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https://bsky.social

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
61
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
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.
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.

1.94 s

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

6.36 s

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

446 ms

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

0.000

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

5.42 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.

6.38 s

Page Load Progression

406 ms
812 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
17
10 PASS 3 REVIEW 2 FIX
D
JS Execution Cost
Action
2464ms total JS execution
FIX
2464ms total JS execution
Warning::
https://bsky.social/about: 698ms CPU time
Warning::
Unattributable: 606ms CPU time
Warning::
https://bsky.social/about/_next/static/chunks/fram...: 490ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-WTBZ...: 266ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-KZT...: 180ms CPU time
Info::
Third-party scripts: 1051ms (43% of total)

Main Thread Breakdown

Other 37% Script Evaluation 37% Style & Layout 12% Script Parsing & Compilation 7% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://bsky.social/about698ms14ms2ms1st
Unattributable606ms98ms0ms3rd
https://bsky.social/about/_next/static/chunks/framework-fa877b8be7542607.js490ms301ms34ms1st
https://www.googletagmanager.com/gtag/js?id=G-WTBZ3K80ET&cx=c&gtm=4e64k1266ms193ms72ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KZT6XPW7180ms144ms33ms3rd
https://bsky.social/about/_next/static/chunks/main-2e8f584bd8144e14.js100ms68ms18ms1st
https://bsky.social/about/_next/static/chunks/pages/_app-e6ca888df01112c8.js73ms41ms15ms1st
https://bsky.social/about/_next/static/chunks/pages/index-7a2c24e0482c8662.js52ms45ms6ms1st
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
Image Optimization
Action
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Warning::
https://bsky.social/about/the-washington-post.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/hero-social-card.webp is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/engadget.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/the-verge.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/the-new-york-times.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/techcrunch-logo-1.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/cnbc-1.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/techdirt-logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/associate-press.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/mash-logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/hero-reply-card.webp is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bsky.social/about/the-wall-street-journal-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
15 images 190 KB
0 oversized -0 KB
13 legacy format
12 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

C
JS Bundles
Action
14 scripts, 178 KB unused
REVIEW
14 scripts, 178 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-WTBZ...: 66 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KZT...: 65 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bsky.social/about/_next/static/chunks/fram...: 28 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bsky.social/about/_next/static/chunks/page...: 20 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 178 KB
178 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-WTBZ3K80ET&cx=c&gtm=4e64k1157 KB66 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KZT6XPW7118 KB65 KB (55%)✓3rd
https://bsky.social/about/_next/static/chunks/framework-fa877b8be7542607.js59 KB28 KB (48%)✓1st
https://bsky.social/about/_next/static/chunks/pages/_app-e6ca888df01112c8.js43 KB20 KB (48%)✓1st
https://bsky.social/about/_next/static/chunks/148-b2a33dd0a80d3cf0.js5 KB—✓1st
https://bsky.social/about/_next/static/chunks/pages/index-7a2c24e0482c8662.js18 KB—✓1st
https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_buildManifest.js1 KB—✓1st
https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_ssgManifest.js1 KB—✓1st
https://bsky.social/about/_next/static/chunks/webpack-705b2d5e34302617.js1 KB—✓1st
https://bsky.social/about/_next/static/chunks/main-2e8f584bd8144e14.js32 KB—✓1st

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

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

Green Hosting

No green hosting detected

A
Page Weight Budget
861 KB transferred, 40 requests
PASS
861 KB transferred, 40 requests
Info::
Page weighs 2.2 MB (861 KB transferred)
Info::
40 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
861 KB / 2.4 MB budget
861 KB transferred
40 requests
0.18 g CO2 per page load
JavaScript 435.5 KiB 51%
Images 189.9 KiB 22%
Other 152.5 KiB 18%
Fonts 47.9 KiB 6%
Other 13.1 KiB 2%
HTML 12.9 KiB 2%
CSS 8.7 KiB 1%
Other 771 B 0%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
32% third-party, 0 ms blocking
PASS
32% third-party, 0 ms blocking
Info::
Third-party code accounts for 32% of page weight (275.8 KiB of 861.4 KiB)
Info::
Third-party blocking time is low (0 ms)
68%
32%
First-party Third-party
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 (48 KB)
PASS
1 fonts (48 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

48 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.9 s LCP 6.4 shttps://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2e4af272ccee01ff0-s.p.woff2 https://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 47.9 KiB — 254 ms — font-display: swap
e4af272ccee01ff0-s.p.woff2 woff2 swap
Size 48 KB
Load time 254 ms
Start 373 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+
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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
—
preload
3
dns-prefetch
—
prefetch
2

