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https://cookpad.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
67
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.
85
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.

866 ms

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

2.00 s

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

0 ms

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

0.043

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

870 ms

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

2.00 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
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
97% third-party, 0 ms blocking
FIX
97% third-party, 0 ms blocking
Warning::
Third-party code accounts for 97% of page weight (772.7 KiB of 792.8 KiB)
Info::
Third-party blocking time is low (0 ms)
97%
First-party Third-party
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
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Info::
All images are well-optimized
20 images 369 KB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
B
JS Bundles
30 scripts, 131 KB unused
REVIEW
30 scripts, 131 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-V9HW...: 89 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://global-web-assets.cpcdn.com/packs/js/9674-...: 22 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://global-web-assets.cpcdn.com/packs/js/3389-...: 21 KB unused (84%)
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.googletagmanager.com/gtag/js?id=G-V9HWNDL45E175 KB89 KB (51%)✓3rd
https://global-web-assets.cpcdn.com/packs/js/9674-fd786247d3cad7ec5fb5.js39 KB22 KB (57%)✓3rd
https://global-web-assets.cpcdn.com/packs/js/3389-76e0fa31a0a626787f58.js25 KB21 KB (84%)✓3rd
https://global-web-assets.cpcdn.com/packs/js/2842-8b3fa291e8f59c0a1016.chunk.js1 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/8924-111f4ffc0fbcf7a21c09.chunk.js2 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/application-fa35f85882f0bb5bf1b6.js18 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/cloudwatch_rum-7419805cd3f46aeb6902.js1 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/8953-b6ca56ea592136e6cb67.chunk.js1 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/356-f8692cb33e4d8d52c637.chunk.js1 KB—✓3rd
https://global-web-assets.cpcdn.com/packs/js/3079-4a6ea3a01164468bff90.chunk.js1 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
793 KB transferred, 63 requests
PASS
793 KB transferred, 63 requests
Info::
Page weighs 1.7 MB (793 KB transferred)
Info::
63 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
793 KB / 2.4 MB budget
793 KB transferred
63 requests
0.16 g CO2 per page load
Images 369.1 KiB 47%
JavaScript 334.9 KiB 42%
Fonts 35.8 KiB 5%
CSS 28.5 KiB 4%
HTML 16.5 KiB 2%
Other 4.8 KiB 1%
Other 2.2 KiB 0%
Other 1.2 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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+
JS Execution Cost
218ms total JS execution
PASS
218ms total JS execution
Info::
https://cookpad.com/es: 77ms CPU time
Info::
Unattributable: 74ms CPU time
Info::
https://global-web-assets.cpcdn.com/packs/js/appli...: 67ms CPU time
Warning::
Third-party scripts: 141ms (65% of total)

Main Thread Breakdown

Script Evaluation 45% Other 28% Style & Layout 13% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://cookpad.com/es77ms15ms1ms1st
Unattributable74ms1ms0ms3rd
https://global-web-assets.cpcdn.com/packs/js/application-fa35f85882f0bb5bf1b6.js67ms53ms2ms3rd
A+
Font Loading
3 fonts (36 KB)
PASS
3 fonts (36 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

36 KB total

Render-blocking

0

of 3

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 2.0 s FCP 866 ms LCP 2.0 shttps://use.typekit.net/af/74b049/00000000000000007735b97f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n4&v=3l https://use.typekit.net/af/74b049/00000000000000007735b97f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n4&v=3 — 11.9 KiB — 8 ms — font-display: swaphttps://use.typekit.net/af/9edcf7/00000000000000007735b988/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n5&v=3l https://use.typekit.net/af/9edcf7/00000000000000007735b988/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n5&v=3 — 11.9 KiB — 9 ms — font-display: swaphttps://use.typekit.net/af/e5635b/00000000000000007735b98f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n6&v=3l https://use.typekit.net/af/e5635b/00000000000000007735b98f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n6&v=3 — 11.9 KiB — 10 ms — font-display: swap
l woff2 swap
Size 12 KB
Load time 8 ms
Start 451 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 12 KB
Load time 9 ms
Start 452 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 12 KB
Load time 10 ms
Start 452 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
A
Page Weight Inventory
63 resources · 793 KB · 131 KB savings available
PASS
63 resources · 793 KB · 131 KB savings available
Info::
Within 1MB page-weight target
Got: 793 KB
Info::
~131 KB of savings available
Warning::
58 third-party resources (97% of weight)
63 resources · 792.8 KiB · 58 third-party Within 1MB page-weight target
Image 47% · 373.6 KiB
JavaScript 42% · 334.9 KiB
Font 5% · 35.8 KiB
CSS 4% · 28.5 KiB
Document 2% · 18.7 KiB
Other 0% · 1.4 KiB

