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https://darpa.mil

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
6
REVIEW
2
PASS
5
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.
81
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.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.85 s

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

6.05 s

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

188 ms

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

1.123

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

2.50 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.

6.90 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
5 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
10.9 MB transferred, 144 requests
FIX
10.9 MB transferred, 144 requests
Critical::
Page weighs 20.0 MB (10.9 MB transferred)
Warning::
JavaScript is 5.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 5.1 MB
Warning::
Images are 4.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.2 MB
Info::
CSS is 834 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 834 KB
Info::
Fonts are 221 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 221 KB
Warning::
144 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.3 g CO2 per page load
10.9 MB / 2.4 MB budget
10.9 MB transferred
144 requests
2.3 g CO2 per page load
JavaScript 5.1 MiB 47%
Images 4.2 MiB 38%
CSS 833.9 KiB 7%
Other 354.2 KiB 3%
HTML 222.4 KiB 2%
Fonts 220.7 KiB 2%
Other 3.0 KiB 0%
Other 2.7 KiB 0%
Other 454 B 0%
Other 0 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

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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 (10.9 MiB of 10.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2525ms total JS execution
FIX
2525ms total JS execution
Warning::
https://www.darpa.mil/: 630ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 591ms CPU time
Warning::
Unattributable: 390ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-4603...: 196ms CPU time
Info::
https://www.darpa.mil/themes/custom/darpa_uswds/as...: 180ms CPU time
Warning::
Third-party scripts: 2525ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 24% Style & Layout 13% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
https://www.darpa.mil/630ms6ms0ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js591ms480ms60ms3rd
Unattributable390ms8ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-4603P06FHC196ms169ms25ms3rd
https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/react/18_3_1/react.production.min.js?tdvso6180ms158ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L153ms110ms23ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MPT8LFHZ142ms118ms22ms3rd
https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/react/18_3_1/react-dom.production.min.js?tdvso6131ms29ms6ms3rd
https://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/navbar.bundle.js?tdvso659ms10ms45ms3rd
https://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/carousel.bundle.js?tdvso652ms37ms11ms3rd
F
JS Bundles
Action
60 scripts, 1021 KB unused
FIX
60 scripts, 1021 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 157 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 157 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 157 KB unused (43%)
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/gtag/js?id=G-4603...: 65 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1021 KB
1021 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB157 KB (43%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB157 KB (43%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB157 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h1147 KB106 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-4603P06FHC174 KB65 KB (37%)✓3rd
https://www.darpa.mil/core/assets/vendor/jquery/jquery.min.js?v=3.7.187 KB65 KB (76%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MPT8LFHZ134 KB65 KB (48%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147 KB62 KB (42%)✓3rd
https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/react/18_3_1/react-dom.production.min.js?tdvso6130 KB42 KB (33%)✓3rd
https://www.darpa.mil/core/misc/ajax.js?v=10.6.366 KB41 KB (64%)✗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
144 resources · 10.9 MB · 1021 KB savings available
FIX
144 resources · 10.9 MB · 1021 KB savings available
Warning::
Page weight 9.9 MB over 1MB target
Got: 10.9 MB Expected: ≤ 1 MB
Info::
~1021 KB of savings available
Warning::
143 third-party resources (100% of weight)
Info::
15 resources over 200KB
144 resources · 10.9 MiB · 143 third-party 9.9 MiB over 1MB target
JavaScript 47% · 5.1 MiB
Image 38% · 4.2 MiB
CSS 7% · 833.9 KiB
Other 3% · 351.7 KiB
Document 2% · 227.4 KiB
Font 2% · 220.7 KiB
Media 0% · 454 B

~1021.3 KiB of savings available

Remove unused JavaScript: 1021.3 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
45 images, 0 KB saveable
REVIEW
45 images, 0 KB saveable
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.darpa.mil/themes/custom/darpa_uswds/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
45 images 4.2 MB
0 oversized -0 KB
45 legacy format
11 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

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
6 fonts (221 KB)
PASS
6 fonts (221 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

