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https://cia.gov

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
82
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.

663 ms

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

1.52 s

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

14 ms

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

0.001

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

1.25 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.40 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 4 REVIEW 4 FIX
F
Page Weight Budget
Action
3.3 MB transferred, 61 requests
FIX
3.3 MB transferred, 61 requests
Warning::
Page weighs 5.5 MB (3.3 MB transferred)
Warning::
Images are 2.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.4 MB
Info::
Fonts are 285 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 285 KB
Info::
61 HTTP requests
Info::
Estimated 0.69 g CO2 per page load
3.3 MB / 2.4 MB budget
3.3 MB transferred
61 requests
0.69 g CO2 per page load
Images 2.4 MiB 74%
JavaScript 340.7 KiB 10%
Fonts 285.2 KiB 8%
Other 148.2 KiB 4%
HTML 59.5 KiB 2%
Other 40.3 KiB 1%
Other 744 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

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 (3.3 MiB of 3.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
61 resources · 3.3 MB · 131 KB savings available
FIX
61 resources · 3.3 MB · 131 KB savings available
Warning::
Page weight 2.3 MB over 1MB target
Got: 3.3 MB Expected: ≤ 1 MB
Info::
~131 KB of savings available
Warning::
60 third-party resources (100% of weight)
Info::
2 resources over 200KB
61 resources · 3.3 MiB · 60 third-party 2.3 MiB over 1MB target
Image 75% · 2.5 MiB
JavaScript 10% · 340.7 KiB
Font 8% · 285.2 KiB
Other 4% · 149.1 KiB
Document 2% · 59.5 KiB

~131.4 KiB of savings available

Remove unused JavaScript: 131.4 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.

B
Image Optimization
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Info::
All images are well-optimized
24 images 2.4 MB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
949ms total JS execution
REVIEW
949ms total JS execution
Warning::
https://www.cia.gov/: 417ms CPU time
Warning::
https://www.cia.gov/framework-481beeb6bc5ccc2a4757...: 300ms CPU time
Info::
Unattributable: 165ms CPU time
Info::
https://www.cia.gov/75fc9c18-ad310dbbcd6f2aca941e....: 67ms CPU time
Warning::
Third-party scripts: 949ms (100% of total)

Main Thread Breakdown

Other 42% Script Evaluation 30% Style & Layout 12% Script Parsing & Compilation 8% Rendering 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.cia.gov/417ms26ms3ms3rd
https://www.cia.gov/framework-481beeb6bc5ccc2a4757.js300ms207ms9ms3rd
Unattributable165ms7ms0ms3rd
https://www.cia.gov/75fc9c18-ad310dbbcd6f2aca941e.js67ms63ms2ms3rd
B
JS Bundles
12 scripts, 131 KB unused
REVIEW
12 scripts, 131 KB unused
Warning::
https://www.cia.gov/component---src-templates-page...: 57 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.cia.gov/commons-0c93c27e22e15f6b978b.j...: 29 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.cia.gov/js2/verification.js: 24 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.cia.gov/b637e9a5-e830966c7b78245dccc9....: 22 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 131 KB
131 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.cia.gov/component---src-templates-page-js-994cbc94a939325112f0.js92 KB57 KB (62%)✓3rd
https://www.cia.gov/commons-0c93c27e22e15f6b978b.js45 KB29 KB (65%)✓3rd
https://www.cia.gov/js2/verification.js27 KB24 KB (90%)✓3rd
https://www.cia.gov/b637e9a5-e830966c7b78245dccc9.js30 KB22 KB (76%)✓3rd
https://www.cia.gov/js2/pubkey.js1 KB—✓3rd
https://www.cia.gov/webpack-runtime-bdd5a6fdb7a99f3d72d4.js3 KB—✓3rd
https://www.cia.gov/framework-481beeb6bc5ccc2a4757.js43 KB—✓3rd
https://www.cia.gov/app-bd3d900226fb938894f0.js27 KB—✓3rd
https://www.cia.gov/js2/languages.js9 KB—✗3rd
https://www.cia.gov/75fc9c18-ad310dbbcd6f2aca941e.js19 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

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
7 fonts (285 KB)
PASS
7 fonts (285 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

