Skip to content
https://home-assistant.io

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
3
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

967 ms

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

1.41 s

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.

0.003

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

967 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.

1.44 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
8 PASS 2 REVIEW 3 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 (1.4 MiB of 1.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
57 resources · 1.4 MB · 30 KB savings available
FIX
57 resources · 1.4 MB · 30 KB savings available
Warning::
Page weight 404 KB over 1MB target
Got: 1.4 MB Expected: ≤ 1 MB
Warning::
56 third-party resources (100% of weight)
57 resources · 1.4 MiB · 56 third-party 403.8 KiB over 1MB target
Image 84% · 1.2 MiB
JavaScript 6% · 92.6 KiB
Font 5% · 75.5 KiB
CSS 2% · 32.9 KiB
Document 2% · 24.1 KiB
Other 1% · 9.3 KiB

~29.6 KiB of savings available

Remove unused JavaScript: 29.6 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
Page Weight Budget
1.4 MB transferred, 57 requests
REVIEW
1.4 MB transferred, 57 requests
Info::
Page weighs 1.9 MB (1.4 MB transferred)
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Info::
57 HTTP requests
Info::
Estimated 0.29 g CO2 per page load
1.4 MB / 2.4 MB budget
1.4 MB transferred
57 requests
0.29 g CO2 per page load
Images 1.2 MiB 83%
JavaScript 92.6 KiB 6%
Fonts 75.5 KiB 5%
CSS 32.9 KiB 2%
HTML 24.1 KiB 2%
Other 10.9 KiB 1%
Other 8.3 KiB 1%
Other 495 B 0%
0 2.4 MB 4.9 MB
Under 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

C
Image Optimization
Action
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://www.home-assistant.io/images/press/tomshar... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/footer-logo-t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/arstech... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/sponsors/nabu... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/frontpage/her... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/frontpage/her... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/tweaker... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/troyhun... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/theverg... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/ct.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/frontpage/net... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/linux.c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/opensou... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/ltt.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/product... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.home-assistant.io/images/press/LinuxMa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 1.2 MB
0 oversized -0 KB
26 legacy format
16 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

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

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

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

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

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+
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+
JS Execution Cost
184ms total JS execution
PASS
184ms total JS execution
Info::
https://www.home-assistant.io/: 101ms CPU time
Info::
Unattributable: 84ms CPU time
Warning::
Third-party scripts: 184ms (100% of total)

Main Thread Breakdown

Other 41% Style & Layout 28% Script Evaluation 17% Parse HTML & CSS 7% Rendering 4% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.home-assistant.io/101ms4ms2ms3rd
Unattributable84ms1ms0ms3rd
A+
Font Loading
2 fonts (76 KB)
PASS
2 fonts (76 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

76 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 FCP 967 ms LCP 1.4 shttps://fonts.gstatic.com/s/instrumentsans/v4/pxicypc9vsFDm051Uf6KVwgkfoSbT2lBgGygpg.woff2pxicypc9vsFDm051Uf6KVwg... https://fonts.gstatic.com/s/instrumentsans/v4/pxicypc9vsFDm051Uf6KVwgkfoSbT2lBgGygpg.woff2 — 55.8 KiB — 67 ms — font-display: swaphttps://fonts.gstatic.com/s/figtree/v9/_Xms-HUzqDCFdgfMm4S9DaRvzig.woff2_Xms-HUzqDCFdgfMm4S9DaR... https://fonts.gstatic.com/s/figtree/v9/_Xms-HUzqDCFdgfMm4S9DaRvzig.woff2 — 19.7 KiB — 55 ms — font-display: swap
pxicypc9vsFDm051Uf6KVwg... woff2 swap
Size 56 KB
Load time 67 ms
Start 394 ms
Risk FOUT — text flashes from fallback to web font
_Xms-HUzqDCFdgfMm4S9DaR... woff2 swap
Size 20 KB
Load time 55 ms
Start 394 ms
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)
A+
JS Bundles
12 scripts, 30 KB unused
PASS
12 scripts, 30 KB unused
Warning::
https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/...: 30 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 30 KB
30 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/umd/index.min.js36 KB30 KB (83%)✓3rd
https://code.iconify.design/iconify-icon/2.1.0/iconify-icon.min.js9 KB—✓3rd
https://cdn.jsdelivr.net/npm/@justinribeiro/lite-youtube@1.3.1/lite-youtube.js3 KB—✓3rd
https://www.home-assistant.io/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js1 KB—✓3rd
https://www.home-assistant.io/javascripts/terminology_tooltip.js?e20ec01246c34f18bd926ceed25bc7421 KB—✓3rd
https://www.home-assistant.io/javascripts/prism.js?5d6619066a1fc5cd819a93c132b539ac18 KB—✓3rd
https://www.home-assistant.io/javascripts/prism-signature.js?c46f2dc6f8d4fd987db580bda61368b51 KB—✓3rd
https://www.home-assistant.io/javascripts/prism-jinja2.js?b7346561200c43c055e61149a77b31873 KB—✓3rd
https://www.home-assistant.io/javascripts/prism-template-links.js?7bedbf54ec266241edb843530c1119033 KB—✓3rd
https://www.home-assistant.io/javascripts/prism-doc-links.js?aecc2ca96596f960444d87dad9394ee34 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