221 KB total

Render-blocking

0

of 6

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 5.0 s 6.0 s FCP 1.9 s LCP 6.0 shttps://fonts.gstatic.com/s/inter/v20/UcCo3FwrK3iLTcviYwYZ8UA3.woff2UcCo3FwrK3iLTcviYwYZ8UA... https://fonts.gstatic.com/s/inter/v20/UcCo3FwrK3iLTcviYwYZ8UA3.woff2 — 71.3 KiB — 20 ms — font-display: swaphttps://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2sourcesanspro-regular-w... https://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-pro/sourcesanspro-regular-webfont.woff2 — 21.3 KiB — 64 ms — font-display: swaphttps://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2sourcesanspro-bold-webf... https://www.darpa.mil/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-pro/sourcesanspro-bold-webfont.woff2 — 21.1 KiB — 68 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 31 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2 — 39.2 KiB — 22 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 15 ms — font-display: swap
UcCo3FwrK3iLTcviYwYZ8UA... woff2 swap
Size 71 KB
Load time 20 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
sourcesanspro-regular-w... woff2 swap
Size 21 KB
Load time 64 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
sourcesanspro-bold-webf... woff2 swap
Size 21 KB
Load time 68 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 31 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 39 KB
Load time 22 ms
Start 3.2 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 15 ms
Start 3.8 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)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
144 requests over 5006ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.9 s LCP 6.0 shttps://darpa.mil// https://darpa.mil/ — 302 — 125 B — 677 ms — http/1.0https://www.darpa.mil/www.darpa.mil/ https://www.darpa.mil/ — 200 — 87.4 KiB — 401 ms — h2https://www.darpa.mil/sites/default/files/css/css_dHTSnv6R-NO3oLg2P0KNnvo0vksxN7uJr7DF-SwRgUk.css?delta=0&language=en&theme=darpa_uswds&include=eJxdkFGKBCEMRC8kLeyFpNRMj4saSWLP9p5-G5phcX7fq1RBUoXq6RupYid1iYV8ljlQN3zj5wadpaGWX3IZMhCmvrL6BOGpVFfI3ZAsPK6TcHwtbq8cscY7jghZ0OCcoBZGxUmrEkrULXR66cK1GIXG-aPceARDXLNzJG6l74GOq-vDKUJE79fsNc7TQi6a-CA5vb04cXWNcoF_lGokW8Kwwt0NCHbBeOr7d_9km33MWIs-KTs91aj5CCV3T975P_Nmml4www.darpa.mil/sites/default/files/c... https://www.darpa.mil/sites/default/files/css/css_dHTSnv6R-NO3oLg2P0KNnvo0vksxN7uJr7DF-SwRgUk.css?delta=0&language=en&theme=darpa_uswds&include=eJxdkFGKBCEMRC8kLeyFpNRMj4saSWLP9p5-G5phcX7fq1RBUoXq6RupYid1iYV8ljlQN3zj5wadpaGWX3IZMhCmvrL6BOGpVFfI3ZAsPK6TcHwtbq8cscY7jghZ0OCcoBZGxUmrEkrULXR66cK1GIXG-aPceARDXLNzJG6l74GOq-vDKUJE79fsNc7TQi6a-CA5vb04cXWNcoF_lGokW8Kwwt0NCHbBeOr7d_9km33MWIs-KTs91aj5CCV3T975P_Nmml4 — 200 — 6.3 KiB — 35 ms — h2https://www.darpa.mil/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D6jZvYMx4D-iR8gw.css?delta=1&language=en&theme=darpa_uswds&include=eJxdkFGKBCEMRC8kLeyFpNRMj4saSWLP9p5-G5phcX7fq1RBUoXq6RupYid1iYV8ljlQN3zj5wadpaGWX3IZMhCmvrL6BOGpVFfI3ZAsPK6TcHwtbq8cscY7jghZ0OCcoBZGxUmrEkrULXR66cK1GIXG-aPceARDXLNzJG6l74GOq-vDKUJE79fsNc7TQi6a-CA5vb04cXWNcoF_lGokW8Kwwt0NCHbBeOr7d_9km33MWIs-KTs91aj5CCV3T975P_Nmml4www.darpa.mil/sites/default/files/c... https://www.darpa.mil/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D6jZvYMx4D-iR8gw.css?delta=1&language=en&theme=darpa_uswds&include=eJxdkFGKBCEMRC8kLeyFpNRMj4saSWLP9p5-G5phcX7fq1RBUoXq6RupYid1iYV8ljlQN3zj5wadpaGWX3IZMhCmvrL6BOGpVFfI3ZAsPK6TcHwtbq8cscY7jghZ0OCcoBZGxUmrEkrULXR66cK1GIXG-aPceARDXLNzJG6l74GOq-vDKUJE79fsNc7TQi6a-CA5vb04cXWNcoF_lGokW8Kwwt0NCHbBeOr7d_9km33MWIs-KTs91aj5CCV3T975P_Nmml4 — 200 — 681.0 KiB — 51 ms — h2https://www.darpa.mil/core/misc/drupalSettingsLoader.js?v=10.6.3www.darpa.mil/core/misc/drupalSetti... https://www.darpa.mil/core/misc/drupalSettingsLoader.js?v=10.6.3 — 200 — 1.9 KiB — 26 ms — h2https://www.darpa.mil/modules/contrib/google_tag/js/gtag.js?tdvso6www.darpa.mil/modules/contrib/googl... https://www.darpa.mil/modules/contrib/google_tag/js/gtag.js?tdvso6 — 200 — 2.5 KiB — 27 ms — h2https://www.darpa.mil/modules/contrib/google_tag/js/gtm.js?tdvso6www.darpa.mil/modules/contrib/googl... https://www.darpa.mil/modules/contrib/google_tag/js/gtm.js?tdvso6 — 200 — 2.4 KiB — 30 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/us_flag_small.pngwww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/us_flag_small.png — 200 — 1.4 KiB — 46 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/icon-dot-gov.svgwww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/icon-dot-gov.svg — 200 — 1.8 KiB — 39 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/icon-https.svgwww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/packages/usa_banner/img/icon-https.svg — 200 — 1.9 KiB — 10 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/logo.svgwww.darpa.mil/themes/custom/darpa_u... 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h3https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — 200 — 50 B — 21 ms — h3https://www.youtube.com/embed/3tBE8qQl49g?si=ZnyFbDSF3skJ-Jvi&enablejsapi=1&origin=https%3A%2F%2Fwww.darpa.milwww.youtube.com/embed/3tBE8qQl49g?s... https://www.youtube.com/embed/3tBE8qQl49g?si=ZnyFbDSF3skJ-Jvi&enablejsapi=1&origin=https%3A%2F%2Fwww.darpa.mil — 200 — 51.8 KiB — 72 ms — h3https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — -1 — 0 B — 3 ms — https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/sigV4Client.jswww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/sigV4Client.js — 200 — 9.5 KiB — 12 ms — h2https://www.youtube.com/s/player/1bb6ee63/www-player.csswww.youtube.com/s/player/1bb6ee63/w... https://www.youtube.com/s/player/1bb6ee63/www-player.css — 200 — 0 B — 0 ms — h2https://www.youtube.com/s/_/ytembeds/_/ss/k=ytembeds.base.KjNKUXigSn8.L.W.O/am=AAAABA/d=0/br=1/rs=AGKMywEJITLW9kQSSYb_eVLtSgu_4tU6CQwww.youtube.com/s/_/ytembeds/_/ss/k... https://www.youtube.com/s/_/ytembeds/_/ss/k=ytembeds.base.KjNKUXigSn8.L.W.O/am=AAAABA/d=0/br=1/rs=AGKMywEJITLW9kQSSYb_eVLtSgu_4tU6CQ — 200 — 0 B — 0 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.-RE1iC8VNhI.es5.O/am=AAAABA/d=1/br=1/rs=AGKMywGXhZZuMuO0YRo6SSj6JkWgSrzy9g/m=root,basewww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.-RE1iC8VNhI.es5.O/am=AAAABA/d=1/br=1/rs=AGKMywGXhZZuMuO0YRo6SSj6JkWgSrzy9g/m=root,base — 200 — 156.2 KiB — 78 ms — h3https://www.youtube.com/s/player/1bb6ee63/player_embed.vflset/en_US/base.jswww.youtube.com/s/player/1bb6ee63/p... https://www.youtube.com/s/player/1bb6ee63/player_embed.vflset/en_US/base.js — 200 — 471.9 KiB — 91 ms — h3https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2 — 200 — 39.2 KiB — 22 ms — h3https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/apiGatewayClient.jswww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/apiGatewayClient.js — 200 — 3.6 KiB — 23 ms — h2https://www.youtube.com/s/player/1bb6ee63/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/1bb6ee63/w... https://www.youtube.com/s/player/1bb6ee63/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 38 ms — h2https://www.google.com/recaptcha/api2/anchor?ar=1&k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygB&co=aHR0cHM6Ly93d3cuZGFycGEubWlsOjQ0Mw..&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&anchor-ms=20000&execute-ms=30000&cb=g2jzqcvcb66uwww.google.com/recaptcha/api2/ancho... https://www.google.com/recaptcha/api2/anchor?ar=1&k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygB&co=aHR0cHM6Ly93d3cuZGFycGEubWlsOjQ0Mw..&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&anchor-ms=20000&execute-ms=30000&cb=g2jzqcvcb66u — 200 — 27.7 KiB — 34 ms — h3https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/simpleHttpClient.jswww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/simpleHttpClient.js — 200 — 4.1 KiB — 13 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/utils.jswww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/lib/apiGatewayCore/utils.js — 200 — 3.8 KiB — 7 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/apigClient.jswww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGateway-js-sdk/apigClient.js — 200 — 7.4 KiB — 12 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.csswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.css — 200 — 42.1 KiB — 21 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 361.9 KiB — 38 ms — h2https://googleads.g.doubleclick.net/pagead/idgoogleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id — 302 — 23 B — 114 ms — h3https://static.doubleclick.net/instream/ad_status.jsstatic.doubleclick.net/instream/ad_... https://static.doubleclick.net/instream/ad_status.js — 200 — 0 B — 1 ms — h2https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.