Skip to content
https://copyright.gov

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
68
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.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

2.79 s

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

18.10 s

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

187 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.

2.79 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.

18.10 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
17
10 PASS 4 REVIEW 1 FIX
F
Page Weight Budget
Action
8.0 MB transferred, 45 requests
FIX
8.0 MB transferred, 45 requests
Critical::
Page weighs 8.9 MB (8.0 MB transferred)
Warning::
Images are 7.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.6 MB
Info::
45 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
8.0 MB / 2.4 MB budget
8.0 MB transferred
45 requests
1.7 g CO2 per page load
Images 7.6 MiB 96%
JavaScript 219.6 KiB 3%
Other 66.1 KiB 1%
CSS 35.9 KiB 0%
HTML 15.0 KiB 0%
Other 5.4 KiB 0%
Other 2.9 KiB 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
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
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/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/copyright-exhibit-tag.pn... 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/LI-In-Bug.png 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/Fees.jpg 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.
23 images 7.6 MB
0 oversized -0 KB
22 legacy format
13 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

C
JS Execution Cost
Action
1449ms total JS execution
REVIEW
1449ms total JS execution
Warning::
https://copyright.gov/: 478ms CPU time
Warning::
Unattributable: 454ms CPU time
Warning::
https://assets.adobedtm.com/f94f5647937d/7b4a1bfef...: 334ms CPU time
Info::
https://cdn.loc.gov/loader/player/media.js: 95ms CPU time
Info::
https://code.jquery.com/jquery-3.5.1.min.js: 88ms CPU time
Warning::
Third-party scripts: 970ms (67% of total)

Main Thread Breakdown

Other 38% Script Evaluation 30% Style & Layout 18% Script Parsing & Compilation 6% Parse HTML & CSS 4% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://copyright.gov/478ms11ms4ms1st
Unattributable454ms6ms0ms3rd
https://assets.adobedtm.com/f94f5647937d/7b4a1bfefdc2/launch-b8f26e4510d8.min.js334ms285ms26ms3rd
https://cdn.loc.gov/loader/player/media.js95ms54ms40ms3rd
https://code.jquery.com/jquery-3.5.1.min.js88ms63ms9ms3rd
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=21129563167765764822591033022375605737&ts=17768046913170 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
45 resources · 8.0 MB · 97 KB savings available
REVIEW
45 resources · 8.0 MB · 97 KB savings available
Warning::
Page weight 7.0 MB over 1MB target
Got: 8.0 MB Expected: ≤ 1 MB
Info::
~97 KB of savings available
Info::
20 third-party resources (4% of weight)
Info::
14 resources over 200KB
45 resources · 8.0 MiB · 20 third-party 7.0 MiB over 1MB target
Image 96% · 7.6 MiB
JavaScript 3% · 284.8 KiB
CSS 0% · 35.9 KiB
Document 0% · 20.4 KiB
Other 0% · 1.9 KiB

