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https://us.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
62
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
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.

2.19 s

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

12.13 s

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

302 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.

5.29 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.

12.67 s

Page Load Progression

588 ms
1.2 s
1.8 s
2.4 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
17
8 PASS 4 REVIEW 3 FIX
F
Page Weight Budget
Action
5.0 MB transferred, 38 requests
FIX
5.0 MB transferred, 38 requests
Critical::
Page weighs 5.9 MB (5.0 MB transferred)
Warning::
Images are 4.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.3 MB
Warning::
JavaScript is 597 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 597 KB
Info::
38 HTTP requests
Info::
Estimated 1.1 g CO2 per page load
5.0 MB / 2.4 MB budget
5.0 MB transferred
38 requests
1.1 g CO2 per page load
Images 4.3 MiB 86%
JavaScript 596.5 KiB 12%
CSS 101.1 KiB 2%
Fonts 19.6 KiB 0%
HTML 9.7 KiB 0%
Other 1.6 KiB 0%
Other 458 B 0%
Other 40 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

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

Why this matters

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

Source: web.dev

D
JS Execution Cost
Action
2151ms total JS execution
FIX
2151ms total JS execution
Warning::
Unattributable: 495ms CPU time
Warning::
https://us.org/assets/js/home.js?v=1.0.1: 384ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-L43H...: 267ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PZ7W...: 254ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WHP...: 216ms CPU time
Warning::
Third-party scripts: 1446ms (67% of total)

Main Thread Breakdown

Script Evaluation 39% Other 33% Style & Layout 14% Script Parsing & Compilation 9% Rendering 4%
ScriptTotalScriptingParse/CompileParty
Unattributable495ms82ms0ms3rd
https://us.org/assets/js/home.js?v=1.0.1384ms73ms1ms1st
https://www.googletagmanager.com/gtag/js?id=G-L43H196XDL&cx=c&_slc=1267ms212ms53ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PZ7W4HK7M7&cx=c&gtm=4e64h1h1254ms171ms59ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHPDQJT216ms146ms43ms3rd
https://www.google-analytics.com/analytics.js214ms63ms7ms3rd
https://us.org/175ms7ms2ms1st
https://us.org/assets/js/lib/modernizr.min.js?v=1.076ms35ms7ms1st
https://us.org/assets/js/lib/jquery-3.5.1.min.js70ms54ms12ms1st
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
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://us.org/assets/img/logos/usorg-white-single... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/oversized-icon-uso... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-seo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-global-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/logos/usorg-primary.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-dedicat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-unmatch... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-ideal-a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/domain-comparison-table-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://us.org/assets/img/icons/icon-usorg-no-rest... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 4.3 MB
0 oversized -0 KB
19 legacy format
10 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

C
JS Bundles
Action
10 scripts, 254 KB unused
REVIEW
10 scripts, 254 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PZ7W...: 66 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-L43H...: 66 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHP...: 63 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://us.org/assets/js/lib/jquery-3.5.1.min.js: 60 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 254 KB
254 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-PZ7W4HK7M7&cx=c&gtm=4e64h1h1156 KB66 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-L43H196XDL&cx=c&_slc=1147 KB66 KB (45%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHPDQJT125 KB63 KB (51%)✓3rd
https://us.org/assets/js/lib/jquery-3.5.1.min.js88 KB60 KB (68%)✓1st
https://us.org/assets/js/lib/modernizr.min.js?v=1.013 KB—✓1st
https://us.org/assets/js/main.js?v=1.0.15 KB—✗1st
https://us.org/assets/js/lib/underscore.min.js?v=1.0.116 KB—✓1st
https://us.org/assets/js/search.js?v=1.1.016 KB—✗1st
https://us.org/assets/js/home.js?v=1.0.110 KB—✗1st
https://www.google-analytics.com/analytics.js21 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