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
57 requests over 570ms
INFO
0 ms 500 ms 1.0 s FCP 967 ms LCP 1.4 shttps://home-assistant.io// https://home-assistant.io/ — 301 — 617 B — 190 ms — h3https://www.home-assistant.io/www.home-assistant.io/ https://www.home-assistant.io/ — 200 — 24.1 KiB — 58 ms — h3https://cdn.jsdelivr.net/npm/@docsearch/css@3/dist/style.min.csscdn.jsdelivr.net/npm/@docsearch/css... https://cdn.jsdelivr.net/npm/@docsearch/css@3/dist/style.min.css — 200 — 3.7 KiB — 94 ms — h2https://www.home-assistant.io/stylesheets/prism.css?1304e8e8c717584921b418a0a8dca04bwww.home-assistant.io/stylesheets/p... https://www.home-assistant.io/stylesheets/prism.css?1304e8e8c717584921b418a0a8dca04b — 200 — 2.9 KiB — 34 ms — h3https://www.home-assistant.io/stylesheets/screen.css?9a7328a851ae2e395f23b5ff3663f74cwww.home-assistant.io/stylesheets/s... https://www.home-assistant.io/stylesheets/screen.css?9a7328a851ae2e395f23b5ff3663f74c — 200 — 25.2 KiB — 52 ms — h3https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=Instrument+Sans:ital,wdth,wght@0,99,400..700;1,99,400..700&fonts.googleapis.com/css2?family=Fi... https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=Instrument+Sans:ital,wdth,wght@0,99,400..700;1,99,400..700& — 200 — 1020 B — 91 ms — h2https://code.iconify.design/iconify-icon/2.1.0/iconify-icon.min.jscode.iconify.design/iconify-icon/2.... https://code.iconify.design/iconify-icon/2.1.0/iconify-icon.min.js — 200 — 9.2 KiB — 66 ms — h2https://www.home-assistant.io/images/frontpage/hero-github-logo.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero-github-logo.svg — 200 — 1.6 KiB — 36 ms — h3https://www.home-assistant.io/images/frontpage/hero-trophy.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero-trophy.svg — 200 — 1.5 KiB — 35 ms — h3https://www.home-assistant.io/images/frontpage/hero_screenshot.pngwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero_screenshot.png — 200 — 161.8 KiB — 79 ms — h3https://cdn.jsdelivr.net/npm/@justinribeiro/lite-youtube@1.3.1/lite-youtube.jscdn.jsdelivr.net/npm/@justinribeiro... https://cdn.jsdelivr.net/npm/@justinribeiro/lite-youtube@1.3.1/lite-youtube.js — 200 — 2.8 KiB — 34 ms — h2https://www.home-assistant.io/images/app-loading.webpwww.home-assistant.io/images/app-lo... https://www.home-assistant.io/images/app-loading.webp — 200 — 6.9 KiB — 31 ms — h3https://www.home-assistant.io/images/press/theverge.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/theverge.svg — 200 — 1.4 KiB — 29 ms — h3https://www.home-assistant.io/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.home-assistant.io/cdn-cgi/scrip... https://www.home-assistant.io/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 1016 B — 22 ms — h3https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/umd/index.min.jscdn.jsdelivr.net/npm/@docsearch/js@... https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/umd/index.min.js — 200 — 35.7 KiB — 4 ms — h2https://www.home-assistant.io/images/press/arstechnica.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/arstechnica.svg — 200 — 2.7 KiB — 25 ms — h3https://www.home-assistant.io/images/press/tweakers.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/tweakers.png — 200 — 5.1 KiB — 25 ms — h3https://www.home-assistant.io/images/press/ltt.