v=5.15.3www.linux.org/styles/fa/regular/sea... https://www.linux.org/styles/fa/regular/search.svg?v=5.15.3 — 200 — 857 B — 26 ms — h3https://www.linux.org/styles/fa/regular/angle-right.svg?v=5.15.3www.linux.org/styles/fa/regular/ang... https://www.linux.org/styles/fa/regular/angle-right.svg?v=5.15.3 — 200 — 764 B — 28 ms — h3https://www.linux.org/articles/attachments/figure-02-jpg.30932/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-02-jpg.30932/ — 200 — 98.9 KiB — 213 ms — h3https://www.linux.org/articles/attachments/figure-4-jpg.29238/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-4-jpg.29238/ — 200 — 214.3 KiB — 174 ms — h3https://www.linux.org/articles/attachments/figure-2-jpg.29228/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-2-jpg.29228/ — 200 — 59.9 KiB — 143 ms — h3https://www.linux.org/articles/attachments/figure-2-jpg.28896/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-2-jpg.28896/ — 200 — 8.5 KiB — 157 ms — h3https://www.linux.org/articles/attachments/figure-01-jpg.28885/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-01-jpg.28885/ — 200 — 74.1 KiB — 169 ms — h3https://www.linux.org/articles/attachments/figure-01-jpg.28874/www.linux.org/articles/attachments/... https://www.linux.org/articles/attachments/figure-01-jpg.28874/ — 200 — 76.2 KiB — 172 ms — h3https://www.linux.org/styles/fa/solid/caret-right.svg?v=5.15.3www.linux.org/styles/fa/solid/caret... https://www.linux.org/styles/fa/solid/caret-right.svg?v=5.15.3 — 200 — 757 B — 28 ms — h3https://www.linux.org/styles/fa/regular/lock.svg?v=5.15.3www.linux.org/styles/fa/regular/loc... https://www.linux.org/styles/fa/regular/lock.svg?v=5.15.3 — 200 — 825 B — 27 ms — h3https://www.linux.org/data/avatars/s/29/29858.jpg?1495487162www.linux.org/data/avatars/s/29/298... https://www.linux.org/data/avatars/s/29/29858.jpg?1495487162 — 200 — 1.6 KiB — 27 ms — h3
0 ms 500 ms 1.0 s 1.5 s FCP 775 ms LCP 1.6 shttps://linux.org// https://linux.org/ — 301 — 508 B — 132 ms — h3https://www.linux.org/www.linux.org/ https://www.linux.org/ — 200 — 26.8 KiB — 212 ms — h3https://www.linux.org/cdn-cgi/speculationwww.linux.org/cdn-cgi/speculation https://www.linux.org/cdn-cgi/speculation — 200 — 561 B — 25 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 54 ms — h3https://www.linux.org/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1774975704&k=8dd9b74a13a25da8f76014dc20b0364433a25f4cwww.linux.org/css.php?css=public%3A... https://www.linux.org/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1774975704&k=8dd9b74a13a25da8f76014dc20b0364433a25f4c — 200 — 34.2 KiB — 127 ms — 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h3https://fundingchoicesmessages.google.com/el/AGSKWxW5MgrptyiYVx5flRbRRNIqatrcDqsjSTvjrFaUGSy2wOO2viOpK40ta-nXBKeWH-NuN_Y30UoZR52ep7GA09E5XMPSeeSh86p4Ae1tkXNk_s1a1hQp9kM4c_EVesf67lWmYpGrQA==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxW5MgrptyiYVx5flRbRRNIqatrcDqsjSTvjrFaUGSy2wOO2viOpK40ta-nXBKeWH-NuN_Y30UoZR52ep7GA09E5XMPSeeSh86p4Ae1tkXNk_s1a1hQp9kM4c_EVesf67lWmYpGrQA== — 204 — 28 B — 32 ms — h3https://www.linux.org/images/linuxfav.png?v=1www.linux.org/images/linuxfav.png?v... https://www.linux.org/images/linuxfav.png?v=1 — 200 — 208.3 KiB — 33 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 769ms · 366KB · $10/mo
www.linux.org
Other
Costly
Execution 282ms
Transfer 27 KB
Monthly Cost $4/mo
www.linux.org
Other
Optional
Execution 128ms
Transfer 0 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 114ms
Transfer 0 KB
Monthly Cost $2/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 81ms
Transfer 68 KB
Monthly Cost $1/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 58ms
Transfer 70 KB
Unused 52%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 146 KB
Unused 44%
Monthly Cost $1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 51ms
Transfer 54 KB
Unused 42%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.linux.org adds 282ms and costs ~$4/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.linux.org takes 282ms 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

52% of fundingchoicesmessages.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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