C
Page Weight Inventory
Action
38 resources · 5.0 MB · 254 KB savings available
REVIEW
38 resources · 5.0 MB · 254 KB savings available
Warning::
Page weight 4.0 MB over 1MB target
Got: 5.0 MB Expected: ≤ 1 MB
Info::
~254 KB of savings available
Info::
7 third-party resources (9% of weight)
Info::
5 resources over 200KB
38 resources · 5.0 MiB · 7 third-party 4.0 MiB over 1MB target
Image 86% · 4.3 MiB
JavaScript 12% · 596.5 KiB
CSS 2% · 101.1 KiB
Font 0% · 19.6 KiB
Document 0% · 9.7 KiB
Other 0% · 498 B

~254.4 KiB of savings available

Remove unused JavaScript: 254.4 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
9% third-party, 0 ms blocking
PASS
9% third-party, 0 ms blocking
Info::
Third-party code accounts for 9% of page weight (449.4 KiB of 5.0 MiB)
Info::
Third-party blocking time is low (0 ms)
91%
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
2 fonts (20 KB)
PASS
2 fonts (20 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

20 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.2 s LCP 12.1 shttps://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2albert-sans-v1-latin-90... https://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2 — 9.8 KiB — 99 ms — font-display: swaphttps://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2albert-sans-v1-latin-re... https://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-regular.woff2 — 9.7 KiB — 144 ms — font-display: swap
albert-sans-v1-latin-90... woff2 swap
Size 10 KB
Load time 99 ms
Start 642 ms
Risk FOUT — text flashes from fallback to web font
albert-sans-v1-latin-re... woff2 swap
Size 10 KB
Load time 144 ms
Start 643 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
38 requests over 1074ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.2 s LCP 12.1 shttps://us.org// https://us.org/ — 200 — 9.7 KiB — 196 ms — http/1.1https://us.org/assets/css/bootstrap-grid.min.css/assets/css/bootstrap-grid.min.css https://us.org/assets/css/bootstrap-grid.min.css — 200 — 50.5 KiB — 124 ms — http/1.1https://us.org/assets/css/style.css?v=1.1.3/assets/css/style.css?v=1.1.3 https://us.org/assets/css/style.css?v=1.1.3 — 200 — 50.6 KiB — 189 ms — http/1.1https://us.org/assets/js/lib/modernizr.min.js?v=1.0/assets/js/lib/modernizr.min.js?v=1... https://us.org/assets/js/lib/modernizr.min.js?v=1.0 — 200 — 12.7 KiB — 187 ms — http/1.1https://us.org/assets/img/logos/usorg-white-single-color.svg/assets/img/logos/usorg-white-singl... https://us.org/assets/img/logos/usorg-white-single-color.svg — 200 — 8.9 KiB — 194 ms — http/1.1https://us.org/assets/img/logos/usorg-primary.svg/assets/img/logos/usorg-primary.svg https://us.org/assets/img/logos/usorg-primary.svg — 200 — 22.6 KiB — 254 ms — http/1.1https://us.org/assets/img/icons/loader.svg/assets/img/icons/loader.svg https://us.org/assets/img/icons/loader.svg — 200 — 3.0 KiB — 64 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-dedicated-space.svg/assets/img/icons/icon-usorg-dedica... https://us.org/assets/img/icons/icon-usorg-dedicated-space.svg — 200 — 5.2 KiB — 68 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-unmatched-avail.svg/assets/img/icons/icon-usorg-unmatc... https://us.org/assets/img/icons/icon-usorg-unmatched-avail.svg — 200 — 5.3 KiB — 67 ms — http/1.1https://us.org/assets/js/lib/jquery-3.5.1.min.js/assets/js/lib/jquery-3.5.1.min.js https://us.org/assets/js/lib/jquery-3.5.1.min.js — 200 — 87.6 KiB — 194 ms — http/1.1https://us.org/assets/js/main.js?v=1.0.1/assets/js/main.js?v=1.0.1 https://us.org/assets/js/main.js?v=1.0.1 — 200 — 5.1 KiB — 107 ms — http/1.1https://www.googletagmanager.com/gtm.js?id=GTM-WHPDQJTwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-WHPDQJT — 200 — 125.4 