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/ltt.svg — 200 — 1.4 KiB — 27 ms — h3https://www.home-assistant.io/images/press/troyhunt.jpgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/troyhunt.jpg — 200 — 8.2 KiB — 35 ms — h3https://www.home-assistant.io/images/press/tomshardware.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/tomshardware.svg — 200 — 2.3 KiB — 33 ms — h3https://www.home-assistant.io/images/press/producthunt.com.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/producthunt.com.png — 200 — 3.0 KiB — 44 ms — h3https://www.home-assistant.io/images/press/linux.com.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/linux.com.png — 200 — 2.3 KiB — 44 ms — h3https://www.home-assistant.io/images/press/opensource.com.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/opensource.com.svg — 200 — 2.3 KiB — 43 ms — h3https://www.home-assistant.io/images/press/LinuxMagazine.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/LinuxMagazine.png — 200 — 2.4 KiB — 43 ms — h3https://www.home-assistant.io/images/press/ct.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/ct.png — 200 — 12.8 KiB — 39 ms — h3https://www.home-assistant.io/images/sponsors/nabu_casa.svgwww.home-assistant.io/images/sponso... https://www.home-assistant.io/images/sponsors/nabu_casa.svg — 200 — 2.3 KiB — 48 ms — h3https://www.home-assistant.io/images/footer-logo-text.svgwww.home-assistant.io/images/footer... https://www.home-assistant.io/images/footer-logo-text.svg — 200 — 2.4 KiB — 48 ms — h3https://www.home-assistant.io/images/frontpage/netlify.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/netlify.svg — 200 — 8.4 KiB — 30 ms — h3https://www.home-assistant.io/javascripts/terminology_tooltip.js?e20ec01246c34f18bd926ceed25bc742www.home-assistant.io/javascripts/t... https://www.home-assistant.io/javascripts/terminology_tooltip.js?e20ec01246c34f18bd926ceed25bc742 — 200 — 1.4 KiB — 46 ms — h3https://www.home-assistant.io/javascripts/prism.js?5d6619066a1fc5cd819a93c132b539acwww.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism.js?5d6619066a1fc5cd819a93c132b539ac — 200 — 17.6 KiB — 45 ms — h3
0 ms 500 ms 1.0 s FCP 967 ms LCP 1.4 shttps://home-assistant.io// https://home-assistant.io/ — 301 — 617 B — 190 ms — h3https://www.home-assistant.io/www.home-assistant.io/ https://www.home-assistant.io/ — 200 — 24.1 KiB — 58 ms — h3https://cdn.jsdelivr.net/npm/@docsearch/css@3/dist/style.min.csscdn.jsdelivr.net/npm/@docsearch/css... https://cdn.jsdelivr.net/npm/@docsearch/css@3/dist/style.min.css — 200 — 3.7 KiB — 94 ms — h2https://www.home-assistant.io/stylesheets/prism.css?1304e8e8c717584921b418a0a8dca04bwww.home-assistant.io/stylesheets/p... https://www.home-assistant.io/stylesheets/prism.css?1304e8e8c717584921b418a0a8dca04b — 200 — 2.9 KiB — 34 ms — h3https://www.home-assistant.io/stylesheets/screen.css?9a7328a851ae2e395f23b5ff3663f74cwww.home-assistant.io/stylesheets/s... https://www.home-assistant.io/stylesheets/screen.css?9a7328a851ae2e395f23b5ff3663f74c — 200 — 25.2 KiB — 52 ms — h3https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=Instrument+Sans:ital,wdth,wght@0,99,400..700;1,99,400..700&fonts.googleapis.com/css2?family=Fi... https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=Instrument+Sans:ital,wdth,wght@0,99,400..700;1,99,400..700& — 200 — 1020 B — 91 ms — h2https://code.iconify.design/iconify-icon/2.1.0/iconify-icon.min.jscode.iconify.design/iconify-icon/2.... https://code.iconify.design/iconify-icon/2.1.0/iconify-icon.min.js — 200 — 9.2 KiB — 66 ms — h2https://www.home-assistant.io/images/frontpage/hero-github-logo.