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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
4
PASS
8
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.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

3.17 s

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

6.18 s

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

298 ms

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

0.005

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

5.68 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.

7.34 s

Page Load Progression

576 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.0 s
4.6 s
Checks
17
8 PASS 4 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 (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2064ms total JS execution
FIX
2064ms total JS execution
Warning::
https://home.unicode.org/: 806ms CPU time
Warning::
Unattributable: 504ms CPU time
Warning::
https://home.unicode.org/wp-includes/js/jquery/jqu...: 400ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-JP5G...: 206ms CPU time
Info::
https://www.google-analytics.com/analytics.js: 90ms CPU time
Warning::
Third-party scripts: 2064ms (100% of total)

Main Thread Breakdown

Script Evaluation 33% Other 28% Style & Layout 15% Parse HTML & CSS 14% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://home.unicode.org/806ms22ms13ms3rd
Unattributable504ms85ms0ms3rd
https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1400ms300ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JP5GS8YZK5&cx=c&_slc=1206ms159ms46ms3rd
https://www.google-analytics.com/analytics.js90ms66ms19ms3rd
https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/modernizr.js?ver=3.3.158ms35ms3ms3rd
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.
Info::
Last-Modified header present

No Cache-Control header

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

B
Page Weight Budget
1.2 MB transferred, 82 requests
REVIEW
1.2 MB transferred, 82 requests
Info::
Page weighs 3.1 MB (1.2 MB transferred)
Info::
82 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
82 requests
0.25 g CO2 per page load
Images 468.4 KiB 38%
JavaScript 404.8 KiB 33%
HTML 196.9 KiB 16%
Other 84.3 KiB 7%
Fonts 50.5 KiB 4%
CSS 24.7 KiB 2%
Other 895 B 0%
Other 549 B 0%
Other 465 B 0%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
3 images, 0 KB saveable
REVIEW
3 images, 0 KB saveable
Warning::
https://home.unicode.org/wp-content/uploads/2020/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
3 images 468 KB
0 oversized -0 KB
3 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

B
JS Bundles
59 scripts, 133 KB unused
REVIEW
59 scripts, 133 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JP5G...: 64 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://home.unicode.org/wp-content/themes/Avada/i...: 46 KB unused (98%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://home.unicode.org/wp-content/themes/Avada/i...: 24 KB unused (86%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 133 KB
133 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-JP5GS8YZK5&cx=c&_slc=1148 KB64 KB (43%)✓3rd
https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/swiper.js?ver=11.2.547 KB46 KB (98%)✓3rd
https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/jquery.ilightbox.js?ver=2.2.328 KB24 KB (86%)✓3rd
https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.133 KB—✓3rd
https://home.unicode.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.15 KB—✓3rd
https://home.unicode.org/wp-content/themes/unicode/submenu.js?ver=11 KB—✓3rd
https://home.unicode.org/wp-content/themes/unicode/hero.js?1776802806&ver=11 KB—✓3rd
https://home.unicode.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.49 KB—✓3rd
https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.js?ver=6.9.46 KB—✓3rd
https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/cssua.js?ver=2.1.282 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

C
Page Weight Inventory
Action
82 resources · 1.2 MB · 133 KB savings available
REVIEW
82 resources · 1.2 MB · 133 KB savings available
Warning::
Page weight 207 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~133 KB of savings available
Warning::
80 third-party resources (100% of weight)
Info::
1 resources over 200KB
82 resources · 1.2 MiB · 80 third-party 207.4 KiB over 1MB target
Image 45% · 552.7 KiB
JavaScript 33% · 404.8 KiB
Document 16% · 196.9 KiB
Font 4% · 50.5 KiB
CSS 2% · 24.7 KiB
Other 0% · 1.9 KiB

~132.9 KiB of savings available

Remove unused JavaScript: 132.9 KiB
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 (50 KB)
PASS
2 fonts (50 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