KiB — 83 ms — h2https://us.org/assets/js/lib/underscore.min.js?v=1.0.1/assets/js/lib/underscore.min.js?v=... https://us.org/assets/js/lib/underscore.min.js?v=1.0.1 — 200 — 16.3 KiB — 83 ms — http/1.1https://us.org/assets/js/search.js?v=1.1.0/assets/js/search.js?v=1.1.0 https://us.org/assets/js/search.js?v=1.1.0 — 200 — 16.1 KiB — 73 ms — http/1.1https://us.org/assets/js/home.js?v=1.0.1/assets/js/home.js?v=1.0.1 https://us.org/assets/js/home.js?v=1.0.1 — 200 — 9.8 KiB — 67 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-no-restrictions.svg/assets/img/icons/icon-usorg-no-res... https://us.org/assets/img/icons/icon-usorg-no-restrictions.svg — 200 — 8.3 KiB — 104 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-seo.svg/assets/img/icons/icon-usorg-seo.sv... https://us.org/assets/img/icons/icon-usorg-seo.svg — 200 — 2.2 KiB — 77 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-global-trust.svg/assets/img/icons/icon-usorg-global... https://us.org/assets/img/icons/icon-usorg-global-trust.svg — 200 — 7.3 KiB — 65 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-ideal-all-types.svg/assets/img/icons/icon-usorg-ideal-... https://us.org/assets/img/icons/icon-usorg-ideal-all-types.svg — 200 — 4.9 KiB — 63 ms — http/1.1https://us.org/assets/img/icons/oversized-icon-usorg.svg/assets/img/icons/oversized-icon-us... https://us.org/assets/img/icons/oversized-icon-usorg.svg — 200 — 20.3 KiB — 65 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=G-PZ7W4HK7M7&cx=c&gtm=4e64h1h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-PZ7W4HK7M7&cx=c&gtm=4e64h1h1 — 200 — 155.6 KiB — 68 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 21 ms — h2https://us.org/assets/img/domain-comparison-table-desktop.png/assets/img/domain-comparison-table... https://us.org/assets/img/domain-comparison-table-desktop.png — 200 — 57.3 KiB — 127 ms — http/1.1https://us.org/assets/img/domain-comparison-table-mobile.png/assets/img/domain-comparison-table... https://us.org/assets/img/domain-comparison-table-mobile.png — 200 — 37.7 KiB — 124 ms — http/1.1https://us.org/assets/img/icons/usorg-mag-glass-location.svg/assets/img/icons/usorg-mag-glass-l... https://us.org/assets/img/icons/usorg-mag-glass-location.svg — 200 — 2.1 KiB — 64 ms — http/1.1https://us.org/assets/img/sites/aea_us_org.png/assets/img/sites/aea_us_org.png https://us.org/assets/img/sites/aea_us_org.png — 200 — 1.1 MiB — 298 ms — http/1.1https://us.org/assets/img/sites/cfth_us_org.png/assets/img/sites/cfth_us_org.png https://us.org/assets/img/sites/cfth_us_org.png — 200 — 913.7 KiB — 293 ms — http/1.1https://us.org/assets/img/sites/macaus_us_org.png/assets/img/sites/macaus_us_org.png https://us.org/assets/img/sites/macaus_us_org.png — 200 — 1.0 MiB — 317 ms — http/1.1https://www.google-analytics.com/j/collect?v=1&_v=j102&a=785908777&t=pageview&_s=1&dl=https%3A%2F%2Fus.org%2F&ul=en-us&dt=.US.ORG%20%7C%20The%20Open%20Domain%20for%20Purpose-Driven%20U.S.%20Organizations&sr=412x823&vp=412x823&_u=YEBAAEABAAAAACAAI~&jid=734643687&gjid=343841079&cid=1476604182.1776800333&tid=UA-263776482-8&_gid=1996052632.1776800333&_r=1&_slc=1&gtm=45He64h1h1n81WHPDQJTv9112432830za200zd9112432830&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115938465~115938468~117266400~117384405&z=1510140172www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=785908777&t=pageview&_s=1&dl=https%3A%2F%2Fus.org%2F&ul=en-us&dt=.US.ORG%20%7C%20The%20Open%20Domain%20for%20Purpose-Driven%20U.S.%20Organizations&sr=412x823&vp=412x823&_u=YEBAAEABAAAAACAAI~&jid=734643687&gjid=343841079&cid=1476604182.1776800333&tid=UA-263776482-8&_gid=1996052632.1776800333&_r=1&_slc=1&gtm=45He64h1h1n81WHPDQJTv9112432830za200zd9112432830&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115938465~115938468~117266400~117384405&z=1510140172 — 200 — 458 B — 18 ms — h2https://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2/assets/fonts/albert-sans/albert-sa... https://us.org/assets/fonts/albert-sans/albert-sans-v1-latin-900.woff2 — 200 — 9.8 KiB — 99 ms — http/1.1