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero-github-logo.svg — 200 — 1.6 KiB — 36 ms — h3https://www.home-assistant.io/images/frontpage/hero-trophy.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero-trophy.svg — 200 — 1.5 KiB — 35 ms — h3https://www.home-assistant.io/images/frontpage/hero_screenshot.pngwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/hero_screenshot.png — 200 — 161.8 KiB — 79 ms — h3https://cdn.jsdelivr.net/npm/@justinribeiro/lite-youtube@1.3.1/lite-youtube.jscdn.jsdelivr.net/npm/@justinribeiro... https://cdn.jsdelivr.net/npm/@justinribeiro/lite-youtube@1.3.1/lite-youtube.js — 200 — 2.8 KiB — 34 ms — h2https://www.home-assistant.io/images/app-loading.webpwww.home-assistant.io/images/app-lo... https://www.home-assistant.io/images/app-loading.webp — 200 — 6.9 KiB — 31 ms — h3https://www.home-assistant.io/images/press/theverge.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/theverge.svg — 200 — 1.4 KiB — 29 ms — h3https://www.home-assistant.io/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.home-assistant.io/cdn-cgi/scrip... https://www.home-assistant.io/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 1016 B — 22 ms — h3https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/umd/index.min.jscdn.jsdelivr.net/npm/@docsearch/js@... https://cdn.jsdelivr.net/npm/@docsearch/js@3/dist/umd/index.min.js — 200 — 35.7 KiB — 4 ms — h2https://www.home-assistant.io/images/press/arstechnica.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/arstechnica.svg — 200 — 2.7 KiB — 25 ms — h3https://www.home-assistant.io/images/press/tweakers.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/tweakers.png — 200 — 5.1 KiB — 25 ms — h3https://www.home-assistant.io/images/press/ltt.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/ltt.svg — 200 — 1.4 KiB — 27 ms — h3https://www.home-assistant.io/images/press/troyhunt.jpgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/troyhunt.jpg — 200 — 8.2 KiB — 35 ms — h3https://www.home-assistant.io/images/press/tomshardware.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/tomshardware.svg — 200 — 2.3 KiB — 33 ms — h3https://www.home-assistant.io/images/press/producthunt.com.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/producthunt.com.png — 200 — 3.0 KiB — 44 ms — h3https://www.home-assistant.io/images/press/linux.com.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/linux.com.png — 200 — 2.3 KiB — 44 ms — h3https://www.home-assistant.io/images/press/opensource.com.svgwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/opensource.com.svg — 200 — 2.3 KiB — 43 ms — h3https://www.home-assistant.io/images/press/LinuxMagazine.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/LinuxMagazine.png — 200 — 2.4 KiB — 43 ms — h3https://www.home-assistant.io/images/press/ct.pngwww.home-assistant.io/images/press/... https://www.home-assistant.io/images/press/ct.png — 200 — 12.8 KiB — 39 ms — h3https://www.home-assistant.io/images/sponsors/nabu_casa.svgwww.home-assistant.io/images/sponso... https://www.home-assistant.io/images/sponsors/nabu_casa.svg — 200 — 2.3 KiB — 48 ms — h3https://www.home-assistant.io/images/footer-logo-text.svgwww.home-assistant.io/images/footer... https://www.home-assistant.io/images/footer-logo-text.svg — 200 — 2.4 KiB — 48 ms — h3https://www.home-assistant.io/images/frontpage/netlify.svgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/netlify.svg — 200 — 8.4 KiB — 30 ms — h3https://www.home-assistant.io/javascripts/terminology_tooltip.js?e20ec01246c34f18bd926ceed25bc742www.home-assistant.io/javascripts/t... https://www.home-assistant.io/javascripts/terminology_tooltip.js?e20ec01246c34f18bd926ceed25bc742 — 200 — 1.4 KiB — 46 ms — h3https://www.home-assistant.io/javascripts/prism.js?5d6619066a1fc5cd819a93c132b539acwww.