~96.9 KiB of savings available

Remove unused JavaScript: 96.9 KiB
A+
Third-Party Impact
4% third-party, 0 ms blocking
PASS
4% third-party, 0 ms blocking
Info::
Third-party code accounts for 4% of page weight (325.0 KiB of 8.0 MiB)
Info::
Third-party blocking time is low (0 ms)
96%
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
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
45 requests over 723ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 2.8 s LCP 18.1 shttps://copyright.gov// https://copyright.gov/ — 200 — 11.8 KiB — 35 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 — 24.7 KiB — 48 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 — 36 ms — h3https://copyright.gov/css/styles.css/css/styles.css https://copyright.gov/css/styles.css — 200 — 1.6 KiB — 18 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 — 42 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 — 8.3 KiB — 34 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 — 45 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 — 83 ms — h2https://copyright.gov/img/cp-logo2.png/img/cp-logo2.png https://copyright.gov/img/cp-logo2.png — 200 — 7.3 KiB — 44 ms — h2https://copyright.gov/img/carousel-1.jpg/img/carousel-1.jpg https://copyright.gov/img/carousel-1.jpg — 200 — 593.5 KiB — 48 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 — 81 ms — h2https://copyright.gov/img/CPRS-slider-image.jpg/img/CPRS-slider-image.jpg https://copyright.gov/img/CPRS-slider-image.jpg — 200 — 741.3 KiB — 95 ms — h2https://cdn.loc.gov/loader/css/style.csscdn.loc.gov/loader/css/style.css https://cdn.loc.gov/loader/css/style.css — 200 — 2.2 KiB — 40 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 — 756.6 KiB — 88 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 — 122 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 — 119 ms — h2https://copyright.gov/img/Brushes.png/img/Brushes.png https://copyright.gov/img/Brushes.png — 200 — 147.9 KiB — 121 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 — 156 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 — 172 ms — h2https://copyright.gov/img/Recordation.jpg/img/Recordation.jpg https://copyright.gov/img/Recordation.jpg — 200 — 331.6 KiB — 176 ms — h2https://copyright.gov/img/Copyright%20Law.jpg/img/Copyright%20Law.jpg https://copyright.gov/img/Copyright%20Law.jpg — 200 — 419.4 KiB — 196 ms — h2https://copyright.gov/img/Who%20We%20Are.jpg/img/Who%20We%20Are.jpg https://copyright.gov/img/Who%20We%20Are.jpg — 200 — 520.4 KiB — 220 ms — h2https://copyright.gov/img/Fees.jpg/img/Fees.jpg https://copyright.gov/img/Fees.jpg — 200 — 384.0 KiB — 234 ms — h2https://copyright.gov/img/copyright-exhibit-tag.png/img/copyright-exhibit-tag.png https://copyright.gov/img/copyright-exhibit-tag.png — 200 — 285.0 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 — 269 ms — h2https://copyright.gov/img/RSS.png/img/RSS.png https://copyright.gov/img/RSS.png — 200 — 2.3 KiB — 251 ms — h2https://copyright.gov/img/x-logo.png/img/x-logo.png https://copyright.gov/img/x-logo.png — 200 — 100.8 KiB — 266 ms — h2https://copyright.gov/img/YouTube.png/img/YouTube.png https://copyright.gov/img/YouTube.png — 200 — 1.4 KiB — 266 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 — 266 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 2.8 s LCP 18.1 shttps://copyright.gov// https://copyright.gov/ — 200 — 11.8 KiB — 35 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 — 24.7 KiB — 48 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 — 36 ms — h3https://copyright.gov/css/styles.css/css/styles.css https://copyright.gov/css/styles.css — 200 — 1.6 KiB — 18 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 — 42 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 — 8.3 KiB — 34 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 — 45 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 — 83 ms — h2https://copyright.gov/img/cp-logo2.png/img/cp-logo2.png https://copyright.gov/img/cp-logo2.png — 200 — 7.3 KiB — 44 ms — h2https://copyright.gov/img/carousel-1.jpg/img/carousel-1.jpg https://copyright.gov/img/carousel-1.jpg — 200 — 593.5 KiB — 48 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 — 81 ms — h2https://copyright.gov/img/CPRS-slider-image.jpg/img/CPRS-slider-image.jpg https://copyright.gov/img/CPRS-slider-image.jpg — 200 — 741.3 KiB — 95 ms — h2https://cdn.loc.gov/loader/css/style.csscdn.loc.gov/loader/css/style.css https://cdn.loc.gov/loader/css/style.css — 200 — 2.2 KiB — 40 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 — 756.6 KiB — 88 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 — 122 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 — 119 ms — h2https://copyright.gov/img/Brushes.png/img/Brushes.png https://copyright.gov/img/Brushes.png — 200 — 