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.2 s LCP 12.1 shttps://us.org// https://us.org/ — 200 — 9.7 KiB — 196 ms — http/1.1https://us.org/assets/css/bootstrap-grid.min.css/assets/css/bootstrap-grid.min.css https://us.org/assets/css/bootstrap-grid.min.css — 200 — 50.5 KiB — 124 ms — http/1.1https://us.org/assets/css/style.css?v=1.1.3/assets/css/style.css?v=1.1.3 https://us.org/assets/css/style.css?v=1.1.3 — 200 — 50.6 KiB — 189 ms — http/1.1https://us.org/assets/js/lib/modernizr.min.js?v=1.0/assets/js/lib/modernizr.min.js?v=1... https://us.org/assets/js/lib/modernizr.min.js?v=1.0 — 200 — 12.7 KiB — 187 ms — http/1.1https://us.org/assets/img/logos/usorg-white-single-color.svg/assets/img/logos/usorg-white-singl... https://us.org/assets/img/logos/usorg-white-single-color.svg — 200 — 8.9 KiB — 194 ms — http/1.1https://us.org/assets/img/logos/usorg-primary.svg/assets/img/logos/usorg-primary.svg https://us.org/assets/img/logos/usorg-primary.svg — 200 — 22.6 KiB — 254 ms — http/1.1https://us.org/assets/img/icons/loader.svg/assets/img/icons/loader.svg https://us.org/assets/img/icons/loader.svg — 200 — 3.0 KiB — 64 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-dedicated-space.svg/assets/img/icons/icon-usorg-dedica... https://us.org/assets/img/icons/icon-usorg-dedicated-space.svg — 200 — 5.2 KiB — 68 ms — http/1.1https://us.org/assets/img/icons/icon-usorg-unmatched-avail.svg/assets/img/icons/icon-usorg-unmatc... https://us.org/assets/img/icons/icon-usorg-unmatched-avail.svg — 200 — 5.3 KiB — 67 ms — http/1.1https://us.org/assets/js/lib/jquery-3.5.1.min.js/assets/js/lib/jquery-3.5.1.min.js https://us.org/assets/js/lib/jquery-3.5.1.min.js — 200 — 87.6 KiB — 194 ms — http/1.1https://us.org/assets/js/main.js?v=1.0.1/assets/js/main.js?v=1.0.1 https://us.org/assets/js/main.js?v=1.0.1 — 200 — 5.1 KiB — 107 ms — http/1.1https://www.googletagmanager.com/gtm.js?id=GTM-WHPDQJTwww.googletagmanager.com/gtm.js?id=... 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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
67% of JavaScript execution is third-party
First-party Third-party 1446ms · 449KB · €16/mo
Unattributable
Other
Costly
Execution 495ms
Transfer 0 KB
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 267ms
Transfer 147 KB
Unused 45%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 254ms
Transfer 156 KB
Unused 42%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 216ms
Transfer 125 KB
Unused 51%
Monthly Cost €2/mo
Google Analytics
Analytics
Costly
Execution 214ms
Transfer 21 KB
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • Unattributable adds 495ms and costs ~€5/month
  • Google Tag Manager adds 267ms and costs ~€3/month
  • Google Tag Manager adds 254ms and costs ~€3/month
  • Google Tag Manager adds 216ms and costs ~€2/month
  • Google Analytics adds 214ms and costs ~€2/month

67% 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 495ms 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 267ms 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 254ms 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 216ms 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

51% 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

Google Analytics takes 214ms 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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