285 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 663 ms LCP 1.5 shttps://www.cia.gov/static/PublicSans-Light-05ff7d7149c9a6d61fc10c3842f14215.woffPublicSans-Light-05ff7d... https://www.cia.gov/static/PublicSans-Light-05ff7d7149c9a6d61fc10c3842f14215.woff — 41.0 KiB — 102 ms — font-display: swaphttps://www.cia.gov/static/GT-America-Mono-Bold-5cb65dbcadbc053b4803a3de9e5204a1.woff2GT-America-Mono-Bold-5c... https://www.cia.gov/static/GT-America-Mono-Bold-5cb65dbcadbc053b4803a3de9e5204a1.woff2 — 35.6 KiB — 122 ms — font-display: swaphttps://www.cia.gov/static/GT-America-Mono-Regular-72bfafe2cef91603f08edde5514a0afb.woff2GT-America-Mono-Regular... https://www.cia.gov/static/GT-America-Mono-Regular-72bfafe2cef91603f08edde5514a0afb.woff2 — 34.6 KiB — 129 ms — font-display: swaphttps://www.cia.gov/static/PublicSans-Bold-c5f1403759929abd85bf95108c08b4ac.woff2PublicSans-Bold-c5f1403... https://www.cia.gov/static/PublicSans-Bold-c5f1403759929abd85bf95108c08b4ac.woff2 — 33.3 KiB — 144 ms — font-display: swaphttps://www.cia.gov/static/GT-Sectra-Fine-Bold-23b3344434247f9eb8cabd9f5e923ee3.woff2GT-Sectra-Fine-Bold-23b... https://www.cia.gov/static/GT-Sectra-Fine-Bold-23b3344434247f9eb8cabd9f5e923ee3.woff2 — 69.6 KiB — 117 ms — font-display: swaphttps://www.cia.gov/static/PublicSans-ExtraBold-06e2dc3ec7db555110e527b86b93d913.woff2PublicSans-ExtraBold-06... https://www.cia.gov/static/PublicSans-ExtraBold-06e2dc3ec7db555110e527b86b93d913.woff2 — 30.0 KiB — 174 ms — font-display: swaphttps://www.cia.gov/static/PublicSans-Bold-a239fb971af47134c0c330b3d38f8288.woffPublicSans-Bold-a239fb9... https://www.cia.gov/static/PublicSans-Bold-a239fb971af47134c0c330b3d38f8288.woff — 41.2 KiB — 137 ms — font-display: swap
PublicSans-Light-05ff7d... woff swap
Size 41 KB
Load time 102 ms
Start 781 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
GT-America-Mono-Bold-5c... woff2 swap
Size 36 KB
Load time 122 ms
Start 782 ms
Risk FOUT — text flashes from fallback to web font
GT-America-Mono-Regular... woff2 swap
Size 35 KB
Load time 129 ms
Start 782 ms
Risk FOUT — text flashes from fallback to web font
PublicSans-Bold-c5f1403... woff2 swap
Size 33 KB
Load time 144 ms
Start 783 ms
Risk FOUT — text flashes from fallback to web font
GT-Sectra-Fine-Bold-23b... woff2 swap
Size 70 KB
Load time 117 ms
Start 783 ms
Risk FOUT — text flashes from fallback to web font
PublicSans-ExtraBold-06... woff2 swap
Size 30 KB
Load time 174 ms
Start 818 ms
Risk FOUT — text flashes from fallback to web font
PublicSans-Bold-a239fb9... woff swap
Size 41 KB
Load time 137 ms
Start 879 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~25 KB and ~50 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
61 requests over 1826ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 663 ms LCP 1.5 shttps://cia.gov// https://cia.gov/ — 301 — 227 B — 254 ms — h2https://www.cia.gov/www.cia.gov/ https://www.cia.gov/ — 200 — 59.5 KiB — 220 ms — h2https://www.cia.gov/js2/pubkey.jswww.cia.gov/js2/pubkey.js https://www.cia.gov/js2/pubkey.js — 200 — 822 B — 87 ms — h2https://www.cia.gov/js2/verification.jswww.cia.gov/js2/verification.js https://www.cia.gov/js2/verification.js — 200 — 26.8 KiB — 245 ms — h2https://www.cia.gov/static/cia-seal-5d0a426b2dbe873ce776829bd8f8f6c6.pngwww.cia.gov/static/cia-seal-5d0a426... https://www.cia.gov/static/cia-seal-5d0a426b2dbe873ce776829bd8f8f6c6.png — 200 — 26.7 KiB — 253 ms — h2https://www.cia.gov/static/7f79f658a21a4953a08247de220d6233/bbd9a/hero-nathan-hale.webpwww.cia.gov/static/7f79f658a21a4953... https://www.cia.gov/static/7f79f658a21a4953a08247de220d6233/bbd9a/hero-nathan-hale.webp — 200 — 160.5 KiB — 225 ms — h2https://www.cia.gov/manifest.webmanifestwww.cia.gov/manifest.webmanifest https://www.cia.gov/manifest.webmanifest — 