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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
34
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.
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.

9.91 s

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

28.68 s

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

971 ms

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

0.013

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

13.53 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.

29.94 s

Page Load Progression

584 ms
1.2 s
1.8 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
2.8 MB transferred, 163 requests
FIX
2.8 MB transferred, 163 requests
Warning::
Page weighs 7.1 MB (2.8 MB transferred)
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
Fonts are 486 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 486 KB
Warning::
163 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.58 g CO2 per page load
2.8 MB / 2.4 MB budget
2.8 MB transferred
163 requests
0.58 g CO2 per page load
JavaScript 1.4 MiB 48%
Images 785.7 KiB 28%
Fonts 486.1 KiB 17%
CSS 168.8 KiB 6%
HTML 17.6 KiB 1%
Other 11.4 KiB 0%
Other 625 B 0%
Other 595 B 0%
Other 232 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (2.8 MiB of 2.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3627ms total JS execution
FIX
3627ms total JS execution
Warning::
Unattributable: 655ms CPU time
Warning::
https://www.usgs.gov/: 649ms CPU time
Warning::
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml...: 382ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 313ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KWR...: 306ms CPU time
Warning::
Third-party scripts: 3627ms (100% of total)

Main Thread Breakdown

Script Evaluation 44% Other 21% Style & Layout 16% Script Parsing & Compilation 11% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
Unattributable655ms7ms0ms3rd
https://www.usgs.gov/649ms7ms2ms3rd
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js382ms273ms108ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L313ms275ms38ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KWRSKS306ms248ms30ms3rd
https://www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1287ms249ms36ms3rd
https://www.usgs.gov/core/misc/drupal.init.js?v=10.5.6264ms141ms0ms3rd
https://touchpoints.app.cloud.gov/touchpoints/5e10f821.js177ms70ms52ms3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js158ms128ms21ms3rd
https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js96ms92ms2ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
87 scripts, 513 KB unused
FIX
87 scripts, 513 KB unused
Warning::
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml...: 122 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 106 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KWR...: 68 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 61 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-FH5X...: 61 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 513 KB
513 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js251 KB122 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1147 KB106 KB (72%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KWRSKS136 KB68 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147 KB61 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1157 KB61 KB (39%)✓3rd
https://www.usgs.gov/modules/custom/usgs_products/js/jquery.dataTables.js?v=1.0.0113 KB57 KB (51%)✗3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB37 KB (67%)✓3rd
https://www.usgs.gov/core/misc/message.js?v=10.5.63 KB—✓3rd
https://www.usgs.gov/core/misc/dialog/dialog-deprecation.js?v=10.5.61 KB—✓3rd
https://www.usgs.gov/core/misc/drupal.init.js?v=10.5.61 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

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
Page Weight Inventory
Action
163 resources · 2.8 MB · 513 KB savings available
FIX
163 resources · 2.8 MB · 513 KB savings available
Warning::
Page weight 1.8 MB over 1MB target
Got: 2.8 MB Expected: ≤ 1 MB
Info::
~513 KB of savings available
Warning::
162 third-party resources (100% of weight)
Info::
1 resources over 200KB
163 resources · 2.8 MiB · 162 third-party 1.8 MiB over 1MB target
JavaScript 48% · 1.4 MiB
Image 28% · 796.8 KiB
Font 17% · 486.1 KiB
CSS 6% · 168.8 KiB
Document 1% · 17.9 KiB
Other 0% · 1.4 KiB

~512.8 KiB of savings available

Remove unused JavaScript: 512.8 KiB
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
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/u... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://touchpoints.app.cloud.gov/img/us_flag_smal... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.usgs.gov/themes/custom/usgs_tantalum/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
21 images 786 KB
0 oversized -0 KB
21 legacy format
8 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

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+
Font Loading
10 fonts (486 KB)
PASS
10 fonts (486 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

