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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
6
REVIEW
2
PASS
5
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.
95
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.
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.

938 ms

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

9.18 s

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

96 ms

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

0.024

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

2.33 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.

9.55 s

Page Load Progression

609 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.7 s
4.3 s
4.9 s
Checks
15
5 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
15.2 MB transferred, 67 requests
FIX
15.2 MB transferred, 67 requests
Critical::
Page weighs 17.7 MB (15.2 MB transferred)
Warning::
Images are 13.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 13.9 MB
Warning::
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Info::
67 HTTP requests
Info::
Estimated 3.2 g CO2 per page load
15.2 MB / 2.4 MB budget
15.2 MB transferred
67 requests
3.2 g CO2 per page load
Images 13.9 MiB 92%
JavaScript 1.0 MiB 7%
Fonts 135.2 KiB 1%
CSS 64.9 KiB 0%
HTML 11.4 KiB 0%
Other 3.9 KiB 0%
Other 837 B 0%
Other 824 B 0%
Other 547 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

Why this matters

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

Source: web.dev

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

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 (15.2 MiB of 15.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2118ms total JS execution
FIX
2118ms total JS execution
Warning::
https://www.fda.gov/files/js/js_slZ_u0aWJFEt1cH1Zw...: 502ms CPU time
Warning::
https://www.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/3cGi0kf...: 402ms CPU time
Warning::
https://www.fda.gov/: 297ms CPU time
Warning::
Unattributable: 294ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-273D...: 177ms CPU time
Warning::
Third-party scripts: 2118ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 29% Style & Layout 12% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.fda.gov/files/js/js_slZ_u0aWJFEt1cH1Zwii-QyLhaTNBO65LccU3zlOaaM.js?scope=footer&delta=0&language=en&theme=preview&include=eJxdjtEKwzAIRX-oJXsZ7G-CNS4NS6OotHRfv4VB2Pbo8XivmTlXitCgnl7QQv4DkyjthY6QKy9QZ0Mt4jYtzG6uIEFYeCcdoh1F3uM9QUTepBZoSKGvLF4vty_4cR6UirNGamuHGzW3AIisqXCLzrk_ZCurIycaPajwPCnnARLIjzBO5pH2Am1yXpY502ms152ms17ms3rd
https://www.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/3cGi0kft0fGDbLz73O/TAtmA10D/KFcZDXYv/bFAB402ms365ms30ms3rd
https://www.fda.gov/297ms2ms1ms3rd
Unattributable294ms18ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-273DTKB5QW177ms150ms22ms3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js134ms119ms6ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L115ms89ms25ms3rd
https://touchpoints.app.cloud.gov/touchpoints/d45bb814.js75ms26ms19ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M95XGZW68ms52ms15ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64f054ms11ms22ms3rd
D
JS Bundles
Action
15 scripts, 431 KB unused
FIX
15 scripts, 431 KB unused
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.fda.gov/files/js/js_slZ_u0aWJFEt1cH1Zw...: 68 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-273D...: 65 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-M95...: 63 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 62 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 431 KB
431 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64f0147 KB106 KB (72%)✓3rd
https://www.fda.gov/files/js/js_slZ_u0aWJFEt1cH1Zwii-QyLhaTNBO65LccU3zlOaaM.js?scope=footer&delta=0&language=en&theme=preview&include=eJxdjtEKwzAIRX-oJXsZ7G-CNS4NS6OotHRfv4VB2Pbo8XivmTlXitCgnl7QQv4DkyjthY6QKy9QZ0Mt4jYtzG6uIEFYeCcdoh1F3uM9QUTepBZoSKGvLF4vty_4cR6UirNGamuHGzW3AIisqXCLzrk_ZCurIycaPajwPCnnARLIjzBO5pH2Am1yXpY107 KB68 KB (63%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-273DTKB5QW171 KB65 KB (38%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M95XGZW131 KB63 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147 KB62 KB (42%)✓3rd
https://www.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/3cGi0kft0fGDbLz73O/TAtmA10D/KFcZDXYv/bFAB176 KB39 KB (22%)✓3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js55 KB29 KB (52%)✓3rd
https://script.crazyegg.com/pages/scripts/0024/3700.js3 KB—✓3rd
https://touchpoints.app.cloud.gov/touchpoints/d45bb814.js81 KB—✗3rd
https://dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js4 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
67 resources · 15.2 MB · 431 KB savings available
FIX
67 resources · 15.2 MB · 431 KB savings available
Warning::
Page weight 14.2 MB over 1MB target
Got: 15.2 MB Expected: ≤ 1 MB
Info::
~431 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
9 resources over 200KB
67 resources · 15.2 MiB · 66 third-party 14.2 MiB over 1MB target
Image 92% · 13.9 MiB
JavaScript 7% · 1.0 MiB
Font 1% · 135.2 KiB
CSS 0% · 64.9 KiB
Document 0% · 11.4 KiB
Other 0% · 5.3 KiB