5 resource hints configured

A+
Page Weight Inventory
40 resources · 861 KB · 178 KB savings available
PASS
40 resources · 861 KB · 178 KB savings available
Info::
Within 1MB page-weight target
Got: 861 KB
Info::
~178 KB of savings available
Info::
3 third-party resources (32% of weight)
40 resources · 861.4 KiB · 3 third-party Within 1MB page-weight target
JavaScript 52% · 445.8 KiB
Image 22% · 192.6 KiB
Other 18% · 151.5 KiB
Font 6% · 47.9 KiB
Document 2% · 13.0 KiB
CSS 1% · 10.5 KiB

~178.5 KiB of savings available

Remove unused JavaScript: 178.5 KiB
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
40 requests over 2664ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.9 s LCP 6.4 shttps://bsky.social// https://bsky.social/ — 302 — 85 B — 223 ms — h2https://bsky.social/about/about https://bsky.social/about — 200 — 12.9 KiB — 132 ms — h2https://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2/about/_next/static/media/e4af272cc... https://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 200 — 47.9 KiB — 254 ms — h2https://bsky.social/about/_next/static/css/3708d8d08802d372.css/about/_next/static/css/3708d8d0880... https://bsky.social/about/_next/static/css/3708d8d08802d372.css — 200 — 7.2 KiB — 249 ms — h2https://bsky.social/about/_next/static/css/0efdeb7e2d9d9047.css/about/_next/static/css/0efdeb7e2d9... https://bsky.social/about/_next/static/css/0efdeb7e2d9d9047.css — 200 — 1.5 KiB — 104 ms — h2https://bsky.social/about/hero-social-card.webp/about/hero-social-card.webp https://bsky.social/about/hero-social-card.webp — 200 — 38.9 KiB — 171 ms — h2https://bsky.social/about/hero-reply-card.webp/about/hero-reply-card.webp https://bsky.social/about/hero-reply-card.webp — 200 — 53.3 KiB — 250 ms — h2https://bsky.social/about/mash-logo.svg/about/mash-logo.svg https://bsky.social/about/mash-logo.svg — 200 — 2.2 KiB — 248 ms — h2https://bsky.social/about/the-new-york-times.svg/about/the-new-york-times.svg https://bsky.social/about/the-new-york-times.svg — 200 — 2.3 KiB — 248 ms — h2https://bsky.social/about/the-wall-street-journal-1.svg/about/the-wall-street-journal-1.sv... https://bsky.social/about/the-wall-street-journal-1.svg — 200 — 3.2 KiB — 247 ms — h2https://bsky.social/about/_next/static/chunks/webpack-705b2d5e34302617.js/about/_next/static/chunks/webpack-... https://bsky.social/about/_next/static/chunks/webpack-705b2d5e34302617.js — 200 — 1.4 KiB — 248 ms — h2https://bsky.social/about/_next/static/chunks/framework-fa877b8be7542607.js/about/_next/static/chunks/framewor... https://bsky.social/about/_next/static/chunks/framework-fa877b8be7542607.js — 200 — 58.7 KiB — 319 ms — h2https://bsky.social/about/_next/static/chunks/main-2e8f584bd8144e14.js/about/_next/static/chunks/main-2e8... https://bsky.social/about/_next/static/chunks/main-2e8f584bd8144e14.js — 200 — 32.1 KiB — 334 ms — h2https://bsky.social/about/_next/static/chunks/pages/_app-e6ca888df01112c8.js/about/_next/static/chunks/pages/_a... https://bsky.social/about/_next/static/chunks/pages/_app-e6ca888df01112c8.js — 200 — 42.5 KiB — 333 ms — h2https://bsky.social/about/_next/static/chunks/148-b2a33dd0a80d3cf0.js/about/_next/static/chunks/148-b2a3... https://bsky.social/about/_next/static/chunks/148-b2a33dd0a80d3cf0.js — 200 — 5.0 KiB — 322 ms — h2https://bsky.social/about/_next/static/chunks/pages/index-7a2c24e0482c8662.js/about/_next/static/chunks/pages/in... https://bsky.social/about/_next/static/chunks/pages/index-7a2c24e0482c8662.js — 200 — 17.7 KiB — 321 ms — h2https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_buildManifest.js/about/_next/static/Hgz5X1hWhsfzuSI... https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_buildManifest.js — 200 — 1.4 KiB — 325 ms — h2https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_ssgManifest.js/about/_next/static/Hgz5X1hWhsfzuSI... https://bsky.social/about/_next/static/Hgz5X1hWhsfzuSInEWy67/_ssgManifest.js — 200 — 697 B — 246 ms — h2https://bsky.social/about/the-washington-post.svg/about/the-washington-post.svg https://bsky.social/about/the-washington-post.svg — 200 — 4.4 KiB — 321 ms — h2https://bsky.social/about/techcrunch-logo-1.svg/about/techcrunch-logo-1.svg