486 KB total

Render-blocking

0

of 10

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 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s FCP 9.9 s LCP 28.7 shttps://use.fontawesome.com/releases/v6.5.1/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://use.fontawesome.com/releases/v6.5.1/webfonts/fa-solid-900.woff2 — 153.5 KiB — 224 ms — font-display: swaphttps://use.fontawesome.com/releases/v6.5.1/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://use.fontawesome.com/releases/v6.5.1/webfonts/fa-brands-400.woff2 — 115.1 KiB — 245 ms — font-display: swaphttps://use.fontawesome.com/releases/v6.5.1/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://use.fontawesome.com/releases/v6.5.1/webfonts/fa-regular-400.woff2 — 25.2 KiB — 244 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-SemiBold.woff2PublicSans-SemiBold.woff2 https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-SemiBold.woff2 — 32.2 KiB — 434 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Light.woff2Latin-Merriweather-Ligh... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Light.woff2 — 21.1 KiB — 468 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Bold.woff2PublicSans-Bold.woff2 https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Bold.woff2 — 32.0 KiB — 461 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Regular.woff2PublicSans-Regular.woff2 https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Regular.woff2 — 32.1 KiB — 436 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Regular.woff2Latin-Merriweather-Regu... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Regular.woff2 — 21.5 KiB — 421 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Light.woff2PublicSans-Light.woff2 https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Light.woff2 — 32.2 KiB — 423 ms — font-display: swaphttps://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Bold.woff2Latin-Merriweather-Bold... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Bold.woff2 — 21.2 KiB — 443 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 153 KB
Load time 224 ms
Start 3.6 s
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
fa-brands-400.woff2 woff2 swap
Size 115 KB
Load time 245 ms
Start 3.6 s
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
fa-regular-400.woff2 woff2 swap
Size 25 KB
Load time 244 ms
Start 3.6 s
Risk FOUT — text flashes from fallback to web font
PublicSans-SemiBold.woff2 woff2 swap
Size 32 KB
Load time 434 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
Latin-Merriweather-Ligh... woff2 swap
Size 21 KB
Load time 468 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
PublicSans-Bold.woff2 woff2 swap
Size 32 KB
Load time 461 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
PublicSans-Regular.woff2 woff2 swap
Size 32 KB
Load time 436 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
Latin-Merriweather-Regu... woff2 swap
Size 22 KB
Load time 421 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
PublicSans-Light.woff2 woff2 swap
Size 32 KB
Load time 423 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
Latin-Merriweather-Bold... woff2 swap
Size 21 KB
Load time 443 ms
Start 4.0 s
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)

