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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
91
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.

2.26 s

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

10.14 s

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

317 ms

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

0.203

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

2.57 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.

10.14 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
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 59 requests
FIX
3.2 MB transferred, 59 requests
Warning::
Page weighs 5.8 MB (3.2 MB transferred)
Warning::
Images are 2.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.7 MB
Info::
59 HTTP requests
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
59 requests
0.67 g CO2 per page load
Images 2.7 MiB 86%
JavaScript 344.7 KiB 11%
CSS 74.2 KiB 2%
Other 20.7 KiB 1%
HTML 20.4 KiB 1%
Other 4.3 KiB 0%
Fonts 3.6 KiB 0%
Other 1.4 KiB 0%
Other 471 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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 (3.2 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2041ms total JS execution
FIX
2041ms total JS execution
Warning::
https://docs.github.com/en/pages: 620ms CPU time
Warning::
https://docs.github.com/_next/static/chunks/framew...: 467ms CPU time
Warning::
Unattributable: 415ms CPU time
Info::
https://docs.github.com/_next/static/chunks/pages/...: 176ms CPU time
Info::
https://docs.github.com/_next/static/chunks/main-1...: 137ms CPU time
Warning::
Third-party scripts: 2041ms (100% of total)

Main Thread Breakdown

Script Evaluation 40% Other 25% Style & Layout 22% Script Parsing & Compilation 7% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://docs.github.com/en/pages620ms14ms1ms3rd
https://docs.github.com/_next/static/chunks/framework-34c2c0424fa2c81d.js467ms417ms31ms3rd
Unattributable415ms11ms0ms3rd
https://docs.github.com/_next/static/chunks/pages/%5BversionId%5D/%5BproductId%5D-d7f86c948d3dfde6.js176ms166ms0ms3rd
https://docs.github.com/_next/static/chunks/main-1c2d02885fc63e43.js137ms120ms13ms3rd
https://pages.github.com/js/jquery.js105ms81ms10ms3rd
https://docs.github.com/_next/static/chunks/pages/_app-1e86da7da7032a99.js69ms41ms28ms3rd
https://docs.github.com/_next/static/chunks/356-50270be47535a244.js53ms3ms42ms3rd
D
Page Weight Inventory
Action
59 resources · 3.2 MB · 82 KB savings available
FIX
59 resources · 3.2 MB · 82 KB savings available
Warning::
Page weight 2.2 MB over 1MB target
Got: 3.2 MB Expected: ≤ 1 MB
Info::
~82 KB of savings available
Warning::
58 third-party resources (100% of weight)
Info::
3 resources over 200KB
59 resources · 3.2 MiB · 58 third-party 2.2 MiB over 1MB target
Image 86% · 2.8 MiB
JavaScript 11% · 350.1 KiB
CSS 2% · 78.5 KiB
Document 1% · 21.5 KiB
Font 0% · 3.6 KiB
Other 0% · 2.0 KiB

~81.7 KiB of savings available

Remove unused JavaScript: 81.7 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.

B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 2.7 MB
0 oversized -0 KB
16 legacy format
0 missing dimensions CLS risk
B
JS Bundles
23 scripts, 82 KB unused
REVIEW
23 scripts, 82 KB unused
Warning::
https://docs.github.com/_next/static/chunks/356-50...: 82 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 82 KB
82 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://docs.github.com/_next/static/chunks/356-50270be47535a244.js115 KB82 KB (71%)✓3rd
https://docs.github.com/_next/static/chunks/4539-152a524cc8af7463.js11 KB—✓3rd
https://docs.github.com/_next/static/chunks/9296-adce7d38c5ff8f82.js4 KB—✓3rd
https://docs.github.com/_next/static/chunks/framework-34c2c0424fa2c81d.js42 KB—✓3rd
https://docs.github.com/_next/static/chunks/main-1c2d02885fc63e43.js39 KB—✓3rd
https://docs.github.com/_next/static/chunks/pages/_app-1e86da7da7032a99.js27 KB—✓3rd
https://docs.github.com/_next/static/chunks/2911edaa-498f353f680a6bc0.js20 KB—✓3rd
https://docs.github.com/_next/static/chunks/3576-143b941f10f85efc.js3 KB—✓3rd
https://pages.github.com/js/application.js2 KB—✓3rd
https://docs.github.com/_next/static/chunks/2857-311d7761dc6243bb.js5 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
1 fonts (4 KB)
PASS
1 fonts (4 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