50 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.2 s LCP 6.2 shttps://fonts.gstatic.com/s/sourcesans3/v19/nwpStKy2OAdR1K-IwhWudF-R3w8aZejZ5HZV8Q.woff2nwpStKy2OAdR1K-IwhWudF-... https://fonts.gstatic.com/s/sourcesans3/v19/nwpStKy2OAdR1K-IwhWudF-R3w8aZejZ5HZV8Q.woff2 — 28.1 KiB — 32 ms — font-display: swaphttps://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/fonts/icomoon/awb-icons.woffawb-icons.woff https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/fonts/icomoon/awb-icons.woff — 22.3 KiB — 9 ms — font-display: swap
nwpStKy2OAdR1K-IwhWudF-... woff2 swap
Size 28 KB
Load time 32 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
awb-icons.woff woff swap
Size 22 KB
Load time 9 ms
Start 2.4 s
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 ~7 KB and ~14 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 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
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
82 requests over 2904ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.2 s LCP 6.2 shttps://unicode.org// https://unicode.org/ — 200 — 594 B — 294 ms — h2http://home.unicode.org/home.unicode.org/ http://home.unicode.org/ — 307 — 0 B — 4 ms — http/1.1https://home.unicode.org/home.unicode.org/ https://home.unicode.org/ — 200 — 196.3 KiB — 1.6 s — h2https://unicode.org/favicon.ico/favicon.ico https://unicode.org/favicon.ico — 200 — 1.2 KiB — 255 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/comment-form.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/comment-form.min.css?ver=5.13.2 — 200 — 624 B — 19 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/privacy.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/privacy.min.css?ver=5.13.2 — 200 — 291 B — 19 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/faqs.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/faqs.min.css?ver=5.13.2 — 200 — 481 B — 11 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/portfolio.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/portfolio.min.css?ver=5.13.2 — 200 — 1.7 KiB — 9 ms — h2https://home.unicode.org/wp-content/themes/Avada/style.css?ver=6.9.4home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/style.css?ver=6.9.4 — 200 — 524 B — 24 ms — h2https://home.unicode.org/wp-content/themes/unicode/style.css?1776802806&ver=1.0home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/style.css?1776802806&ver=1.0 — 200 — 4.0 KiB — 349 ms — h2https://home.unicode.org/wp-content/themes/unicode/characters.css?ver=6.9.4home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/characters.css?ver=6.9.4 — 200 — 432 B — 23 ms — h2https://home.unicode.org/wp-content/themes/Avada/assets/css/style.min.css?ver=7.13.2home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/assets/css/style.min.css?ver=7.13.2 — 200 — 15.2 KiB — 24 ms — h2https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.css?ver=6.9.4home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.css?ver=6.9.4 — 200 — 1.6 KiB — 10 ms — h2https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1home.unicode.org/wp-includes/js/jqu... https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 — 200 — 32.9 KiB — 25 ms — h2https://home.unicode.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1home.unicode.org/wp-includes/js/jqu... https://home.unicode.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 — 200 — 5.4 KiB — 12 ms — h2https://home.unicode.org/wp-content/uploads/2019/12/Unicode-Logo-Final-Blue-95x112.jpghome.unicode.org/wp-content/uploads... https://home.unicode.org/wp-content/uploads/2019/12/Unicode-Logo-Final-Blue-95x112.jpg — 200 — 10.6 KiB — 15 ms — h2https://home.unicode.org/wp-content/uploads/2020/08/play.pnghome.unicode.org/wp-content/uploads... https://home.unicode.org/wp-content/uploads/2020/08/play.png — 200 — 978 B — 11 ms — h2https://home.unicode.org/wp-content/themes/unicode/submenu.js?ver=1home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/submenu.js?ver=1 — 200 — 586 B — 5 ms — h2https://home.unicode.org/wp-content/themes/unicode/hero.js?1776802806&ver=1home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/hero.js?1776802806&ver=1 — 200 — 615 B — 347 ms — h2https://home.unicode.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.4home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.4 — 200 — 9.0 KiB — 4 ms — h2https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.js?ver=6.9.4home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.js?ver=6.9.4 — 200 — 6.3 KiB — 3 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/cssua.js?ver=2.1.28home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/cssua.js?ver=2.1.28 — 200 — 1.7 KiB — 18 ms — h2https://home.unicode.org/wp-content/plugins/fusion-builder/assets/js/min/general/fusion-animations.js?ver=3.