Fixing the unchecked items could save ~134 KB and ~268 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
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
163 requests over 5724ms
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 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s FCP 9.9 s LCP 28.7 shttps://usgs.gov// https://usgs.gov/ — 301 — 339 B — 1.2 s — http/1.1https://www.usgs.gov/www.usgs.gov/ https://www.usgs.gov/ — 200 — 17.6 KiB — 1.9 s — http/1.1https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/core.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/core.css?tduby0 — 200 — 1.0 KiB — 364 ms — h3https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/controlgroup.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/controlgroup.css?tduby0 — 200 — 885 B — 382 ms — h3https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/checkboxradio.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/checkboxradio.css?tduby0 — 200 — 723 B — 542 ms — h3https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/resizable.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/resizable.css?tduby0 — 200 — 769 B — 401 ms — h3https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/button.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/button.css?tduby0 — 200 — 994 B — 537 ms — h3https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/dialog.css?tduby0www.usgs.gov/core/assets/vendor/jqu... https://www.usgs.gov/core/assets/vendor/jquery.ui/themes/base/dialog.css?tduby0 — 200 — 960 B — 552 ms — h3https://www.usgs.gov/core/misc/components/progress.module.css?tduby0www.usgs.gov/core/misc/components/p... https://www.usgs.gov/core/misc/components/progress.module.css?tduby0 — 200 — 712 B — 550 ms — h3https://www.usgs.gov/core/misc/components/ajax-progress.module.css?tduby0www.usgs.gov/core/misc/components/a... https://www.usgs.gov/core/misc/components/ajax-progress.module.css?tduby0 — 200 — 840 B — 560 ms — h3https://www.usgs.gov/core/modules/system/css/components/align.module.css?tduby0www.usgs.gov/core/modules/system/cs... https://www.usgs.gov/core/modules/system/css/components/align.module.css?tduby0 — 200 — 576 B — 572 ms — h3https://www.usgs.gov/core/modules/system/css/components/fieldgroup.module.css?tduby0www.usgs.gov/core/modules/system/cs... https://www.usgs.gov/core/modules/system/css/components/fieldgroup.module.css?tduby0 — 200 — 455 B — 579 ms — h3https://www.usgs.gov/core/modules/system/css/components/container-inline.module.css?tduby0www.usgs.gov/core/modules/system/cs... https://www.usgs.gov/core/modules/system/css/components/container-inline.module.css?tduby0 — 200 — 529 B — 534 ms — h3https://www.usgs.gov/core/modules/system/css/components/clearfix.module.css?tduby0www.usgs.gov/core/modules/system/cs... 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https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/usa-icons/expand_more.svg — 200 — 508 B — 348 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/search.pngwww.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/search.png — 200 — 874 B — 354 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/menu.pngwww.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/menu.png — 200 — 539 B — 346 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/back-top.pngwww.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/img/back-top.png — 200 — 8.7 KiB — 333 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-SemiBold.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-SemiBold.woff2 — 200 — 32.2 KiB — 434 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Light.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Light.woff2 — 200 — 21.1 KiB — 468 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Bold.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Bold.woff2 — 200 — 32.0 KiB — 461 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Regular.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Regular.woff2 — 200 — 32.1 KiB — 436 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Regular.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Regular.woff2 — 200 — 21.5 KiB — 421 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Light.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/public-sans/PublicSans-Light.woff2 — 200 — 32.2 KiB — 423 ms — h3https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Bold.woff2www.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/assets/fonts/merriweather/Latin-Merriweather-Bold.woff2 — 200 — 21.2 KiB — 443 ms — h3https://vc.hotjar.io/sessions/606685?s=0.25&r=0.057504268859902785vc.hotjar.io/sessions/606685?s=0.25... https://vc.hotjar.io/sessions/606685?s=0.25&r=0.057504268859902785 — 204 — 232 B — 121 ms — h2https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOI&subagency=USGS&pua=UA-77708142-1&pua=UA-108444827-1&pga4=G-FH5X1PMV8C&sp=lookup,locate,keywords&exts=png,gif,jpg&dclink=true&autotracker=true&yt=true&optout=false&palinteractiontypedim=1dap.digitalgov.gov/Universal-Federa... https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=DOI&subagency=USGS&pua=UA-77708142-1&pua=UA-108444827-1&pga4=G-FH5X1PMV8C&sp=lookup,locate,keywords&exts=png,gif,jpg&dclink=true&autotracker=true&yt=true&optout=false&palinteractiontypedim=1 — 200 — 9.4 KiB — 70 ms — h3https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.jsdap.digitalgov.gov/web-vitals/dist/... https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js — 200 — 4.5 KiB — 21 ms — h3https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4Lwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L — 200 — 147.3 KiB — 48 ms — h2https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1 — 200 — 147.2 KiB — 70 ms — h2https://www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-FH5X1PMV8C&cx=c&gtm=4e64h1 — 200 — 157.1 KiB — 56 ms — h2https://www.youtube.com/iframe_apiwww.youtube.com/iframe_api https://www.youtube.com/iframe_api — 200 — 3.2 KiB — 114 ms — 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https://region1.