4 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.3 s LCP 10.1 shttps://pages.github.com/css/octicons.woffocticons.woff https://pages.github.com/css/octicons.woff — 3.6 KiB — 3 ms — font-display: swap
octicons.woff woff swap
Size 4 KB
Load time 3 ms
Start 115 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~1 KB and ~2 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
4
dns-prefetch
—
prefetch
—

4 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
59 requests over 1012ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.3 s LCP 10.1 shttps://github.io// https://github.io/ — 301 — 219 B — 24 ms — h2https://pages.github.com/pages.github.com/ https://pages.github.com/ — 200 — 4.1 KiB — 13 ms — h2https://pages.github.com/css/pages.csspages.github.com/css/pages.css https://pages.github.com/css/pages.css — 200 — 3.5 KiB — 5 ms — h2https://pages.github.com/images/logo.svgpages.github.com/images/logo.svg https://pages.github.com/images/logo.svg — 200 — 2.6 KiB — 131 ms — h2https://pages.github.com/images/slideshow/bootstrap.pngpages.github.com/images/slideshow/b... https://pages.github.com/images/slideshow/bootstrap.png — 200 — 153.6 KiB — 136 ms — h2https://pages.github.com/images/dashboard@2x.pngpages.github.com/images/dashboard@2... https://pages.github.com/images/dashboard@2x.png — 200 — 425.6 KiB — 149 ms — h2https://pages.github.com/images/desktop-demo@2x.gifpages.github.com/images/desktop-dem... https://pages.github.com/images/desktop-demo@2x.gif — 200 — 144.5 KiB — 16 ms — h2https://pages.github.com/images/repo-settings@2x.pngpages.github.com/images/repo-settin... https://pages.github.com/images/repo-settings@2x.png — 200 — 91.2 KiB — 136 ms — h2https://pages.github.com/js/jquery.jspages.github.com/js/jquery.js https://pages.github.com/js/jquery.js — 200 — 32.6 KiB — 26 ms — h2https://pages.github.com/js/application.jspages.github.com/js/application.js https://pages.github.com/js/application.js — 200 — 2.4 KiB — 25 ms — h2https://pages.github.com/images/launch-theme-chooser@2x.pngpages.github.com/images/launch-them... https://pages.github.com/images/launch-theme-chooser@2x.png — 200 — 94.8 KiB — 159 ms — h2https://pages.github.com/images/theme-chooser@2x.pngpages.github.com/images/theme-choos... https://pages.github.com/images/theme-chooser@2x.png — 200 — 403.2 KiB — 162 ms — h2https://pages.github.com/images/code-editor@2x.pngpages.github.com/images/code-editor... https://pages.github.com/images/code-editor@2x.png — 200 — 232.3 KiB — 30 ms — h2https://pages.github.com/images/commit-edits@2x.pngpages.github.com/images/commit-edit... https://pages.github.com/images/commit-edits@2x.png — 200 — 153.4 KiB — 29 ms — h2https://pages.github.com/images/new-create-file@2x.pngpages.github.com/images/new-create-... https://pages.github.com/images/new-create-file@2x.png — 200 — 115.2 KiB — 29 ms — h2https://pages.github.com/images/new-index-html@2x.pngpages.github.com/images/new-index-h... https://pages.github.com/images/new-index-html@2x.png — 200 — 73.7 KiB — 29 ms — h2https://pages.github.com/images/new-commit-file@2x.pngpages.github.com/images/new-commit-... https://pages.github.com/images/new-commit-file@2x.png — 200 — 112.6 KiB — 29 ms — h2https://pages.github.com/images/source-setting@2x.pngpages.github.com/images/source-sett... https://pages.github.com/images/source-setting@2x.png — 200 — 128.1 KiB — 160 ms — h2https://pages.github.com/images/user-repo@2x.pngpages.github.com/images/user-repo@2... https://pages.github.com/images/user-repo@2x.png — 200 — 156.0 KiB — 31 ms — h2https://pages.github.com/images/setup-in-desktop@2x.pngpages.github.com/images/setup-in-de... https://pages.github.com/images/setup-in-desktop@2x.png — 200 — 166.8 KiB — 31 ms — h2https://pages.github.com/css/octicons.woffpages.github.com/css/octicons.woff https://pages.github.com/css/octicons.woff — 200 — 3.6 KiB — 3 ms — h2https://pages.github.com/images/slideshow/yeoman.pngpages.github.com/images/slideshow/y... https://pages.github.com/images/slideshow/yeoman.png — 200 — 196.3 KiB — 134 ms — h2https://docs.github.com/pagesdocs.github.com/pages https://docs.github.com/pages — 302 — 1.1 KiB — 32 ms — h2https://pages.github.com/favicon.icopages.github.com/favicon.ico https://pages.github.com/favicon.ico — 200 — 1.3 KiB — 3 ms — h2https://docs.github.com/en/pagesdocs.github.com/en/pages https://docs.github.com/en/pages — 200 — 16.3 KiB — 4 ms — h2https://docs.github.com/_next/static/css/ac4d83606e4d71d9.cssdocs.github.com/_next/static/css/ac... https://docs.github.com/_next/static/css/ac4d83606e4d71d9.css — 200 — 44.9 KiB — 20 ms — h2https://docs.github.com/_next/static/css/05df8cbc51d01c10.cssdocs.github.com/_next/static/css/05... https://docs.github.com/_next/static/css/05df8cbc51d01c10.css — 200 — 15.5 KiB — 21 ms — h2https://docs.github.com/_next/static/css/f6fdb9f8433d2cff.cssdocs.github.com/_next/static/css/f6... https://docs.github.com/_next/static/css/f6fdb9f8433d2cff.css — 200 — 4.5 KiB — 16 ms — h2https://docs.github.com/_next/static/css/b0c5d7e38ae45bcf.cssdocs.github.com/_next/static/css/b0... https://docs.github.com/_next/static/css/b0c5d7e38ae45bcf.css — 200 — 5.9 KiB — 17 ms — h2https://docs.github.com/_next/static/chunks/webpack-75ac90a3459c1a35.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/webpack-75ac90a3459c1a35.js — 200 — 1.9 KiB — 16 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.3 s LCP 10.1 shttps://github.io// https://github.io/ — 301 — 219 B — 24 ms — h2https://pages.github.com/pages.github.com/ https://pages.github.com/ — 200 — 4.1 KiB — 13 ms — h2https://pages.github.com/css/pages.csspages.github.com/css/pages.css https://pages.github.com/css/pages.css — 200 — 3.5 KiB — 5 ms — h2https://pages.github.com/images/logo.svgpages.github.com/images/logo.svg https://pages.github.com/images/logo.svg — 200 — 2.6 KiB — 131 ms — h2https://pages.github.com/images/slideshow/bootstrap.pngpages.github.com/images/slideshow/b... https://pages.github.com/images/slideshow/bootstrap.png — 200 — 153.6 KiB — 136 ms — h2https://pages.github.com/images/dashboard@2x.pngpages.github.com/images/dashboard@2... https://pages.github.com/images/dashboard@2x.png — 200 — 425.6 KiB — 149 ms — h2https://pages.github.com/images/desktop-demo@2x.gifpages.github.com/images/desktop-dem... https://pages.github.com/images/desktop-demo@2x.gif — 200 — 144.5 KiB — 16 ms — h2https://pages.github.com/images/repo-settings@2x.pngpages.github.com/images/repo-settin... https://pages.github.com/images/repo-settings@2x.png — 200 — 91.2 KiB — 136 ms — h2https://pages.github.com/js/jquery.jspages.github.com/js/jquery.js https://pages.github.com/js/jquery.js — 200 — 32.6 KiB — 26 ms — h2https://pages.github.com/js/application.jspages.github.com/js/application.js https://pages.github.com/js/application.js — 200 — 2.4 KiB — 25 ms — h2https://pages.github.com/images/launch-theme-chooser@2x.pngpages.github.com/images/launch-them... https://pages.github.com/images/launch-theme-chooser@2x.png — 200 — 94.8 KiB — 159 ms — h2https://pages.github.com/images/theme-chooser@2x.pngpages.github.com/images/theme-choos... https://pages.github.com/images/theme-chooser@2x.png — 200 — 403.2 KiB — 162 ms — h2https://pages.github.com/images/code-editor@2x.pngpages.github.com/images/code-editor... https://pages.github.com/images/code-editor@2x.png — 200 — 232.3 KiB — 30 ms — h2https://pages.github.com/images/commit-edits@2x.pngpages.github.com/images/commit-edit... https://pages.github.com/images/commit-edits@2x.png — 200 — 153.4 KiB — 29 ms — h2https://pages.github.com/images/new-create-file@2x.pngpages.github.com/images/new-create-... https://pages.github.com/images/new-create-file@2x.png — 200 — 115.2 KiB — 29 ms — h2https://pages.github.com/images/new-index-html@2x.pngpages.github.com/images/new-index-h... https://pages.github.com/images/new-index-html@2x.png — 200 — 73.7 KiB — 29 ms — h2https://pages.github.com/images/new-commit-file@2x.pngpages.github.com/images/new-commit-... https://pages.github.com/images/new-commit-file@2x.png — 200 — 112.6 KiB — 29 ms — h2https://pages.github.com/images/source-setting@2x.pngpages.github.com/images/source-sett... https://pages.github.com/images/source-setting@2x.png — 200 — 128.1 KiB — 160 ms — h2https://pages.github.com/images/user-repo@2x.pngpages.github.com/images/user-repo@2... https://pages.github.com/images/user-repo@2x.png — 200 — 156.0 KiB — 31 ms — h2https://pages.github.com/images/setup-in-desktop@2x.pngpages.github.com/images/setup-in-de... https://pages.github.com/images/setup-in-desktop@2x.png — 200 — 166.8 KiB — 31 ms — h2https://pages.github.com/css/octicons.woffpages.github.com/css/octicons.woff https://pages.github.com/css/octicons.woff — 200 — 3.6 KiB — 3 ms — h2https://pages.github.com/images/slideshow/yeoman.pngpages.github.com/images/slideshow/y... https://pages.github.com/images/slideshow/yeoman.png — 200 — 196.3 KiB — 134 ms — h2https://docs.github.com/pagesdocs.github.com/pages https://docs.github.com/pages — 302 — 1.1 KiB — 32 ms — h2https://pages.github.com/favicon.icopages.github.com/favicon.ico https://pages.github.com/favicon.ico — 200 — 1.3 KiB — 3 ms — h2https://docs.github.com/en/pagesdocs.github.com/en/pages https://docs.github.com/en/pages — 200 — 16.3 KiB — 4 ms — h2https://docs.github.com/_next/static/css/ac4d83606e4d71d9.cssdocs.github.com/_next/static/css/ac... https://docs.github.com/_next/static/css/ac4d83606e4d71d9.css — 200 — 44.9 KiB — 20 ms — h2https://docs.github.com/_next/static/css/05df8cbc51d01c10.cssdocs.github.com/_next/static/css/05... https://docs.github.com/_next/static/css/05df8cbc51d01c10.css — 200 — 15.5 KiB — 21 ms — h2https://docs.github.com/_next/static/css/f6fdb9f8433d2cff.cssdocs.github.com/_next/static/css/f6... https://docs.github.com/_next/static/css/f6fdb9f8433d2cff.css — 200 — 4.5 KiB — 16 ms — h2https://docs.github.com/_next/static/css/b0c5d7e38ae45bcf.cssdocs.github.com/_next/static/css/b0... https://docs.github.com/_next/static/css/b0c5d7e38ae45bcf.css — 200 — 5.9 KiB — 17 ms — h2https://docs.github.com/_next/static/chunks/webpack-75ac90a3459c1a35.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/webpack-75ac90a3459c1a35.js — 200 — 1.9 KiB — 16 ms — h2https://docs.github.com/_next/static/chunks/framework-34c2c0424fa2c81d.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/framework-34c2c0424fa2c81d.js — 200 — 41.7 KiB — 30 ms — h2https://docs.github.com/_next/static/chunks/main-1c2d02885fc63e43.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/main-1c2d02885fc63e43.js — 200 — 39.3 KiB — 39 ms — h2https://docs.github.com/_next/static/chunks/pages/_app-1e86da7da7032a99.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/pages/_app-1e86da7da7032a99.js — 200 — 27.3 KiB — 53 ms — h2https://docs.github.com/_next/static/chunks/2911edaa-498f353f680a6bc0.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/2911edaa-498f353f680a6bc0.js — 200 — 20.4 KiB — 49 ms — h2https://docs.github.com/_next/static/chunks/3576-143b941f10f85efc.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/3576-143b941f10f85efc.js — 200 — 2.8 KiB — 47 ms — h2https://docs.github.com/_next/static/chunks/356-50270be47535a244.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/356-50270be47535a244.js — 200 — 115.1 KiB — 57 ms — h2https://docs.github.com/_next/static/chunks/2857-311d7761dc6243bb.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/2857-311d7761dc6243bb.js — 200 — 4.5 KiB — 37 ms — h2https://docs.github.com/_next/static/chunks/4539-152a524cc8af7463.