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism.js?5d6619066a1fc5cd819a93c132b539ac — 200 — 17.6 KiB — 45 ms — h3https://www.home-assistant.io/javascripts/prism-signature.js?c46f2dc6f8d4fd987db580bda61368b5www.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism-signature.js?c46f2dc6f8d4fd987db580bda61368b5 — 200 — 1.4 KiB — 47 ms — h3https://www.home-assistant.io/javascripts/prism-jinja2.js?b7346561200c43c055e61149a77b3187www.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism-jinja2.js?b7346561200c43c055e61149a77b3187 — 200 — 2.6 KiB — 43 ms — h3https://www.home-assistant.io/javascripts/prism-template-links.js?7bedbf54ec266241edb843530c111903www.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism-template-links.js?7bedbf54ec266241edb843530c111903 — 200 — 3.1 KiB — 44 ms — h3https://www.home-assistant.io/javascripts/prism-doc-links.js?aecc2ca96596f960444d87dad9394ee3www.home-assistant.io/javascripts/p... https://www.home-assistant.io/javascripts/prism-doc-links.js?aecc2ca96596f960444d87dad9394ee3 — 200 — 3.6 KiB — 48 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 116 ms — h2https://www.home-assistant.io/images/home-assistant-logo-white.svgwww.home-assistant.io/images/home-a... https://www.home-assistant.io/images/home-assistant-logo-white.svg — 200 — 5.0 KiB — 41 ms — h3https://www.home-assistant.io/images/frontpage/sotoh-2026.webpwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/sotoh-2026.webp — 200 — 103.7 KiB — 52 ms — h3https://www.home-assistant.io/images/frontpage/community-card.webpwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/community-card.webp — 200 — 124.1 KiB — 63 ms — h3https://www.home-assistant.io/images/frontpage/zbt-2-frontpage.webpwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/zbt-2-frontpage.webp — 200 — 126.6 KiB — 65 ms — h3https://www.home-assistant.io/images/frontpage/zwa-2-frontpage.webpwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/zwa-2-frontpage.webp — 200 — 61.3 KiB — 59 ms — h3https://www.home-assistant.io/images/frontpage/voice-pe-frontpage.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/voice-pe-frontpage.jpg — 200 — 47.6 KiB — 59 ms — h3https://www.home-assistant.io/images/frontpage/green-frontpage.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/green-frontpage.jpg — 200 — 25.6 KiB — 55 ms — h3https://www.home-assistant.io/images/frontpage/feature-zbt1.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/feature-zbt1.jpg — 200 — 22.1 KiB — 57 ms — h3https://www.home-assistant.io/images/frontpage/yellow-frontpage.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/yellow-frontpage.jpg — 200 — 29.8 KiB — 54 ms — h3https://www.home-assistant.io/images/frontpage/feature-sotoh2025.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/feature-sotoh2025.jpg — 200 — 60.4 KiB — 59 ms — h3https://www.home-assistant.io/images/frontpage/merch-store.webpwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/merch-store.webp — 200 — 177.3 KiB — 65 ms — h3https://www.home-assistant.io/images/frontpage/feature-voice.