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64h1v9131934939za200zb72219539zd72219539&_p=1776798221486&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1105798111.1776798223&frm=0&pscdl=noapi&rcb=10&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117384406&dl=https%3A%2F%2Fusgs.gov%2F&dt=USGS.gov%20%7C%20Science%20for%20a%20changing%20world&dr=&sid=1776798222&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.agency=DOI&ep.subagency=USGS&ep.site_topic=unspecified%3Ausgs.gov&ep.site_platform=unspecified%3Ausgs.gov&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=pga4&ep.hostname_dimension=usgs.gov&tfd=4465 — 204 — 547 B — 172 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-FH5X1PMV8C&gtm=45je64h1v9136511473za200zb72219539zd72219539&_p=1776798221486&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1105798111.1776798223&frm=0&pscdl=noapi&rcb=11&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266400~117384405~118463262&dl=https%3A%2F%2Fusgs.gov%2F&dt=USGS.gov%20%7C%20Science%20for%20a%20changing%20world&dr=&sid=1776798222&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&tfd=4565region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-FH5X1PMV8C&gtm=45je64h1v9136511473za200zb72219539zd72219539&_p=1776798221486&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1105798111.1776798223&frm=0&pscdl=noapi&rcb=11&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266400~117384405~118463262&dl=https%3A%2F%2Fusgs.gov%2F&dt=USGS.gov%20%7C%20Science%20for%20a%20changing%20world&dr=&sid=1776798222&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&tfd=4565 — 204 — 48 B — 76 ms — h2https://touchpoints.app.cloud.gov/img/usa-icons/launch.svgtouchpoints.app.cloud.gov/img/usa-i... https://touchpoints.app.cloud.gov/img/usa-icons/launch.svg — 200 — 609 B — 731 ms — h2https://touchpoints.app.cloud.gov/img/us_flag_small.pngtouchpoints.app.cloud.gov/img/us_fl... https://touchpoints.app.cloud.gov/img/us_flag_small.png — 200 — 515 B — 187 ms — h2https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/218d9d92/w... https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 28 ms — h2https://www.usgs.gov/themes/custom/usgs_tantalum/favicon.icowww.usgs.gov/themes/custom/usgs_tan... https://www.usgs.gov/themes/custom/usgs_tantalum/favicon.ico — 200 — 11.1 KiB — 340 ms — h3
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 3627ms · 1257KB · $48/mo
Unattributable
Other
Costly
Execution 655ms
Transfer 0 KB
Monthly Cost $9/mo
www.usgs.gov
Other
Costly
Execution 649ms
Transfer 18 KB
Monthly Cost $9/mo
jsDelivr
CDN
Costly
Execution 382ms
Transfer 251 KB
Unused 49%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 313ms
Transfer 147 KB
Unused 42%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 306ms
Transfer 136 KB
Unused 50%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 287ms
Transfer 157 KB
Unused 39%
Monthly Cost $4/mo
www.usgs.gov
Other
Costly
Execution 264ms
Transfer 1 KB
Monthly Cost $4/mo
touchpoints.app.cloud.gov
Other
Optional
Execution 177ms
Transfer 80 KB
Monthly Cost $2/mo
Hotjar
Session Replay
Optional
Execution 158ms
Transfer 57 KB
Unused 67%
Monthly Cost $2/mo
dap.digitalgov.gov
Other
Optional
Execution 96ms
Transfer 4 KB
Monthly Cost $1/mo
www.usgs.gov
Other
Optional
Execution 79ms
Transfer 106 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 74ms
Transfer 147 KB
Unused 72%
Monthly Cost $1/mo
www.usgs.gov
Other
Optional
Execution 69ms
Transfer 30 KB
Monthly Cost $1/mo
www.usgs.gov
Other
Optional
Execution 65ms
Transfer 113 KB
Unused 51%
Monthly Cost $1/mo
dap.digitalgov.gov
Other
Optional
Execution 53ms
Transfer 9 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 655ms and costs ~$9/month
  • www.usgs.gov adds 649ms and costs ~$9/month
  • jsDelivr adds 382ms and costs ~$5/month
  • Google Tag Manager adds 313ms and costs ~$4/month
  • Google Tag Manager adds 306ms and costs ~$4/month
  • Google Tag Manager adds 287ms and costs ~$4/month
  • www.usgs.gov adds 264ms and costs ~$4/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 655ms 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

www.usgs.gov takes 649ms 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

jsDelivr takes 382ms 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 313ms 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 306ms 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

50% 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 Tag Manager takes 287ms 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

www.usgs.gov takes 264ms 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

67% of Hotjar'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

72% 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

51% of www.usgs.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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