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/4539-152a524cc8af7463.js — 200 — 11.4 KiB — 26 ms — h2https://docs.github.com/_next/static/chunks/7859-14c53e5bc40aec28.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/7859-14c53e5bc40aec28.js — 200 — 22.8 KiB — 48 ms — h2https://docs.github.com/_next/static/chunks/9296-adce7d38c5ff8f82.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/9296-adce7d38c5ff8f82.js — 200 — 4.0 KiB — 28 ms — h2https://docs.github.com/_next/static/chunks/471-9fc634eb2578c865.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/471-9fc634eb2578c865.js — 200 — 15.4 KiB — 29 ms — h2https://docs.github.com/_next/static/chunks/pages/%5BversionId%5D/%5BproductId%5D-d7f86c948d3dfde6.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/pages/%5BversionId%5D/%5BproductId%5D-d7f86c948d3dfde6.js — 200 — 293 B — 29 ms — h2https://docs.github.com/_next/static/-vrhx3Cwy3j58uXZbuBeG/_buildManifest.jsdocs.github.com/_next/static/-vrhx3... https://docs.github.com/_next/static/-vrhx3Cwy3j58uXZbuBeG/_buildManifest.js — 200 — 2.4 KiB — 50 ms — h2https://docs.github.com/_next/static/-vrhx3Cwy3j58uXZbuBeG/_ssgManifest.jsdocs.github.com/_next/static/-vrhx3... https://docs.github.com/_next/static/-vrhx3Cwy3j58uXZbuBeG/_ssgManifest.js — 200 — 290 B — 38 ms — h2https://docs.github.com/assets/images/banner-images/hero-1.webpdocs.github.com/assets/images/banne... https://docs.github.com/assets/images/banner-images/hero-1.webp — 200 — 153.3 KiB — 30 ms — h2https://docs.github.com/manifest.jsondocs.github.com/manifest.json https://docs.github.com/manifest.json — 200 — 1.4 KiB — 5 ms — h2https://collector.githubapp.com/docs/collectcollector.githubapp.com/docs/collec... https://collector.githubapp.com/docs/collect — 204 — 471 B — 348 ms — h2https://docs.github.com/assets/cb-345/images/site/favicon.pngdocs.github.com/assets/cb-345/image... https://docs.github.com/assets/cb-345/images/site/favicon.png — 200 — 7.9 KiB — 9 ms — 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https://docs.github.com/_next/static/chunks/9736-cf075495f91b121c.js — 200 — 0 B — 2 ms — h2https://docs.github.com/_next/static/chunks/pages/index-fbfb78e2f1bbbfb8.jsdocs.github.com/_next/static/chunks... https://docs.github.com/_next/static/chunks/pages/index-fbfb78e2f1bbbfb8.js — 200 — 0 B — 5 ms — h2https://docs.github.com/_next/static/css/5c0fe2e48e661691.cssdocs.github.com/_next/static/css/5c... https://docs.github.com/_next/static/css/5c0fe2e48e661691.css — 200 — 4.3 KiB — 4 ms — h2
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 2041ms · 273KB · $27/mo
docs.github.com
Other
Costly
Execution 620ms
Transfer 16 KB
Monthly Cost $8/mo
docs.github.com
Other
Costly
Execution 467ms
Transfer 42 KB
Monthly Cost $6/mo
Unattributable
Other
Costly
Execution 415ms
Transfer 0 KB
Monthly Cost $6/mo
docs.github.com
Other
Optional
Execution 176ms
Transfer 0 KB
Monthly Cost $2/mo
docs.github.com
Other
Optional
Execution 137ms
Transfer 39 KB
Monthly Cost $2/mo
pages.github.com
Other
Optional
Execution 105ms
Transfer 33 KB
Monthly Cost $1/mo
docs.github.com
Other
Optional
Execution 69ms
Transfer 27 KB
Monthly Cost $1/mo
docs.github.com
Other
Optional
Execution 53ms
Transfer 115 KB
Unused 71%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • docs.github.com adds 620ms and costs ~$8/month
  • docs.github.com adds 467ms and costs ~$6/month
  • Unattributable adds 415ms and costs ~$6/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

docs.github.com takes 620ms 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

docs.github.com takes 467ms 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

Unattributable takes 415ms 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

71% of docs.github.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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