~431.4 KiB of savings available

Remove unused JavaScript: 431.4 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache, no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
C
Image Optimization
Action
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
Warning::
https://www.fda.gov/themes/custom/preview/assets/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/FDA%20issues%20draft%20g... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/fda_scientists_working_i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/fda-launches-framework-f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/fda-precheck_1200x675.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/food-dyes-1200x675.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/futuristic_it_1600x900.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/themes/custom/preview/assets/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/strengthen_import_safety... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cg-1b082c1b-3db7-477f-9ca5-bd51a786b41e.s3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/themes/custom/preview/assets/i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.fda.gov/files/lad_1600x900.png 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.
30 images 13.9 MB
0 oversized -0 KB
30 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
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
5 fonts (135 KB)
PASS
5 fonts (135 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

135 KB total

Render-blocking

0

of 5

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 7.0 s 8.0 s 9.0 s FCP 938 ms LCP 9.2 sdata:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA… — 1.6 KiB — 213 ms — font-display: swaphttps://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-400-normal.woff2merriweather-latin-400-... https://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-400-normal.woff2 — 19.6 KiB — 69 ms — font-display: swaphttps://www.fda.gov/themes/custom/preview/fonts/fonts/fontawesome-webfont.woff2?v=4.7.0fontawesome-webfont.woff2 https://www.fda.gov/themes/custom/preview/fonts/fonts/fontawesome-webfont.woff2?v=4.7.0 — 75.4 KiB — 84 ms — font-display: swaphttps://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-400-italic.woff2merriweather-latin-400-... https://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-400-italic.woff2 — 19.3 KiB — 80 ms — font-display: swaphttps://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-700-normal.woff2merriweather-latin-700-... https://www.fda.gov/themes/custom/preview/fonts/fonts/merriweather-latin-700-normal.woff2 — 19.3 KiB — 68 ms — font-display: swap
font-woff;charset=utf-8... woff swap
Size 2 KB
Load time 213 ms
Start 304 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
merriweather-latin-400-... woff2 swap
Size 20 KB
Load time 69 ms
Start 350 ms
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont.woff2 woff2 swap
Size 75 KB
Load time 84 ms
Start 350 ms
Risk FOUT — text flashes from fallback to web font
merriweather-latin-400-... woff2 swap
Size 19 KB
Load time 80 ms
Start 351 ms
Risk FOUT — text flashes from fallback to web font
merriweather-latin-700-... woff2 swap
Size 19 KB
Load time 68 ms
Start 351 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
67 requests over 2548ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 938 ms LCP 9.2 shttps://fda.gov// https://fda.gov/ — 301 — 132 B — 29 ms — h2https://www.fda.gov/www.fda.gov/ https://www.fda.gov/ — 200 — 11.4 KiB — 37 ms — h2https://www.googletagmanager.com/gtag/js?id=G-273DTKB5QWwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-273DTKB5QW — 200 — 170.9 KiB — 44 ms — h2https://www.fda.gov/files/google_tag/production/google_tag.script.js?tc66tgwww.fda.gov/files/google_tag/produc... https://www.fda.gov/files/google_tag/production/google_tag.script.js?tc66tg — 200 — 570 B — 29 ms — h2https://www.fda.gov/files/css/css_ngvuTsoVGiC8heLt3khKQg-Yfb9hQMlIBChK5jUU1Oo.css?delta=0&language=en&theme=preview&include=eJxNzEsOgzAMBNALpfhIKCEuuJjYtZ0ibt_PAroZPY00M61YKcRGahVbFJZphT8nPzxwg5Idkxq-CHeYWUrmm8fB1Ob0eHa0Y-w01hyoNK1ocDFptjxb1sWhWtfMw9UMvWkvTL5gPf99J_3svnb45bBJ7YzpLhJNAh1OvQFXxk0gwww.fda.gov/files/css/css_ngvuTsoVG... https://www.fda.gov/files/css/css_ngvuTsoVGiC8heLt3khKQg-Yfb9hQMlIBChK5jUU1Oo.css?delta=0&language=en&theme=preview&include=eJxNzEsOgzAMBNALpfhIKCEuuJjYtZ0ibt_PAroZPY00M61YKcRGahVbFJZphT8nPzxwg5Idkxq-CHeYWUrmm8fB1Ob0eHa0Y-w01hyoNK1ocDFptjxb1sWhWtfMw9UMvWkvTL5gPf99J_3svnb45bBJ7YzpLhJNAh1OvQFXxk0g — 200 — 4.7 KiB — 24 ms — h2https://www.fda.gov/files/css/css_heM2VrvP8qpRl-VxjNn-7peZ85q1wzj-un9dG4jmDSA.css?delta=1&language=en&theme=preview&include=eJxNzEsOgzAMBNALpfhIKCEuuJjYtZ0ibt_PAroZPY00M61YKcRGahVbFJZphT8nPzxwg5Idkxq-CHeYWUrmm8fB1Ob0eHa0Y-w01hyoNK1ocDFptjxb1sWhWtfMw9UMvWkvTL5gPf99J_3svnb45bBJ7YzpLhJNAh1OvQFXxk0gwww.fda.gov/files/css/css_heM2VrvP8... https://www.fda.gov/files/css/css_heM2VrvP8qpRl-VxjNn-7peZ85q1wzj-un9dG4jmDSA.css?delta=1&language=en&theme=preview&include=eJxNzEsOgzAMBNALpfhIKCEuuJjYtZ0ibt_PAroZPY00M61YKcRGahVbFJZphT8nPzxwg5Idkxq-CHeYWUrmm8fB1Ob0eHa0Y-w01hyoNK1ocDFptjxb1sWhWtfMw9UMvWkvTL5gPf99J_3svnb45bBJ7YzpLhJNAh1OvQFXxk0g — 200 — 60.3 KiB — 60 ms — 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https://region1.analytics.google.com/g/collect?v=2&tid=G-273DTKB5QW&gtm=45je64f0v895148502za200zd895148502&_p=1776362914820&_gaz=1&gcd=13l3l3l2l3l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_eu=AAAAAGA&are=1&cid=1516276900.1776362916&frm=0&pscdl=noapi&rcb=0&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938468~117266400&sid=1776362915&sct=1&seg=0&dl=https%3A%2F%2Fwww.fda.gov%2F&dt=U.S.%20Food%20and%20Drug%20Administration&_tu=QA&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.page_placeholder=PLACEHOLDER_page_location&tfd=1329 — 204 — 547 B — 34 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-273DTKB5QW&cid=1516276900.1776362916&gtm=45je64f0v895148502za200zd895148502&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-273DTKB5QW&cid=1516276900.1776362916&gtm=45je64f0v895148502za200zd895148502&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400 — 204 — 547 B — 32 ms — h2https://www.google.nl/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-273DTKB5QW&cid=1516276900.1776362916&gtm=45je64f0v895148502za200zd895148502&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400&z=592127517www.google.nl/ads/ga-audiences?v=1&... https://www.google.nl/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-273DTKB5QW&cid=1516276900.1776362916&gtm=45je64f0v895148502za200zd895148502&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l3l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266400&z=592127517 — 200 — 408 B — 33 ms — h2https://script.crazyegg.com/pages/data-scripts/0024/3700/site/www.fda.gov.json?t=1script.crazyegg.com/pages/data-scri... https://script.crazyegg.com/pages/data-scripts/0024/3700/site/www.fda.gov.json?t=1 — 200 — 2.4 KiB — 25 ms — h3https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.jsscript.crazyegg.com/pages/versioned... https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js — 200 — 55.3 KiB — 18 ms — 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h2https://touchpoints.app.cloud.gov/img/usa-icons/unfold_more.svgtouchpoints.app.cloud.gov/img/usa-i... https://touchpoints.app.cloud.gov/img/usa-icons/unfold_more.svg — 200 — 495 B — 280 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 — 628 ms — h2https://cg-1b082c1b-3db7-477f-9ca5-bd51a786b41e.s3-us-gov-west-1.amazonaws.com/uploads/form/logo/6295/tag_FDA_logo(2).pngcg-1b082c1b-3db7-477f-9ca5-bd51a786... https://cg-1b082c1b-3db7-477f-9ca5-bd51a786b41e.s3-us-gov-west-1.amazonaws.com/uploads/form/logo/6295/tag_FDA_logo(2).png — 200 — 17.3 KiB — 807 ms — http/1.1https://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 — 224 ms — h2blob:https://www.fda.gov/e7c424ca-b218-48c2-877d-a987c2ebb6d4www.fda.gov/e7c424ca-b218-48c2-877d... blob:https://www.fda.gov/e7c424ca-b218-48c2-877d-a987c2ebb6d4 — -1 — 0 B — 0 ms — https://script.crazyegg.com/pages/data-scripts/0024/3700/sampling/www.fda.gov.json?t=1script.crazyegg.com/pages/data-scri... https://script.crazyegg.com/pages/data-scripts/0024/3700/sampling/www.fda.gov.json?t=1 — 200 — 399 B — 15 ms — h3https://tracking.crazyegg.com/clock?u=243700&st=140963&t=1776362916673&tk=c8224c0d1d68e5fe787bef2074ea82fdtracking.crazyegg.com/clock?u=24370... https://tracking.crazyegg.com/clock?u=243700&st=140963&t=1776362916673&tk=c8224c0d1d68e5fe787bef2074ea82fd — 204 — 0 B — 118 ms — h2https://pagestates-tracking.crazyegg.com/healthcheckpagestates-tracking.crazyegg.com/he... https://pagestates-tracking.crazyegg.com/healthcheck — 200 — 460 B — 24 ms — h2https://assets-tracking.crazyegg.com/healthcheckassets-tracking.crazyegg.com/health... https://assets-tracking.crazyegg.com/healthcheck — 200 — 462 B — 25 ms — h2blob:https://www.fda.gov/715d3cd2-2854-4ee3-8407-5dab8ce14e10www.fda.gov/715d3cd2-2854-4ee3-8407... blob:https://www.fda.gov/715d3cd2-2854-4ee3-8407-5dab8ce14e10 — 200 — -1 B — 58 ms — blobhttps://www.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/3cGi0kft0fGDbLz73O/TAtmA10D/KFcZDXYv/bFABwww.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/... https://www.fda.gov/nTKB/q8Ri/6s/BZ-3/8P-Q/3cGi0kft0fGDbLz73O/TAtmA10D/KFcZDXYv/bFAB — 201 — 43 B — 186 ms — h3https://tracking.crazyegg.com/clock?u=243700&st=140963&t=1776362916673&tk=c8224c0d1d68e5fe787bef2074ea82fdtracking.crazyegg.com/clock?u=24370... https://tracking.crazyegg.com/clock?u=243700&st=140963&t=1776362916673&tk=c8224c0d1d68e5fe787bef2074ea82fd — 200 — 142 B — 42 ms — h2blob:https://www.fda.gov/aeceef43-6ac8-4e07-b24a-b806da12bb90www.fda.gov/aeceef43-6ac8-4e07-b24a... blob:https://www.fda.gov/aeceef43-6ac8-4e07-b24a-b806da12bb90 — -1 — 0 B — 0 ms — https://www.fda.gov/themes/custom/preview/favicon.icowww.fda.gov/themes/custom/preview/f... 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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 2118ms · 851KB · $28/mo
www.fda.gov
Other
Costly
Execution 502ms
Transfer 107 KB
Unused 63%
Monthly Cost $7/mo
www.fda.gov
Other
Costly
Execution 402ms
Transfer 0 KB
Unused 22%
Monthly Cost $5/mo
www.fda.gov
Other
Costly
Execution 297ms
Transfer 11 KB
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 294ms
Transfer 0 KB
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Optional
Execution 177ms
Transfer 171 KB
Unused 38%
Monthly Cost $2/mo
script.crazyegg.com
Other
Optional
Execution 134ms
Transfer 55 KB
Unused 52%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 115ms
Transfer 147 KB
Unused 42%
Monthly Cost $2/mo
touchpoints.app.cloud.gov
Other
Optional
Execution 75ms
Transfer 81 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 68ms
Transfer 131 KB
Unused 49%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 54ms
Transfer 147 KB
Unused 72%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.fda.gov adds 502ms and costs ~$7/month
  • www.fda.gov adds 402ms and costs ~$5/month
  • www.fda.gov adds 297ms and costs ~$4/month
  • Unattributable adds 294ms 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

www.fda.gov takes 502ms 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

63% of www.fda.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

www.fda.gov takes 402ms 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.fda.gov takes 297ms 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 294ms 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

52% of script.crazyegg.com'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

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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