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https://copyright.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
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.

851 ms

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

4.38 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.

0.001

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

851 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.

4.38 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
9 PASS 3 REVIEW 1 FIX
F
Page Weight Budget
Action
8.1 MB transferred, 47 requests
FIX
8.1 MB transferred, 47 requests
Critical::
Page weighs 9.0 MB (8.1 MB transferred)
Warning::
Images are 7.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.7 MB
Info::
47 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
8.1 MB / 2.4 MB budget
8.1 MB transferred
47 requests
1.7 g CO2 per page load
Images 7.7 MiB 95%
JavaScript 219.6 KiB 3%
Fonts 75.9 KiB 1%
Other 66.1 KiB 1%
CSS 36.0 KiB 0%
HTML 14.4 KiB 0%
Other 2.9 KiB 0%
Other 0 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

C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://copyright.gov/img/slider-ccb.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/intellectual-property-toolki... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/x-logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Search%20Our%20Records.j... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Register%20Your%20Works.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Copyright%20Law.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/YouTube.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/cp-logo2.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Recordation.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Fees.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/Who%20We%20Are.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/copyright-exhibit-tag.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/RSS.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://copyright.gov/img/LI-In-Bug.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 7.7 MB
0 oversized -0 KB
23 legacy format
14 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

B
JS Bundles
10 scripts, 97 KB unused
REVIEW
10 scripts, 97 KB unused
Warning::
https://cdn.loc.gov/loader/player/media.js: 73 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.loc.gov/loader/player/media.js: unminified — 13 KB could be saved
Warning::
https://assets.adobedtm.com/f94f5647937d/7b4a1bfef...: 24 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 97 KB
97 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.loc.gov/loader/player/media.js87 KB73 KB (83%)✗3rd
https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.js62 KB24 KB (39%)✓3rd
https://code.jquery.com/jquery-3.5.1.min.js31 KB—✓3rd
https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js8 KB—✓3rd
https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js17 KB—✓3rd
https://search.usa.gov/javascripts/remote.loader.js0 KB—✓3rd
https://cdn.loc.gov/loader/js/jwplayer-7.9.3/jwplayer.js65 KB—✓3rd
https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement.min.js13 KB—✓3rd
https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement_Module_ActivityMap.min.js2 KB—✓3rd
https://smon.copyright.gov/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&mid=81218167144323297912746786294292822352&ts=17768047083550 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

C
Page Weight Inventory
Action
47 resources · 8.1 MB · 97 KB savings available
REVIEW
47 resources · 8.1 MB · 97 KB savings available
Warning::
Page weight 7.1 MB over 1MB target
Got: 8.1 MB Expected: ≤ 1 MB
Info::
~97 KB of savings available
Info::
22 third-party resources (5% of weight)
Info::
14 resources over 200KB
47 resources · 8.1 MiB · 22 third-party 7.1 MiB over 1MB target
Image 95% · 7.7 MiB
JavaScript 3% · 284.7 KiB
Font 1% · 75.9 KiB
CSS 0% · 36.0 KiB
Document 0% · 14.4 KiB
Other 0% · 1.9 KiB

~96.9 KiB of savings available

Remove unused JavaScript: 96.9 KiB
A+
Third-Party Impact
5% third-party, 0 ms blocking
PASS
5% third-party, 0 ms blocking
Info::
Third-party code accounts for 5% of page weight (401.0 KiB of 8.1 MiB)
Info::
Third-party blocking time is low (0 ms)
95%
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+
JS Execution Cost
329ms total JS execution
PASS
329ms total JS execution
Info::
Unattributable: 116ms CPU time
Info::
https://copyright.gov/: 112ms CPU time
Info::
https://assets.adobedtm.com/f94f5647937d/7b4a1bfef...: 101ms CPU time
Warning::
Third-party scripts: 217ms (66% of total)