-RE1iC8VNhI.es5.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGXhZZuMuO0YRo6SSj6JkWgSrzy9g/m=r78Drbwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.-RE1iC8VNhI.es5.O/am=AAAABA/d=1/exm=base,root/ed=1/br=1/rs=AGKMywGXhZZuMuO0YRo6SSj6JkWgSrzy9g/m=r78Drb — 200 — 202.7 KiB — 33 ms — h3https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4www.google.com/recaptcha/api2/webwo... https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4 — 200 — 23 B — 357 ms — h3https://googleads.g.doubleclick.net/pagead/id?slf_rd=1googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id?slf_rd=1 — 200 — 146 B — 16 ms — h3https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.3 KiB — 11 ms — h2https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 15 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 0 B — 19 ms — h2https://www.darpa.mil/themes/custom/darpa_uswds/favicon.icowww.darpa.mil/themes/custom/darpa_u... https://www.darpa.mil/themes/custom/darpa_uswds/favicon.ico — 200 — 2.9 KiB — 11 ms — h2https://i.ytimg.com/vi/3tBE8qQl49g/maxresdefault.jpgi.ytimg.com/vi/3tBE8qQl49g/maxresde... https://i.ytimg.com/vi/3tBE8qQl49g/maxresdefault.jpg — 200 — 127.2 KiB — 34 ms — h2https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svgwww.gstatic.com/youtube/img/icons/m... https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svg — 200 — 298 B — 14 ms — h3https://www.google.com/js/th/cN4AN9hxcU4NRvji1RMUfz3eri06TDMd9Q_fvSbDV9Q.jswww.google.com/js/th/cN4AN9hxcU4NRv... https://www.google.com/js/th/cN4AN9hxcU4NRvji1RMUfz3eri06TDMd9Q_fvSbDV9Q.js — 200 — 23.1 KiB — 8 ms — h3https://www.youtube.com/generate_204?G4mLhwwww.youtube.com/generate_204?G4mLhw https://www.youtube.com/generate_204?G4mLhw — 204 — 10 B — 3 ms — h3https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 21 ms — h2https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 312 B — 14 ms — h2https://www.google.com/recaptcha/api2/reload?k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygBwww.google.com/recaptcha/api2/reloa... https://www.google.com/recaptcha/api2/reload?k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygB — 200 — 2.1 KiB — 71 ms — h3https://www.google.com/recaptcha/api2/clr?k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygBwww.google.com/recaptcha/api2/clr?k... https://www.google.com/recaptcha/api2/clr?k=6Ld1CC8rAAAAAEkVZzTIlBekFJc8WUs4LunivygB — 200 — 16 B — 23 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 2525ms · 1735KB · $34/mo
www.darpa.mil
Other
Costly
Execution 630ms
Transfer 87 KB
Monthly Cost $8/mo
www.gstatic.com
Other
Costly
Execution 591ms
Transfer 0 KB
Unused 43%
Monthly Cost $8/mo
Unattributable
Other
Costly
Execution 390ms
Transfer 0 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Optional
Execution 196ms
Transfer 174 KB
Unused 37%
Monthly Cost $3/mo
www.darpa.mil
Other
Optional
Execution 180ms
Transfer 12 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 153ms
Transfer 147 KB
Unused 42%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 142ms
Transfer 134 KB
Unused 48%
Monthly Cost $2/mo
www.darpa.mil
Other
Optional
Execution 131ms
Transfer 130 KB
Unused 33%
Monthly Cost $2/mo
www.darpa.mil
Other
Optional
Execution 59ms
Transfer 857 KB
Monthly Cost $1/mo
www.darpa.mil
Other
Optional
Execution 52ms
Transfer 193 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.darpa.mil adds 630ms and costs ~$8/month
  • www.gstatic.com adds 591ms and costs ~$8/month
  • Unattributable adds 390ms and costs ~$5/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

www.darpa.mil takes 630ms 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.gstatic.com takes 591ms 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

Unattributable takes 390ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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