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/feature-voice.jpg — 200 — 41.6 KiB — 62 ms — h3https://www.home-assistant.io/images/frontpage/energy-frontpage.jpgwww.home-assistant.io/images/frontp... https://www.home-assistant.io/images/frontpage/energy-frontpage.jpg — 200 — 125.4 KiB — 65 ms — h3https://www.home-assistant.io/images/footer-skyline.svgwww.home-assistant.io/images/footer... https://www.home-assistant.io/images/footer-skyline.svg — 200 — 3.6 KiB — 49 ms — h3https://fonts.gstatic.com/s/instrumentsans/v4/pxicypc9vsFDm051Uf6KVwgkfoSbT2lBgGygpg.woff2fonts.gstatic.com/s/instrumentsans/... https://fonts.gstatic.com/s/instrumentsans/v4/pxicypc9vsFDm051Uf6KVwgkfoSbT2lBgGygpg.woff2 — 200 — 55.8 KiB — 67 ms — h3https://fonts.gstatic.com/s/figtree/v9/_Xms-HUzqDCFdgfMm4S9DaRvzig.woff2fonts.gstatic.com/s/figtree/v9/_Xms... https://fonts.gstatic.com/s/figtree/v9/_Xms-HUzqDCFdgfMm4S9DaRvzig.woff2 — 200 — 19.7 KiB — 55 ms — h3https://api.iconify.design/mdi.json?icons=arrow-right%2Ccast-connected%2Ccellphone%2Cchevron-down%2Cchevron-right%2Ccode-braces%2Ccog%2Ccomment-processing-outline%2Cemail-newsletter%2Cgauge%2Clightbulb-variant-outline%2Cmicrophone%2Cnew-box%2Cnewspaper-variant-multiple%2Cnfc-variant%2Cpeople-group-outline%2Cpuzzle%2Crobot-happy%2Crobot-happy-outline%2Cshield-home-outline%2Csolar-power-variant%2Cview-dashboard%2Cview-gridapi.iconify.design/mdi.json?icons=a... https://api.iconify.design/mdi.json?icons=arrow-right%2Ccast-connected%2Ccellphone%2Cchevron-down%2Cchevron-right%2Ccode-braces%2Ccog%2Ccomment-processing-outline%2Cemail-newsletter%2Cgauge%2Clightbulb-variant-outline%2Cmicrophone%2Cnew-box%2Cnewspaper-variant-multiple%2Cnfc-variant%2Cpeople-group-outline%2Cpuzzle%2Crobot-happy%2Crobot-happy-outline%2Cshield-home-outline%2Csolar-power-variant%2Cview-dashboard%2Cview-grid — 200 — 3.5 KiB — 31 ms — h2https://api.iconify.design/simple-icons.json?icons=amazonalexa%2Cdiscord%2Cdiscourse%2Cgoogleassistant%2Chomeassistant%2Creddit%2Cyoutubeapi.iconify.design/simple-icons.jso... https://api.iconify.design/simple-icons.json?icons=amazonalexa%2Cdiscord%2Cdiscourse%2Cgoogleassistant%2Chomeassistant%2Creddit%2Cyoutube — 200 — 2.0 KiB — 29 ms — h2https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.jscdnjs.cloudflare.com/ajax/libs/clip... https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js — 200 — 3.5 KiB — 54 ms — h3https://api.iconify.design/simple-icons.json?icons=bluesky%2Cfacebook%2Cgithub%2Cinstagram%2Clinkedin%2Cmastodon%2Cxapi.iconify.design/simple-icons.jso... https://api.iconify.design/simple-icons.json?icons=bluesky%2Cfacebook%2Cgithub%2Cinstagram%2Clinkedin%2Cmastodon%2Cx — 200 — 2.7 KiB — 27 ms — h2https://www.home-assistant.io/cdn-cgi/rum?www.home-assistant.io/cdn-cgi/rum? https://www.home-assistant.io/cdn-cgi/rum? — 204 — 495 B — 21 ms — h3https://www.home-assistant.io/images/favicon.icowww.home-assistant.io/images/favico... https://www.home-assistant.io/images/favicon.ico — 200 — 10.3 KiB — 25 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 184ms · 24KB · €2/mo
www.home-assistant.io
Other
Optional
Execution 101ms
Transfer 24 KB
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 84ms
Transfer 0 KB
Monthly Cost €1/mo

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

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.

Send Feedback