https://bsky.social/about/techcrunch-logo-1.svg — 200 — 734 B — 320 ms — h2https://bsky.social/about/engadget.svg/about/engadget.svg https://bsky.social/about/engadget.svg — 200 — 23.8 KiB — 323 ms — h2https://bsky.social/about/cnbc-1.svg/about/cnbc-1.svg https://bsky.social/about/cnbc-1.svg — 200 — 1.6 KiB — 321 ms — h2https://bsky.social/about/the-verge.svg/about/the-verge.svg https://bsky.social/about/the-verge.svg — 200 — 2.1 KiB — 323 ms — h2https://bsky.social/about/techdirt-logo.svg/about/techdirt-logo.svg https://bsky.social/about/techdirt-logo.svg — 200 — 2.0 KiB — 319 ms — h2https://bsky.social/about/associate-press.svg/about/associate-press.svg https://bsky.social/about/associate-press.svg — 200 — 4.5 KiB — 320 ms — h2https://bsky.social/about/images/site.webmanifest/about/images/site.webmanifest https://bsky.social/about/images/site.webmanifest — 200 — 771 B — 572 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-KZT6XPW7www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-KZT6XPW7 — 200 — 118.4 KiB — 90 ms — h2https://www.googletagmanager.com/gtag/js?id=G-WTBZ3K80ET&cx=c&gtm=4e64k1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-WTBZ3K80ET&cx=c&gtm=4e64k1 — 200 — 156.9 KiB — 69 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-WTBZ3K80ET&gtm=45je64k1v9176741482z89176816745za20gzb9176816745zd9176816745&_p=1776898227243&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1018758199.1776898228&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~117512543&sid=1776898227&sct=1&seg=0&dl=https%3A%2F%2Fbsky.social%2Fabout&dt=Bluesky&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1092www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-WTBZ3K80ET&gtm=45je64k1v9176741482z89176816745za20gzb9176816745zd9176816745&_p=1776898227243&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1018758199.1776898228&frm=0&pscdl=noapi&rcb=13&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~117512543&sid=1776898227&sct=1&seg=0&dl=https%3A%2F%2Fbsky.social%2Fabout&dt=Bluesky&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1092 — 204 — 546 B — 48 ms — h2https://bsky.social/about/images/favicon-32x32.png/about/images/favicon-32x32.png https://bsky.social/about/images/favicon-32x32.png — 200 — 2.8 KiB — 99 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.9 s LCP 6.4 shttps://bsky.social// https://bsky.social/ — 302 — 85 B — 223 ms — h2https://bsky.social/about/about https://bsky.social/about — 200 — 12.9 KiB — 132 ms — h2https://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2/about/_next/static/media/e4af272cc... https://bsky.social/about/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 200 — 47.9 KiB — 254 ms — h2https://bsky.social/about/_next/static/css/3708d8d08802d372.css/about/_next/static/css/3708d8d0880... https://bsky.social/about/_next/static/css/3708d8d08802d372.css — 200 — 7.2 KiB — 249 ms — h2https://bsky.social/about/_next/static/css/0efdeb7e2d9d9047.css/about/_next/static/css/0efdeb7e2d9... https://bsky.social/about/_next/static/css/0efdeb7e2d9d9047.css — 200 — 1.5 KiB — 104 ms — h2https://bsky.social/about/hero-social-card.webp/about/hero-social-card.webp https://bsky.social/about/hero-social-card.webp — 200 — 38.9 KiB — 171 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
43% of JavaScript execution is third-party
First-party Third-party 1051ms · 275KB · $14/mo
Unattributable
Other
Costly
Execution 606ms
Transfer 0 KB
Monthly Cost $8/mo
Google Tag Manager
Tag Manager
Costly
Execution 266ms
Transfer 157 KB
Unused 42%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Optional
Execution 180ms
Transfer 118 KB
Unused 55%
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • Unattributable adds 606ms and costs ~$8/month
  • Google Tag Manager adds 266ms and costs ~$4/month

43% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 606ms 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

Google Tag Manager takes 266ms 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

55% of Google Tag Manager'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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