200 — 744 B — 253 ms — h2https://www.cia.gov/webpack-runtime-bdd5a6fdb7a99f3d72d4.jswww.cia.gov/webpack-runtime-bdd5a6f... https://www.cia.gov/webpack-runtime-bdd5a6fdb7a99f3d72d4.js — 200 — 2.9 KiB — 95 ms — h2https://www.cia.gov/framework-481beeb6bc5ccc2a4757.jswww.cia.gov/framework-481beeb6bc5cc... https://www.cia.gov/framework-481beeb6bc5ccc2a4757.js — 200 — 43.5 KiB — 119 ms — h2https://www.cia.gov/app-bd3d900226fb938894f0.jswww.cia.gov/app-bd3d900226fb938894f... https://www.cia.gov/app-bd3d900226fb938894f0.js — 200 — 26.6 KiB — 117 ms — h2https://www.cia.gov/js2/languages.jswww.cia.gov/js2/languages.js https://www.cia.gov/js2/languages.js — 200 — 9.2 KiB — 102 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg%20height='1707'%20width='2560'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1707'%20width='2560'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='2000'%20width='3000'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='2000'%20width='3000'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://www.cia.gov/static/PublicSans-Light-05ff7d7149c9a6d61fc10c3842f14215.woffwww.cia.gov/static/PublicSans-Light... https://www.cia.gov/static/PublicSans-Light-05ff7d7149c9a6d61fc10c3842f14215.woff — 200 — 41.0 KiB — 102 ms — h2https://www.cia.gov/static/GT-America-Mono-Bold-5cb65dbcadbc053b4803a3de9e5204a1.woff2www.cia.gov/static/GT-America-Mono-... https://www.cia.gov/static/GT-America-Mono-Bold-5cb65dbcadbc053b4803a3de9e5204a1.woff2 — 200 — 35.6 KiB — 122 ms — h2https://www.cia.gov/static/GT-America-Mono-Regular-72bfafe2cef91603f08edde5514a0afb.woff2www.cia.gov/static/GT-America-Mono-... https://www.cia.gov/static/GT-America-Mono-Regular-72bfafe2cef91603f08edde5514a0afb.woff2 — 200 — 34.6 KiB — 129 ms — h2https://www.cia.gov/static/PublicSans-Bold-c5f1403759929abd85bf95108c08b4ac.woff2www.cia.gov/static/PublicSans-Bold-... https://www.cia.gov/static/PublicSans-Bold-c5f1403759929abd85bf95108c08b4ac.woff2 — 200 — 33.3 KiB — 144 ms — h2https://www.cia.gov/static/GT-Sectra-Fine-Bold-23b3344434247f9eb8cabd9f5e923ee3.woff2www.cia.gov/static/GT-Sectra-Fine-B... https://www.cia.gov/static/GT-Sectra-Fine-Bold-23b3344434247f9eb8cabd9f5e923ee3.woff2 — 200 — 69.6 KiB — 117 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg%20height='504'%20width='504'%20xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml;charset=utf-8,%3Csvg%20height='504'%20width='504'%20xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='360'%20width='360'%20xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml;charset=utf-8,%3Csvg%20height='360'%20width='360'%20xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='3328'%20width='4992'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='3328'%20width='4992'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='2661'%20width='2661'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='2661'%20width='2661'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://www.cia.gov/static/45ea7dd1005ab17954c801e9575bb7ae/41aff/ohb.jpgwww.cia.gov/static/45ea7dd1005ab179... https://www.cia.gov/static/45ea7dd1005ab17954c801e9575bb7ae/41aff/ohb.jpg — 200 — 1.0 MiB — 295 ms — h2https://www.cia.gov/static/19d99e5def8deaaf9b036d799503ad9d/e4d88/e-st-hq.pngwww.cia.gov/static/19d99e5def8deaaf... https://www.cia.gov/static/19d99e5def8deaaf9b036d799503ad9d/e4d88/e-st-hq.png — 200 — 124.0 KiB — 260 ms — h2https://www.cia.gov/static/PublicSans-ExtraBold-06e2dc3ec7db555110e527b86b93d913.woff2www.cia.gov/static/PublicSans-Extra... https://www.cia.gov/static/PublicSans-ExtraBold-06e2dc3ec7db555110e527b86b93d913.woff2 — 200 — 30.0 KiB — 174 