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https://supremecourt.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
84
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
76
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

1.48 s

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

2.08 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.

0.000

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

1.48 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.

2.08 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
6 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 (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
9 scripts, 308 KB unused
FIX
9 scripts, 308 KB unused
Warning::
https://www.supremecourt.gov/Telerik.Web.UI.WebRes...: 140 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.supremecourt.gov/script/video.js: 135 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.go-mpulse.net/boomerang/T5V7Y-Q8M8U-BKDF...: 33 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 308 KB
308 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.supremecourt.gov/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d4.0.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aen-US%3a64455737-15dd-482f-b336-7074c5c53f91%3aea597d4b%3ab25378d2%3bTelerik.Web.UI%2c+Version%3d2024.2.513.462%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aen-US%3a4a06dcb0-7284-4255-b4c3-3ac41266023c%3a16e4e7cd%3aed16cbdc%3a33715776%3af7645509%3a59462f1%3aa51ee93e%3a88144a7a%3a24ee1bba%3ac128760b%3a19620875%3a874f8ea2%3af46195d3%3acda80b3%3ab2e06756%3a92fe8ea0%3afa31b949%3a4877f69a%3a490a9d4e%3abd8f85e4192 KB140 KB (73%)✓3rd
https://www.supremecourt.gov/script/video.js154 KB135 KB (88%)✓3rd
https://s.go-mpulse.net/boomerang/T5V7Y-Q8M8U-BKDFY-XWX7C-XPH3U57 KB33 KB (57%)✓3rd
https://www.supremecourt.gov/js/jquery-3.7.1.min.js30 KB—✓3rd
https://www.supremecourt.gov/js/bootstrap.min.js15 KB—✓3rd
https://www.supremecourt.gov/script/lightbox-2.6.min.js2 KB—✓3rd
https://www.supremecourt.gov/WebResource.axd?d=pynGkmcFUV13He1Qd6_TZGVbOm9V68oIIktI_W7Deic6ylHZhBcO0DPfFNaFgt6K56r_Ei_L1R3fS8qPL3MKAQ2&t=6389016277208987735 KB—✓3rd
https://www.supremecourt.gov/ScriptResource.axd?d=nv7asgRUU0tRmHNR2D6t1Mz6ZxijnNM9P9Qe9uddzuQox2IiojG5k5o-qBJoG7Dte7hbvoCbRBuRPeHeZyRwpX5LxES8-RopBt8-Md8MvNAZC1XK3f6rj17R5SQNmwNnKj_Fve60SE18feZoCEb2Yw2&t=ffffffffe66929005 KB—✓3rd
https://www.supremecourt.gov/WebResource.axd?d=JoBkLzP19aTuxbWOhHobYsa30HvStoJLmW0EUzyYHJhRhK8cvVYfDS9nHruKQgTxhM0JzZn77-vUVCXyHe4QLg2&t=6389016277208987731 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

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
1.1 MB transferred, 53 requests
REVIEW
1.1 MB transferred, 53 requests
Info::
Page weighs 2.8 MB (1.1 MB transferred)
Info::
Fonts are 246 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 246 KB
Info::
53 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
53 requests
0.23 g CO2 per page load
JavaScript 461.5 KiB 41%
Images 286.3 KiB 25%
Fonts 246.4 KiB 22%
CSS 78.8 KiB 7%
HTML 55.7 KiB 5%
Other 1.7 KiB 0%
Other 1.5 KiB 0%
Other 230 B 0%
0 2.4 MB 4.9 MB
Under budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

C
Image Optimization
Action
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://www.supremecourt.gov/images/live_icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.supremecourt.gov/images/calDate/day.gi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.supremecourt.gov/images/scous_seal.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.supremecourt.gov/images/courtroom_sm.j... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.supremecourt.gov/didyouknow/images/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 286 KB
0 oversized -0 KB
14 legacy format
5 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