Main Thread Breakdown

Script Evaluation 37% Other 34% Style & Layout 16% Script Parsing & Compilation 6% Rendering 3% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable116ms2ms0ms3rd
https://copyright.gov/112ms2ms1ms1st
https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.js101ms85ms10ms3rd
A+
Font Loading
1 fonts (76 KB)
PASS
1 fonts (76 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

76 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 FCP 851 ms LCP 4.4 shttps://stackpath.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0fontawesome-webfont.woff2 https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0 — 75.9 KiB — 26 ms — font-display: swap
fontawesome-webfont.woff2 woff2 swap
Size 76 KB
Load time 26 ms
Start 257 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A+
HTTP Caching
max-age=14400 (4 hours)
PASS
max-age=14400 (4 hours)
Info::
Cache-Control header is set
Got: public, max-age=14400
Info::
Effective TTL: 4 hours (max-age=14400)
Info::
Last-Modified header present
Cache-Control

public, max-age=14400

DirectiveValueMeaning
public—Any cache may store this response
max-age14400Cache for 4 hours
Effective TTL: 14400 seconds
Network Waterfall
47 requests over 787ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 851 ms LCP 4.4 shttps://copyright.gov// https://copyright.gov/ — 200 — 11.2 KiB — 41 ms — h2https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.cssstackpath.bootstrapcdn.com/bootstra... https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css — 200 — 24.8 KiB — 49 ms — h3https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.cssstackpath.bootstrapcdn.com/font-awe... https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css — 200 — 7.4 KiB — 41 ms — h3https://copyright.gov/css/styles.css/css/styles.css https://copyright.gov/css/styles.css — 200 — 1.5 KiB — 23 ms — h2https://code.jquery.com/jquery-3.5.1.min.jscode.jquery.com/jquery-3.5.1.min.js https://code.jquery.com/jquery-3.5.1.min.js — 200 — 30.5 KiB — 34 ms — h2https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.jscdn.jsdelivr.net/npm/popper.js@1.16... https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js — 200 — 8.2 KiB — 40 ms — h2https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.jsstackpath.bootstrapcdn.com/bootstra... https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js — 200 — 16.7 KiB — 49 ms — h3https://cdn.loc.gov/loader/player/media.jscdn.loc.gov/loader/player/media.js https://cdn.loc.gov/loader/player/media.js — 200 — 87.4 KiB — 81 ms — h2https://copyright.gov/img/cp-logo2.png/img/cp-logo2.png https://copyright.gov/img/cp-logo2.png — 200 — 7.3 KiB — 18 ms — h2https://copyright.gov/img/carousel-1.jpg/img/carousel-1.jpg https://copyright.gov/img/carousel-1.jpg — 200 — 593.5 KiB — 53 ms — h2https://copyright.gov/registration/gr2d/images/GR2D-HomePageSlider.jpg/registration/gr2d/images/GR2D-Home... https://copyright.gov/registration/gr2d/images/GR2D-HomePageSlider.jpg — 200 — 908.2 KiB — 68 ms — h2https://copyright.gov/img/CPRS-slider-image.jpg/img/CPRS-slider-image.jpg https://copyright.gov/img/CPRS-slider-image.jpg — 200 — 741.4 KiB — 69 ms — h2https://cdn.loc.gov/loader/css/style.csscdn.loc.gov/loader/css/style.css https://cdn.loc.gov/loader/css/style.css — 200 — 2.3 KiB — 49 ms — h2https://copyright.gov/intellectual-property-toolkits/images/IPToolkits-HomePageSlider.jpg/intellectual-property-toolkits/ima... https://copyright.gov/intellectual-property-toolkits/images/IPToolkits-HomePageSlider.jpg — 200 — 756.5 KiB — 82 ms — h2https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.jsassets.adobedtm.com/f94f5647937d/7b... https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.js — 200 — 62.2 KiB — 32 ms — h2https://copyright.gov/img/slider-ccb.jpg/img/slider-ccb.jpg https://copyright.gov/img/slider-ccb.jpg — 200 — 823.5 KiB — 198 ms — h2https://copyright.gov/img/slider-strategic-plan-2022.jpg/img/slider-strategic-plan-2022.jpg https://copyright.gov/img/slider-strategic-plan-2022.jpg — 200 — 348.8 KiB — 97 ms — h2https://copyright.gov/img/Brushes.png/img/Brushes.png https://copyright.gov/img/Brushes.png — 200 — 147.9 KiB — 112 ms — h2https://copyright.gov/img/Search%20Our%20Records.jpg/img/Search%20Our%20Records.jpg https://copyright.gov/img/Search%20Our%20Records.jpg — 200 — 427.8 KiB — 128 ms — h2https://copyright.gov/img/Register%20Your%20Works.jpg/img/Register%20Your%20Works.jpg https://copyright.gov/img/Register%20Your%20Works.jpg — 200 — 473.0 KiB — 162 ms — h2https://copyright.gov/img/Recordation.jpg/img/Recordation.jpg https://copyright.gov/img/Recordation.jpg — 200 — 331.6 KiB — 147 ms — h2https://copyright.gov/img/Copyright%20Law.jpg/img/Copyright%20Law.jpg https://copyright.gov/img/Copyright%20Law.jpg — 200 — 419.3 KiB — 220 ms — h2https://search.usa.gov/javascripts/remote.loader.jssearch.usa.gov/javascripts/remote.l... https://search.usa.gov/javascripts/remote.loader.js — -1 — 0 B — 108 ms — https://copyright.gov/img/Who%20We%20Are.jpg/img/Who%20We%20Are.jpg https://copyright.gov/img/Who%20We%20Are.jpg — 200 — 520.5 KiB — 233 ms — h2https://copyright.gov/img/Fees.jpg/img/Fees.jpg https://copyright.gov/img/Fees.jpg — 200 — 384.0 KiB — 240 ms — h2https://copyright.gov/img/copyright-exhibit-tag.png/img/copyright-exhibit-tag.png https://copyright.gov/img/copyright-exhibit-tag.png — 200 — 285.1 KiB — 247 ms — h2https://copyright.gov/intellectual-property-toolkits/images/IPToolkit-Homepage-Graphic.jpg/intellectual-property-toolkits/ima... https://copyright.gov/intellectual-property-toolkits/images/IPToolkit-Homepage-Graphic.jpg — 200 — 545.3 KiB — 259 ms — h2https://copyright.gov/img/RSS.png/img/RSS.png https://copyright.gov/img/RSS.png — 200 — 2.3 KiB — 246 ms — h2https://copyright.gov/img/x-logo.png/img/x-logo.png https://copyright.gov/img/x-logo.png — 200 — 100.8 KiB — 246 ms — h2https://copyright.gov/img/YouTube.png/img/YouTube.png https://copyright.gov/img/YouTube.png — 200 — 1.4 KiB — 246 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 851 ms LCP 4.4 shttps://copyright.gov// https://copyright.gov/ — 200 — 11.2 KiB — 41 ms — h2https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.cssstackpath.bootstrapcdn.com/bootstra... https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css — 200 — 24.8 KiB — 49 ms — h3https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.cssstackpath.bootstrapcdn.com/font-awe... https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css — 200 — 7.4 KiB — 41 ms — h3https://copyright.gov/css/styles.css/css/styles.css https://copyright.gov/css/styles.css — 200 — 1.5 KiB — 23 ms — h2https://code.jquery.com/jquery-3.5.1.min.jscode.jquery.com/jquery-3.5.1.min.js https://code.jquery.com/jquery-3.5.1.min.js — 200 — 30.5 KiB — 34 ms — h2https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.jscdn.jsdelivr.net/npm/popper.js@1.16... https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js — 200 — 8.2 KiB — 40 ms — h2https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.jsstackpath.bootstrapcdn.com/bootstra... https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js — 200 — 16.7 KiB — 49 ms — h3https://cdn.loc.gov/loader/player/media.jscdn.loc.gov/loader/player/media.js https://cdn.loc.gov/loader/player/media.js — 200 — 87.4 KiB — 81 ms — h2https://copyright.gov/img/cp-logo2.png/img/cp-logo2.png https://copyright.gov/img/cp-logo2.png — 200 — 7.3 KiB — 18 ms — h2https://copyright.gov/img/carousel-1.jpg/img/carousel-1.jpg https://copyright.gov/img/carousel-1.jpg — 200 — 593.5 KiB — 53 ms — h2https://copyright.gov/registration/gr2d/images/GR2D-HomePageSlider.jpg/registration/gr2d/images/GR2D-Home... https://copyright.gov/registration/gr2d/images/GR2D-HomePageSlider.jpg — 200 — 908.2 KiB — 68 ms — h2https://copyright.gov/img/CPRS-slider-image.jpg/img/CPRS-slider-image.jpg https://copyright.gov/img/CPRS-slider-image.jpg — 200 — 741.4 KiB — 69 ms — h2https://cdn.loc.gov/loader/css/style.csscdn.loc.gov/loader/css/style.css https://cdn.loc.gov/loader/css/style.css — 200 — 2.3 KiB — 49 ms — h2https://copyright.gov/intellectual-property-toolkits/images/IPToolkits-HomePageSlider.jpg/intellectual-property-toolkits/ima... https://copyright.gov/intellectual-property-toolkits/images/IPToolkits-HomePageSlider.jpg — 200 — 756.5 KiB — 82 ms — h2https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.jsassets.adobedtm.com/f94f5647937d/7b... https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.js — 200 — 62.2 KiB — 32 ms — h2https://copyright.gov/img/slider-ccb.jpg/img/slider-ccb.jpg https://copyright.gov/img/slider-ccb.jpg — 200 — 823.5 KiB — 198 ms — h2https://copyright.gov/img/slider-strategic-plan-2022.jpg/img/slider-strategic-plan-2022.jpg https://copyright.gov/img/slider-strategic-plan-2022.jpg — 200 — 348.8 KiB — 97 ms — h2https://copyright.gov/img/Brushes.png/img/Brushes.png https://copyright.gov/img/Brushes.png — 200 — 147.9 KiB — 112 ms — h2https://copyright.gov/img/Search%20Our%20Records.jpg/img/Search%20Our%20Records.jpg https://copyright.gov/img/Search%20Our%20Records.jpg — 200 — 427.8 KiB — 128 ms — h2https://copyright.gov/img/Register%20Your%20Works.jpg/img/Register%20Your%20Works.jpg https://copyright.gov/img/Register%20Your%20Works.jpg — 200 — 473.0 KiB — 162 ms — h2https://copyright.gov/img/Recordation.jpg/img/Recordation.jpg https://copyright.gov/img/Recordation.jpg — 200 — 331.6 KiB — 147 ms — h2https://copyright.gov/img/Copyright%20Law.jpg/img/Copyright%20Law.jpg https://copyright.gov/img/Copyright%20Law.jpg — 200 — 419.3 KiB — 220 ms — h2https://search.usa.gov/javascripts/remote.loader.jssearch.usa.gov/javascripts/remote.l... https://search.usa.gov/javascripts/remote.loader.js — -1 — 0 B — 108 ms — https://copyright.gov/img/Who%20We%20Are.jpg/img/Who%20We%20Are.jpg https://copyright.gov/img/Who%20We%20Are.jpg — 200 — 520.5 KiB — 233 ms — h2https://copyright.gov/img/Fees.jpg/img/Fees.jpg https://copyright.gov/img/Fees.jpg — 200 — 384.0 KiB — 240 ms — h2https://copyright.gov/img/copyright-exhibit-tag.png/img/copyright-exhibit-tag.png https://copyright.gov/img/copyright-exhibit-tag.png — 200 — 285.1 KiB — 247 ms — h2https://copyright.gov/intellectual-property-toolkits/images/IPToolkit-Homepage-Graphic.jpg/intellectual-property-toolkits/ima... https://copyright.gov/intellectual-property-toolkits/images/IPToolkit-Homepage-Graphic.jpg — 200 — 545.3 KiB — 259 ms — h2https://copyright.gov/img/RSS.png/img/RSS.png https://copyright.gov/img/RSS.png — 200 — 2.3 KiB — 246 ms — h2https://copyright.gov/img/x-logo.png/img/x-logo.png https://copyright.gov/img/x-logo.png — 200 — 100.8 KiB — 246 ms — h2https://copyright.gov/img/YouTube.png/img/YouTube.png https://copyright.gov/img/YouTube.png — 200 — 1.4 KiB — 246 ms — h2https://copyright.gov/img/LI-In-Bug.png/img/LI-In-Bug.png https://copyright.gov/img/LI-In-Bug.png — 200 — 6.0 KiB — 245 ms — h2https://copyright.gov/img/chevron-arrow-down.png/img/chevron-arrow-down.png https://copyright.gov/img/chevron-arrow-down.png — 200 — 30.6 KiB — 189 ms — h2data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' vie…www.w3.org/2000/svg' fill='%23fff' ... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' vie… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' vie…www.w3.org/2000/svg' fill='%23fff' ... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='%23fff' width='8' height='8' vie… — 200 — 0 B — 0 ms — datahttps://stackpath.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0stackpath.bootstrapcdn.com/font-awe... https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/fonts/fontawesome-webfont.woff2?v=4.7.0 — 200 — 75.9 KiB — 26 ms — h3https://copyright.gov/about/images/manifest.json/about/images/manifest.json https://copyright.gov/about/images/manifest.json — -1 — 0 B — 0 ms — https://cdn.loc.gov/loader/js/jwplayer-7.9.3/jwplayer.jscdn.loc.gov/loader/js/jwplayer-7.9.... https://cdn.loc.gov/loader/js/jwplayer-7.9.3/jwplayer.js — 200 — 64.7 KiB — 46 ms — h2https://dpm.demdex.net/id?d_visid_ver=5.5.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_orgid=0D15148954E6C5100A4C98BC%40AdobeOrg&d_nsid=0&ts=1776804708240dpm.demdex.net/id?d_visid_ver=5.5.0... https://dpm.demdex.net/id?d_visid_ver=5.5.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_orgid=0D15148954E6C5100A4C98BC%40AdobeOrg&d_nsid=0&ts=1776804708240 — 200 — 931 B — 88 ms — h2https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement.min.jsassets.adobedtm.com/extensions/EPef... https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement.min.js — 200 — 12.7 KiB — 8 ms — h2https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement_Module_ActivityMap.min.jsassets.adobedtm.com/extensions/EPef... https://assets.adobedtm.com/extensions/EPef068a8d6dd34a43866d9a80cc98baab/AppMeasurement_Module_ActivityMap.min.js — 200 — 1.8 KiB — 10 ms — h2https://smon.copyright.gov/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&mid=81218167144323297912746786294292822352&ts=1776804708355smon.copyright.gov/id?d_visid_ver=5... https://smon.copyright.gov/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&mid=81218167144323297912746786294292822352&ts=1776804708355 — 200 — 457 B — 80 ms — h2https://cm.everesttech.net/cm/dd?d_uuid=81230628593831938722743286391962714239cm.everesttech.net/cm/dd?d_uuid=812... https://cm.everesttech.net/cm/dd?d_uuid=81230628593831938722743286391962714239 — 302 — 517 B — 73 ms — http/1.1https://unitedstateslibraryofcongress.demdex.net/dest5.html?d_nsid=0unitedstateslibraryofcongress.demde... https://unitedstateslibraryofcongress.demdex.net/dest5.html?d_nsid=0 — 200 — 3.2 KiB — 110 ms — h2https://dpm.demdex.net/ibs:dpid=411&dpuuid=aefjZAAAAGLVzAM0dpm.demdex.net/ibs:dpid=411&dpuuid=... https://dpm.demdex.net/ibs:dpid=411&dpuuid=aefjZAAAAGLVzAM0 — 302 — 531 B — 25 ms — h2https://dpm.demdex.net/demconf.jpg?et:ibs%7cdata:dpid=411&dpuuid=aefjZAAAAGLVzAM0dpm.demdex.net/demconf.jpg?et:ibs%7... https://dpm.demdex.net/demconf.jpg?et:ibs%7cdata:dpid=411&dpuuid=aefjZAAAAGLVzAM0 — 200 — 470 B — 26 ms — h2https://copyright.gov/about/images/favicon-32x32.png/about/images/favicon-32x32.png https://copyright.gov/about/images/favicon-32x32.png — 200 — 1.8 KiB — 20 ms — h2https://smon.copyright.gov/b/ss/loccopyright/1/JS-2.25.0-LEWM/s83831825309474?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A51%3A48%202%200&mid=81218167144323297912746786294292822352&aamlh=9&ce=UTF-8&cdp=2&fpCookieDomainPeriods=2&pageName=U.S.%20Copyright%20Office%20%7C%20U.S.%20Copyright%20Office&g=https%3A%2F%2Fcopyright.gov%2F&c.&apl=4.0&inList=3.0&getPageLoadTime=2.0.2&performanceWriteFull=1.0&performanceWritePart=1.0&performanceCheck=1.0&p_fo=3.0&getPreviousValue=3.0.1&.c&cc=USD&server=copyright.gov&events=event40&aamb=6G1ynYcLPuiQxYZrsz_pkqfLG9yMXBpb2zX5dvJdYQJzPXImdj0y&c1=U.S.%20Copyright%20Office%20%7C%20U.S.%20Copyright%20Office&v8=year%3D2026%20%7C%20month%3DApril%20%7C%20date%3D21%20%7C%20day%3DTuesday%20%7C%20time%3D4%3A51%20PM&c9=D%3Dv19&v15=https%3A%2F%2Fcopyright.gov%2F&v19=PRODDEC2012-1&c61=home&c68=0.39&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&AQE=1smon.copyright.gov/b/ss/loccopyrigh... https://smon.copyright.gov/b/ss/loccopyright/1/JS-2.25.0-LEWM/s83831825309474?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A51%3A48%202%200&mid=81218167144323297912746786294292822352&aamlh=9&ce=UTF-8&cdp=2&fpCookieDomainPeriods=2&pageName=U.S.%20Copyright%20Office%20%7C%20U.S.%20Copyright%20Office&g=https%3A%2F%2Fcopyright.gov%2F&c.&apl=4.0&inList=3.0&getPageLoadTime=2.0.2&performanceWriteFull=1.0&performanceWritePart=1.0&performanceCheck=1.0&p_fo=3.0&getPreviousValue=3.0.1&.c&cc=USD&server=copyright.gov&events=event40&aamb=6G1ynYcLPuiQxYZrsz_pkqfLG9yMXBpb2zX5dvJdYQJzPXImdj0y&c1=U.S.%20Copyright%20Office%20%7C%20U.S.%20Copyright%20Office&v8=year%3D2026%20%7C%20month%3DApril%20%7C%20date%3D21%20%7C%20day%3DTuesday%20%7C%20time%3D4%3A51%20PM&c9=D%3Dv19&v15=https%3A%2F%2Fcopyright.gov%2F&v19=PRODDEC2012-1&c61=home&c68=0.39&s=800x600&c=24&j=1.6&v=N&k=Y&bw=1350&bh=940&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&AQE=1 — 200 — 305 B — 27 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
66% of JavaScript execution is third-party
First-party Third-party 217ms · 62KB · €2/mo
Unattributable
Other
Optional
Execution 116ms
Transfer 0 KB
Monthly Cost €1/mo
assets.adobedtm.com
Other
Optional
Execution 101ms
Transfer 62 KB
Unused 39%
Monthly Cost €1/mo

66% 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

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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