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='100'%20width='100'%20xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml;charset=utf-8,%3Csvg%20height='100'%20width='100'%20xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datahttps://www.cia.gov/static/3c9608a333b538844f39be181eda1928/6426e/Paul-Revere.jpgwww.cia.gov/static/3c9608a333b53884... https://www.cia.gov/static/3c9608a333b538844f39be181eda1928/6426e/Paul-Revere.jpg — 200 — 131.0 KiB — 252 ms — h2https://www.cia.gov/static/e7bea8aa95dc0e88d424697ca2d4aca8/34e0f/Stories-Prelude-to-COLDFEETwebtile.jpgwww.cia.gov/static/e7bea8aa95dc0e88... https://www.cia.gov/static/e7bea8aa95dc0e88d424697ca2d4aca8/34e0f/Stories-Prelude-to-COLDFEETwebtile.jpg — 200 — 96.0 KiB — 255 ms — h2https://www.cia.gov/static/eee5f06146c38b7634f6e11d4cb8c290/34e0f/Stories-5-Lessons-in-Spying-Courtesy-of-George-Washingtonwebtile-copy.jpgwww.cia.gov/static/eee5f06146c38b76... https://www.cia.gov/static/eee5f06146c38b7634f6e11d4cb8c290/34e0f/Stories-5-Lessons-in-Spying-Courtesy-of-George-Washingtonwebtile-copy.jpg — 200 — 62.9 KiB — 258 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 663 ms LCP 1.5 shttps://cia.gov// https://cia.gov/ — 301 — 227 B — 254 ms — h2https://www.cia.gov/www.cia.gov/ https://www.cia.gov/ — 200 — 59.5 KiB — 220 ms — h2https://www.cia.gov/js2/pubkey.jswww.cia.gov/js2/pubkey.js https://www.cia.gov/js2/pubkey.js — 200 — 822 B — 87 ms — h2https://www.cia.gov/js2/verification.jswww.cia.gov/js2/verification.js https://www.cia.gov/js2/verification.js — 200 — 26.8 KiB — 245 ms — h2https://www.cia.gov/static/cia-seal-5d0a426b2dbe873ce776829bd8f8f6c6.pngwww.cia.gov/static/cia-seal-5d0a426... https://www.cia.gov/static/cia-seal-5d0a426b2dbe873ce776829bd8f8f6c6.png — 200 — 26.7 KiB — 253 ms — h2https://www.cia.gov/static/7f79f658a21a4953a08247de220d6233/bbd9a/hero-nathan-hale.webpwww.cia.gov/static/7f79f658a21a4953... https://www.cia.gov/static/7f79f658a21a4953a08247de220d6233/bbd9a/hero-nathan-hale.webp — 200 — 160.5 KiB — 225 ms — h2https://www.cia.gov/manifest.webmanifestwww.cia.gov/manifest.webmanifest https://www.cia.gov/manifest.webmanifest — 200 — 744 B — 253 ms — h2https://www.cia.gov/webpack-runtime-bdd5a6fdb7a99f3d72d4.jswww.cia.gov/webpack-runtime-bdd5a6f... https://www.cia.gov/webpack-runtime-bdd5a6fdb7a99f3d72d4.js — 200 — 2.9 KiB — 95 ms — h2https://www.cia.gov/framework-481beeb6bc5ccc2a4757.jswww.cia.gov/framework-481beeb6bc5cc... https://www.cia.gov/framework-481beeb6bc5ccc2a4757.js — 200 — 43.5 KiB — 119 ms — h2https://www.cia.gov/app-bd3d900226fb938894f0.jswww.cia.gov/app-bd3d900226fb938894f... https://www.cia.gov/app-bd3d900226fb938894f0.js — 200 — 26.6 KiB — 117 ms — h2https://www.cia.gov/js2/languages.jswww.cia.gov/js2/languages.js https://www.cia.gov/js2/languages.js — 200 — 9.2 KiB — 102 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg%20height='1707'%20width='2560'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1707'%20width='2560'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — 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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 949ms · 122KB · $13/mo
www.cia.gov
Other
Costly
Execution 417ms
Transfer 59 KB
Monthly Cost $6/mo
www.cia.gov
Other
Costly
Execution 300ms
Transfer 43 KB
Monthly Cost $4/mo
Unattributable
Other
Optional
Execution 165ms
Transfer 0 KB
Monthly Cost $2/mo
www.cia.gov
Other
Optional
Execution 67ms
Transfer 19 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.cia.gov adds 417ms and costs ~$6/month
  • www.cia.gov adds 300ms 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.

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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.cia.gov takes 417ms 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.cia.gov takes 300ms 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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