B
Page Weight Inventory
53 resources · 1.1 MB · 308 KB savings available
REVIEW
53 resources · 1.1 MB · 308 KB savings available
Warning::
Page weight 108 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~308 KB of savings available
Warning::
52 third-party resources (100% of weight)
53 resources · 1.1 MiB · 52 third-party 108.2 KiB over 1MB target
JavaScript 41% · 461.5 KiB
Image 25% · 287.5 KiB
Font 22% · 246.4 KiB
CSS 7% · 78.8 KiB
Document 5% · 55.7 KiB
Other 0% · 2.3 KiB

~307.6 KiB of savings available

Remove unused JavaScript: 307.6 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
265ms total JS execution
PASS
265ms total JS execution
Info::
Unattributable: 106ms CPU time
Info::
https://www.supremecourt.gov/: 86ms CPU time
Info::
https://www.supremecourt.gov/Telerik.Web.UI.WebRes...: 73ms CPU time
Warning::
Third-party scripts: 265ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 30% Script Parsing & Compilation 14% Style & Layout 13% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
Unattributable106ms2ms0ms3rd
https://www.supremecourt.gov/86ms7ms2ms3rd
https://www.supremecourt.gov/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d4.0.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aen-US%3a64455737-15dd-482f-b336-7074c5c53f91%3aea597d4b%3ab25378d2%3bTelerik.Web.UI%2c+Version%3d2024.2.513.462%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aen-US%3a4a06dcb0-7284-4255-b4c3-3ac41266023c%3a16e4e7cd%3aed16cbdc%3a33715776%3af7645509%3a59462f1%3aa51ee93e%3a88144a7a%3a24ee1bba%3ac128760b%3a19620875%3a874f8ea2%3af46195d3%3acda80b3%3ab2e06756%3a92fe8ea0%3afa31b949%3a4877f69a%3a490a9d4e%3abd8f85e473ms47ms20ms3rd
A+
Font Loading
3 fonts (246 KB)
PASS
3 fonts (246 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