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-builder/assets/js/min/general/fusion-animations.js?ver=3.13.2 — 200 — 1.1 KiB — 3 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/awb-tabs-widget.js?ver=3.13.2home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/awb-tabs-widget.js?ver=3.13.2 — 200 — 391 B — 2 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/awb-vertical-menu-widget.js?ver=3.13.2home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/awb-vertical-menu-widget.js?ver=3.13.2 — 200 — 685 B — 3 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/modernizr.js?ver=3.3.1home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/modernizr.js?ver=3.3.1 — 200 — 11.2 KiB — 4 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/fusion.js?ver=3.13.2home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/general/fusion.js?ver=3.13.2 — 200 — 2.0 KiB — 5 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/swiper.js?ver=11.2.5home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/swiper.js?ver=11.2.5 — 200 — 46.9 KiB — 4 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/bootstrap.transition.js?ver=3.3.6home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/bootstrap.transition.js?ver=3.3.6 — 200 — 543 B — 13 ms — h2https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/bootstrap.tooltip.js?ver=3.3.5home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/includes/lib/assets/min/js/library/bootstrap.tooltip.js?ver=3.3.5 — 200 — 4.3 KiB — 3 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.2 s LCP 6.2 shttps://unicode.org// https://unicode.org/ — 200 — 594 B — 294 ms — h2http://home.unicode.org/home.unicode.org/ http://home.unicode.org/ — 307 — 0 B — 4 ms — http/1.1https://home.unicode.org/home.unicode.org/ https://home.unicode.org/ — 200 — 196.3 KiB — 1.6 s — h2https://unicode.org/favicon.ico/favicon.ico https://unicode.org/favicon.ico — 200 — 1.2 KiB — 255 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/comment-form.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/comment-form.min.css?ver=5.13.2 — 200 — 624 B — 19 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/privacy.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/privacy.min.css?ver=5.13.2 — 200 — 291 B — 19 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/faqs.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/faqs.min.css?ver=5.13.2 — 200 — 481 B — 11 ms — h2https://home.unicode.org/wp-content/plugins/fusion-core/css/portfolio.min.css?ver=5.13.2home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/fusion-core/css/portfolio.min.css?ver=5.13.2 — 200 — 1.7 KiB — 9 ms — h2https://home.unicode.org/wp-content/themes/Avada/style.css?ver=6.9.4home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/style.css?ver=6.9.4 — 200 — 524 B — 24 ms — h2https://home.unicode.org/wp-content/themes/unicode/style.css?1776802806&ver=1.0home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/style.css?1776802806&ver=1.0 — 200 — 4.0 KiB — 349 ms — h2https://home.unicode.org/wp-content/themes/unicode/characters.css?ver=6.9.4home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/unicode/characters.css?ver=6.9.4 — 200 — 432 B — 23 ms — h2https://home.unicode.org/wp-content/themes/Avada/assets/css/style.min.css?ver=7.13.2home.unicode.org/wp-content/themes/... https://home.unicode.org/wp-content/themes/Avada/assets/css/style.min.css?ver=7.13.2 — 200 — 15.2 KiB — 24 ms — h2https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.css?ver=6.9.4home.unicode.org/wp-content/plugins... https://home.unicode.org/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.fancybox.min.css?ver=6.9.4 — 200 — 1.6 KiB — 10 ms — h2https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1home.unicode.org/wp-includes/js/jqu... https://home.unicode.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 — 200 — 32.9 KiB — 25 ms — 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INFO
100% of JavaScript execution is third-party
First-party Third-party 2064ms · 409KB · $12/mo
home.unicode.org
Other
Costly
Execution 806ms
Transfer 196 KB
Monthly Cost $5/mo
Unattributable
Other
Costly
Execution 504ms
Transfer 0 KB
Monthly Cost $3/mo
home.unicode.org
Other
Costly
Execution 400ms
Transfer 33 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 206ms
Transfer 148 KB
Unused 43%
Monthly Cost $1/mo
Google Analytics
Analytics
Optional
Execution 90ms
Transfer 21 KB
Monthly Cost $1/mo
home.unicode.org
Other
Optional
Execution 58ms
Transfer 11 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • home.unicode.org adds 806ms and costs ~$5/month
  • Unattributable adds 504ms and costs ~$3/month
  • home.unicode.org adds 400ms and costs ~$2/month
  • Google Tag Manager adds 206ms and costs ~$1/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

home.unicode.org takes 806ms 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 504ms 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

home.unicode.org takes 400ms 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 206ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

How third-party costs are calculated

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

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