147.9 KiB — 121 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 — 156 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 — 172 ms — h2https://copyright.gov/img/Recordation.jpg/img/Recordation.jpg https://copyright.gov/img/Recordation.jpg — 200 — 331.6 KiB — 176 ms — h2https://copyright.gov/img/Copyright%20Law.jpg/img/Copyright%20Law.jpg https://copyright.gov/img/Copyright%20Law.jpg — 200 — 419.4 KiB — 196 ms — h2https://copyright.gov/img/Who%20We%20Are.jpg/img/Who%20We%20Are.jpg https://copyright.gov/img/Who%20We%20Are.jpg — 200 — 520.4 KiB — 220 ms — h2https://copyright.gov/img/Fees.jpg/img/Fees.jpg https://copyright.gov/img/Fees.jpg — 200 — 384.0 KiB — 234 ms — h2https://copyright.gov/img/copyright-exhibit-tag.png/img/copyright-exhibit-tag.png https://copyright.gov/img/copyright-exhibit-tag.png — 200 — 285.0 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 — 269 ms — h2https://copyright.gov/img/RSS.png/img/RSS.png https://copyright.gov/img/RSS.png — 200 — 2.3 KiB — 251 ms — h2https://copyright.gov/img/x-logo.png/img/x-logo.png https://copyright.gov/img/x-logo.png — 200 — 100.8 KiB — 266 ms — h2https://copyright.gov/img/YouTube.png/img/YouTube.png https://copyright.gov/img/YouTube.png — 200 — 1.4 KiB — 266 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 — 266 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 — 94 ms — data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30…www.w3.org/2000/svg' width='30' hei... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30… — 200 — 0 B — 0 ms — datahttps://copyright.gov/about/images/manifest.json/about/images/manifest.json https://copyright.gov/about/images/manifest.json — 404 — 5.4 KiB — 240 ms — h2https://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 — 106 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=1776804691207dpm.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=1776804691207 — 200 — 931 B — 91 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 — 12 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 — 8 ms — h2https://smon.copyright.gov/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&mid=21129563167765764822591033022375605737&ts=1776804691317smon.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=21129563167765764822591033022375605737&ts=1776804691317 — 200 — 457 B — 91 ms — h2https://cm.everesttech.net/cm/dd?d_uuid=21161788661872263172592284664280698054cm.everesttech.net/cm/dd?d_uuid=211... https://cm.everesttech.net/cm/dd?d_uuid=21161788661872263172592284664280698054 — 302 — 517 B — 84 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 — 101 ms — h2https://dpm.demdex.net/ibs:dpid=411&dpuuid=aefjUwAAAKS-bQNxdpm.demdex.net/ibs:dpid=411&dpuuid=... https://dpm.demdex.net/ibs:dpid=411&dpuuid=aefjUwAAAKS-bQNx — 302 — 532 B — 29 ms — h2https://dpm.demdex.net/demconf.jpg?et:ibs%7cdata:dpid=411&dpuuid=aefjUwAAAKS-bQNxdpm.demdex.net/demconf.jpg?et:ibs%7... https://dpm.demdex.net/demconf.jpg?et:ibs%7cdata:dpid=411&dpuuid=aefjUwAAAKS-bQNx — 200 — 470 B — 38 ms — h2https://copyright.gov/about/images/manifest.json/about/images/manifest.json https://copyright.gov/about/images/manifest.json — 404 — 0 B — 3 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 — 19 ms — h2https://smon.copyright.gov/b/ss/loccopyright/1/JS-2.25.0-LEWM/s88639902818581?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A51%3A31%202%200&mid=21129563167765764822591033022375605737&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=0.32&s=412x823&c=24&j=1.6&v=N&k=Y&bw=412&bh=823&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&AQE=1smon.copyright.gov/b/ss/loccopyrigh... https://smon.copyright.gov/b/ss/loccopyright/1/JS-2.25.0-LEWM/s88639902818581?AQB=1&ndh=1&pf=1&t=21%2F3%2F2026%2020%3A51%3A31%202%200&mid=21129563167765764822591033022375605737&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=0.32&s=412x823&c=24&j=1.6&v=N&k=Y&bw=412&bh=823&mcorgid=0D15148954E6C5100A4C98BC%40AdobeOrg&AQE=1 — 200 — 305 B — 32 ms — h2
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 970ms · 180KB · €11/mo
Unattributable
Other
Costly
Execution 454ms
Transfer 0 KB
Monthly Cost €5/mo
assets.adobedtm.com
Other
Costly
Execution 334ms
Transfer 62 KB
Unused 39%
Monthly Cost €4/mo
cdn.loc.gov
Other
Optional
Execution 95ms
Transfer 87 KB
Unused 83%
Monthly Cost €1/mo
code.jquery.com
Other
Optional
Execution 88ms
Transfer 31 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 454ms and costs ~€5/month
  • assets.adobedtm.com adds 334ms and costs ~€4/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 454ms 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

assets.adobedtm.com takes 334ms 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

83% of cdn.loc.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.

Send Feedback