246 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.1 shttps://www.supremecourt.gov/fonts/SourceSansPro-Regular.ttfSourceSansPro-Regular.ttf https://www.supremecourt.gov/fonts/SourceSansPro-Regular.ttf — 67.9 KiB — 202 ms — font-display: swaphttps://www.supremecourt.gov/assets/fontawesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://www.supremecourt.gov/assets/fontawesome/webfonts/fa-solid-900.woff2 — 153.2 KiB — 218 ms — font-display: swaphttps://www.supremecourt.gov/fonts/Cinzel-Regular.ttfCinzel-Regular.ttf https://www.supremecourt.gov/fonts/Cinzel-Regular.ttf — 25.3 KiB — 208 ms — font-display: swap
SourceSansPro-Regular.ttf ttf swap
Size 68 KB
Load time 202 ms
Start 152 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
fa-solid-900.woff2 woff2 swap
Size 153 KB
Load time 218 ms
Start 153 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Cinzel-Regular.ttf ttf swap
Size 25 KB
Load time 208 ms
Start 153 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~105 KB and ~210 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
53 requests over 1059ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.1 shttps://supremecourt.gov// https://supremecourt.gov/ — 301 — 231 B — 29 ms — h2https://www.supremecourt.gov/www.supremecourt.gov/ https://www.supremecourt.gov/ — 200 — 55.7 KiB — 232 ms — h2https://www.supremecourt.gov/fonts/SourceSansPro-Regular.ttfwww.supremecourt.gov/fonts/SourceSa... https://www.supremecourt.gov/fonts/SourceSansPro-Regular.ttf — 200 — 67.9 KiB — 202 ms — h2https://www.supremecourt.gov/assets/fontawesome/webfonts/fa-solid-900.woff2www.supremecourt.gov/assets/fontawe... https://www.supremecourt.gov/assets/fontawesome/webfonts/fa-solid-900.woff2 — 200 — 153.2 KiB — 218 ms — h2https://www.supremecourt.gov/fonts/Cinzel-Regular.ttfwww.supremecourt.gov/fonts/Cinzel-R... https://www.supremecourt.gov/fonts/Cinzel-Regular.ttf — 200 — 25.3 KiB — 208 ms — h2https://www.supremecourt.gov/assets/fontawesome/css/fontawesome.csswww.supremecourt.gov/assets/fontawe... https://www.supremecourt.gov/assets/fontawesome/css/fontawesome.css — 200 — 18.5 KiB — 115 ms — h2https://www.supremecourt.gov/assets/fontawesome/css/brands.csswww.supremecourt.gov/assets/fontawe... https://www.supremecourt.gov/assets/fontawesome/css/brands.css — 200 — 5.3 KiB — 113 ms — h2https://www.supremecourt.gov/assets/fontawesome/css/solid.csswww.supremecourt.gov/assets/fontawe... https://www.supremecourt.gov/assets/fontawesome/css/solid.css — 200 — 638 B — 183 ms — h2https://www.supremecourt.gov/js/jquery-3.7.1.min.jswww.supremecourt.gov/js/jquery-3.7.... https://www.supremecourt.gov/js/jquery-3.7.1.min.js — 200 — 30.0 KiB — 209 ms — h2https://www.supremecourt.gov/js/bootstrap.min.jswww.supremecourt.gov/js/bootstrap.m... https://www.supremecourt.gov/js/bootstrap.min.js — 200 — 15.2 KiB — 209 ms — h2https://www.supremecourt.gov/css/bootstrap.min.csswww.supremecourt.gov/css/bootstrap.... https://www.supremecourt.gov/css/bootstrap.min.css — 200 — 16.5 KiB — 132 ms — h2https://www.supremecourt.gov/css/bootstrap-theme.min.csswww.supremecourt.gov/css/bootstrap-... https://www.supremecourt.gov/css/bootstrap-theme.min.css — 200 — 2.9 KiB — 113 ms — h2https://www.supremecourt.gov/styles/newBootStrap2.csswww.supremecourt.gov/styles/newBoot... https://www.supremecourt.gov/styles/newBootStrap2.css — 200 — 3.8 KiB — 115 ms — h2https://www.supremecourt.gov/styles/radlistbox.csswww.supremecourt.gov/styles/radlist... https://www.supremecourt.gov/styles/radlistbox.css — 200 — 601 B — 116 ms — h2https://www.supremecourt.gov/styles/slideshow1.csswww.supremecourt.gov/styles/slidesh... https://www.supremecourt.gov/styles/slideshow1.css — 200 — 963 B — 117 ms — h2https://www.supremecourt.gov/styles/Calendar.Web21.csswww.supremecourt.gov/styles/Calenda... https://www.supremecourt.gov/styles/Calendar.Web21.css — 200 — 1.8 KiB — 119 ms — h2https://www.supremecourt.gov/styles/lightbox.csswww.supremecourt.gov/styles/lightbo... https://www.supremecourt.gov/styles/lightbox.css — 200 — 1.4 KiB — 120 ms — h2https://www.supremecourt.gov/script/lightbox-2.6.min.jswww.supremecourt.gov/script/lightbo... https://www.supremecourt.gov/script/lightbox-2.6.min.js — 200 — 2.3 KiB — 205 ms — h2https://www.supremecourt.gov/styles/video-js.csswww.supremecourt.gov/styles/video-j... https://www.supremecourt.gov/styles/video-js.css — 200 — 10.9 KiB — 121 ms — h2https://www.supremecourt.gov/script/video.jswww.supremecourt.gov/script/video.j... https://www.supremecourt.gov/script/video.js — 200 — 153.6 KiB — 208 ms — h2https://www.supremecourt.gov/WebResource.axd?d=AvBWCtbpLXYjyyNienFv2AP4BqK-TzyR3MjpZLzth7Dy-EKWPOT8AsFIVDb565SZVzQWElvCCra4WWPGZhOJ4hUGI3O0BIkgn3xJJtAP8nzgI-4ENi8KIlTRMEB1y36mNQx9ypEvrDUklWxF-WgKhA2&t=638512084140000000www.supremecourt.gov/WebResource.ax... https://www.supremecourt.gov/WebResource.axd?d=AvBWCtbpLXYjyyNienFv2AP4BqK-TzyR3MjpZLzth7Dy-EKWPOT8AsFIVDb565SZVzQWElvCCra4WWPGZhOJ4hUGI3O0BIkgn3xJJtAP8nzgI-4ENi8KIlTRMEB1y36mNQx9ypEvrDUklWxF-WgKhA2&t=638512084140000000 — 200 — 1.9 KiB — 175 ms — h2https://www.supremecourt.gov/WebResource.axd?d=6d0ORl_GDQ8il0vfaye5YfLYYl9sEUhWsDW3PjsrKt6p3crKKdRWffnOoiOrLmUC5hA_15Q0_d7xySUJtj9S_vwmsAf6CXNLz83CEEPIFY7Rw0amkRwuhK7pRF27O59Er7uEl8jflEAujnsv7qvJJA2&t=638512084140000000www.supremecourt.gov/WebResource.ax... https://www.supremecourt.gov/WebResource.axd?d=6d0ORl_GDQ8il0vfaye5YfLYYl9sEUhWsDW3PjsrKt6p3crKKdRWffnOoiOrLmUC5hA_15Q0_d7xySUJtj9S_vwmsAf6CXNLz83CEEPIFY7Rw0amkRwuhK7pRF27O59Er7uEl8jflEAujnsv7qvJJA2&t=638512084140000000 — 200 — 705 B — 176 ms — h2https://www.supremecourt.gov/WebResource.axd?d=VdPoLqp1pEU6N0-IfFplZCUX0kq-KWC5tHDI0kFljmDfMnXIiELqrfX9sWcVICEU-5Qm4QosiFrtdK7B92pDreXUYG07YFeFMx2CLKPYhEeM8ww8t-odY1b2R7ujRJPh8mdEdcfKQ5jTo7GVN9PB_A2&t=638512084140000000www.supremecourt.gov/WebResource.ax... https://www.supremecourt.gov/WebResource.axd?d=VdPoLqp1pEU6N0-IfFplZCUX0kq-KWC5tHDI0kFljmDfMnXIiELqrfX9sWcVICEU-5Qm4QosiFrtdK7B92pDreXUYG07YFeFMx2CLKPYhEeM8ww8t-odY1b2R7ujRJPh8mdEdcfKQ5jTo7GVN9PB_A2&t=638512084140000000 — 200 — 6.2 KiB — 178 ms — h2https://www.supremecourt.gov/WebResource.axd?d=I2KMDU4OojcY5XW9Fb-hAbxpzcZLF251lyK3gs4-p850S_46qR-dpVRaAMFW-zFTXzZtUFhJJZJCfU_fecRqHmL-Gz4fKPIaCjPK9fTU2xpV9DDfA3T87x9akcpP0j9hiHMUJ6QPx6pViClDgMQJ_w2&t=638512084140000000www.supremecourt.gov/WebResource.ax... https://www.supremecourt.gov/WebResource.axd?d=I2KMDU4OojcY5XW9Fb-hAbxpzcZLF251lyK3gs4-p850S_46qR-dpVRaAMFW-zFTXzZtUFhJJZJCfU_fecRqHmL-Gz4fKPIaCjPK9fTU2xpV9DDfA3T87x9akcpP0j9hiHMUJ6QPx6pViClDgMQJ_w2&t=638512084140000000 — 200 — 1.3 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h3https://www.supremecourt.gov/images/calDate/sp17.gifwww.supremecourt.gov/images/calDate... https://www.supremecourt.gov/images/calDate/sp17.gif — 200 — 841 B — 120 ms — h3https://www.supremecourt.gov/images/prev.pngwww.supremecourt.gov/images/prev.pn... https://www.supremecourt.gov/images/prev.png — 200 — 1.4 KiB — 93 ms — h3https://www.supremecourt.gov/images/next.pngwww.supremecourt.gov/images/next.pn... https://www.supremecourt.gov/images/next.png — 200 — 1.3 KiB — 94 ms — h3https://www.supremecourt.gov/images/loading.gifwww.supremecourt.gov/images/loading... https://www.supremecourt.gov/images/loading.gif — 200 — 8.3 KiB — 94 ms — h3https://www.supremecourt.gov/images/close.pngwww.supremecourt.gov/images/close.p... https://www.supremecourt.gov/images/close.png — 200 — 304 B — 65 ms — h3https://c.go-mpulse.net/api/config.json?key=T5V7Y-Q8M8U-BKDFY-XWX7C-XPH3U&d=www.supremecourt.gov&t=5922684&v=1.632.0&sl=0&si=ucy7wqe5ys-tdv3nx&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,Angular,Backbone,Ember,History,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,LOGN&acao=&ak.ai=165722c.go-mpulse.net/api/config.json?key... https://c.go-mpulse.net/api/config.json?key=T5V7Y-Q8M8U-BKDFY-XWX7C-XPH3U&d=www.supremecourt.gov&t=5922684&v=1.632.0&sl=0&si=ucy7wqe5ys-tdv3nx&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,Angular,Backbone,Ember,History,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,LOGN&acao=&ak.ai=165722 — 200 — 930 B — 127 ms — h2https://www.supremecourt.gov/favicon.icowww.supremecourt.gov/favicon.ico https://www.supremecourt.gov/favicon.ico — 200 — 987 B — 65 ms — h3https://17de4c12.akstat.io/17de4c12.akstat.io/ https://17de4c12.akstat.io/ — 204 — 230 B — 60 ms — h2https://trial-eum-clientnsv4-s.akamaihd.net/eum/getdns.txt?c=pjsw42dvmtrial-eum-clientnsv4-s.akamaihd.net... https://trial-eum-clientnsv4-s.akamaihd.net/eum/getdns.txt?c=pjsw42dvm — 302 — 266 B — 21 ms — http/1.1https://trial-eum-clienttons-s.akamaihd.net/eum/getdns.txt?c=pjsw42dvmtrial-eum-clienttons-s.akamaihd.net... https://trial-eum-clienttons-s.akamaihd.net/eum/getdns.txt?c=pjsw42dvm — 302 — 270 B — 15 ms — http/1.1https://92-38-149-11_s-23-46-216-92_ts-1776805197-clienttons-s.akamaihd.net/eum/results.txt92-38-149-11_s-23-46-216-92_ts-1776... https://92-38-149-11_s-23-46-216-92_ts-1776805197-clienttons-s.akamaihd.net/eum/results.txt — 200 — 312 B — 36 ms — http/1.1https://lqtjkc3aca3wy2ph4vgq-pjsw42-b64023872-clientnsv4-s.akamaihd.net/eum/results.txtlqtjkc3aca3wy2ph4vgq-pjsw42-b640238... https://lqtjkc3aca3wy2ph4vgq-pjsw42-b64023872-clientnsv4-s.akamaihd.net/eum/results.txt — 200 — 312 B — 28 ms — http/1.1
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 265ms · 248KB · $2/mo
Unattributable
Other
Optional
Execution 106ms
Transfer 0 KB
Monthly Cost $1/mo
www.supremecourt.gov
Other
Optional
Execution 86ms
Transfer 56 KB
Monthly Cost $0/mo
www.supremecourt.gov
Other
Optional
Execution 73ms
Transfer 192 KB
Unused 73%
Monthly Cost $0/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

73% of www.supremecourt.gov'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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