~131.3 KiB of savings available

Remove unused JavaScript: 131.3 KiB
Network Waterfall
63 requests over 1101ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 866 ms LCP 2.0 shttps://cookpad.com// https://cookpad.com/ — 302 — 204 B — 5 ms — h2https://cookpad.com/es/es https://cookpad.com/es — 200 — 16.5 KiB — 251 ms — h2https://global-web-assets.cpcdn.com/packs/css/application-v2-1fc10fb9.cssglobal-web-assets.cpcdn.com/packs/c... https://global-web-assets.cpcdn.com/packs/css/application-v2-1fc10fb9.css — 200 — 26.2 KiB — 101 ms — h3https://global-web-assets.cpcdn.com/packs/css/print-4bd48ce3.cssglobal-web-assets.cpcdn.com/packs/c... https://global-web-assets.cpcdn.com/packs/css/print-4bd48ce3.css — 200 — 1.1 KiB — 70 ms — h3https://global-web-assets.cpcdn.com/packs/js/runtime-aa718064cb24b23a16a7.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/runtime-aa718064cb24b23a16a7.js — 200 — 7.1 KiB — 96 ms — h3https://global-web-assets.cpcdn.com/packs/js/9674-fd786247d3cad7ec5fb5.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/9674-fd786247d3cad7ec5fb5.js — 200 — 39.3 KiB — 114 ms — h3https://global-web-assets.cpcdn.com/packs/js/cloudwatch_rum-7419805cd3f46aeb6902.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/cloudwatch_rum-7419805cd3f46aeb6902.js — 200 — 1.2 KiB — 75 ms — h3https://use.typekit.net/zbz2cyk.cssuse.typekit.net/zbz2cyk.css https://use.typekit.net/zbz2cyk.css — 200 — 1.0 KiB — 9 ms — h2https://global-web-assets.cpcdn.com/assets/premium/premium_feature/hall_of_fame_recipes-c88c0c3e9b0a9baec1fcd84c066cc9c78eb79f44d4848ba4bac890e5e90e3786.webpglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/premium/premium_feature/hall_of_fame_recipes-c88c0c3e9b0a9baec1fcd84c066cc9c78eb79f44d4848ba4bac890e5e90e3786.webp — 200 — 85.3 KiB — 139 ms — h3https://p.typekit.net/p.css?s=1&k=zbz2cyk&ht=tk&f=40409.40410.40411.40412.40413.40414&a=63657241&app=typekit&e=cssp.typekit.net/p.css?s=1&k=zbz2cyk&h... https://p.typekit.net/p.css?s=1&k=zbz2cyk&ht=tk&f=40409.40410.40411.40412.40413.40414&a=63657241&app=typekit&e=css — 200 — 172 B — 7 ms — h2https://global-web-assets.cpcdn.com/assets/premium/premium_feature/access_rankings-a00e64c1f8635b8c1c34eaf988550afe8a389e92e5940ce77d5314833fdd5703.webpglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/premium/premium_feature/access_rankings-a00e64c1f8635b8c1c34eaf988550afe8a389e92e5940ce77d5314833fdd5703.webp — 200 — 123.8 KiB — 79 ms — h3https://cookpad.com/es/webapp_manifest/es/webapp_manifest https://cookpad.com/es/webapp_manifest — 200 — 1.2 KiB — 209 ms — h3https://global-web-assets.cpcdn.com/packs/js/5197-2c9b16242dfb340ebfe4.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/5197-2c9b16242dfb340ebfe4.js — 200 — 11.1 KiB — 47 ms — h3https://global-web-assets.cpcdn.com/packs/js/3389-76e0fa31a0a626787f58.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/3389-76e0fa31a0a626787f58.js — 200 — 25.1 KiB — 47 ms — h3https://global-web-assets.cpcdn.com/packs/js/application-fa35f85882f0bb5bf1b6.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/application-fa35f85882f0bb5bf1b6.js — 200 — 18.0 KiB — 46 ms — h3https://www.googletagmanager.com/gtag/js?id=G-V9HWNDL45Ewww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-V9HWNDL45E — 200 — 174.8 KiB — 211 ms — h2https://global-web-assets.cpcdn.com/assets/logo_circle-d106f02123de882fffdd2c06593eb2fd33f0ddf20418dd75ed72225bdb0e0ff7.pngglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/logo_circle-d106f02123de882fffdd2c06593eb2fd33f0ddf20418dd75ed72225bdb0e0ff7.png — 200 — 2.4 KiB — 40 ms — h3https://global-web-assets.cpcdn.com/assets/logo_text-da02013e64b510c60b109001fc44bcb7195f9e3105287817103b6cff4f8e0563.pngglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/logo_text-da02013e64b510c60b109001fc44bcb7195f9e3105287817103b6cff4f8e0563.png — 200 — 2.6 KiB — 45 ms — h3https://global-web-assets.cpcdn.com/assets/guest_user-411965b370bbbfc1433c4478633d4974e180b506f29555ff58032b0ab04c5b56.pngglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/guest_user-411965b370bbbfc1433c4478633d4974e180b506f29555ff58032b0ab04c5b56.png — 200 — 1.5 KiB — 44 ms — h3https://global-web-assets.cpcdn.com/assets/logo_cookpad_large-c79eec91e0cdec1a592f98f46f80fbaf51a213ddefb55437c942f4816967c772.pngglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/logo_cookpad_large-c79eec91e0cdec1a592f98f46f80fbaf51a213ddefb55437c942f4816967c772.png — 200 — 9.6 KiB — 39 ms — h3https://img-global.cpcdn.com/contest_banners/36562df2aec2352d/966x183cq80/banner.webpimg-global.cpcdn.com/contest_banner... https://img-global.cpcdn.com/contest_banners/36562df2aec2352d/966x183cq80/banner.webp — 200 — 19.2 KiB — 161 ms — h3https://img-global.cpcdn.com/contest_banners/88fefe134dd15c58/966x183cq80/banner.webpimg-global.cpcdn.com/contest_banner... https://img-global.cpcdn.com/contest_banners/88fefe134dd15c58/966x183cq80/banner.webp — 200 — 24.9 KiB — 142 ms — h3https://img-global.cpcdn.com/promotional_banners/b79b79c27365c800/966x183cq80/banner.webpimg-global.cpcdn.com/promotional_ba... https://img-global.cpcdn.com/promotional_banners/b79b79c27365c800/966x183cq80/banner.webp — 200 — 24.6 KiB — 139 ms — h3https://img-global.cpcdn.com/recipes/recipes_55221_v1397572158_receta_foto_00055221-xeiwx8n4z4xhwkwba9a8/280x96cq50/photo.webpimg-global.cpcdn.com/recipes/recipe... https://img-global.cpcdn.com/recipes/recipes_55221_v1397572158_receta_foto_00055221-xeiwx8n4z4xhwkwba9a8/280x96cq50/photo.webp — 200 — 4.3 KiB — 139 ms — h3https://img-global.cpcdn.com/recipes/f7caac86f301dfce/280x96f0.5_0.5_1.0q50/photo.webpimg-global.cpcdn.com/recipes/f7caac... https://img-global.cpcdn.com/recipes/f7caac86f301dfce/280x96f0.5_0.5_1.0q50/photo.webp — 200 — 3.7 KiB — 159 ms — h3https://img-global.cpcdn.com/recipes/0d242f424b769699/280x96cq50/photo.webpimg-global.cpcdn.com/recipes/0d242f... https://img-global.cpcdn.com/recipes/0d242f424b769699/280x96cq50/photo.webp — 200 — 4.0 KiB — 157 ms — h3https://static.cookpad.com/global/assets/images/es/button_google_play_store.svgstatic.cookpad.com/global/assets/im... https://static.cookpad.com/global/assets/images/es/button_google_play_store.svg — 200 — 3.7 KiB — 8 ms — h2https://static.cookpad.com/global/assets/images/es/button_apple_app_store.svgstatic.cookpad.com/global/assets/im... https://static.cookpad.com/global/assets/images/es/button_apple_app_store.svg — 200 — 4.4 KiB — 471 ms — h2https://global-web-assets.cpcdn.com/assets/footer/footer-210d183ce6443eb41fa78f10b270fb773bab56416e2680a35328f51e8ddf85d0.pngglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/footer/footer-210d183ce6443eb41fa78f10b270fb773bab56416e2680a35328f51e8ddf85d0.png — 200 — 14.6 KiB — 40 ms — h3https://use.typekit.net/af/74b049/00000000000000007735b97f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n4&v=3use.typekit.net/af/74b049/000000000... https://use.typekit.net/af/74b049/00000000000000007735b97f/30/l?primer=7fa3915bdafdf03041871920a205bef951d72bf64dd4c4460fb992e3ecc3a862&fvd=n4&v=3 — 200 — 11.9 KiB — 8 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 866 ms LCP 2.0 shttps://cookpad.com// https://cookpad.com/ — 302 — 204 B — 5 ms — h2https://cookpad.com/es/es https://cookpad.com/es — 200 — 16.5 KiB — 251 ms — h2https://global-web-assets.cpcdn.com/packs/css/application-v2-1fc10fb9.cssglobal-web-assets.cpcdn.com/packs/c... https://global-web-assets.cpcdn.com/packs/css/application-v2-1fc10fb9.css — 200 — 26.2 KiB — 101 ms — h3https://global-web-assets.cpcdn.com/packs/css/print-4bd48ce3.cssglobal-web-assets.cpcdn.com/packs/c... https://global-web-assets.cpcdn.com/packs/css/print-4bd48ce3.css — 200 — 1.1 KiB — 70 ms — h3https://global-web-assets.cpcdn.com/packs/js/runtime-aa718064cb24b23a16a7.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/runtime-aa718064cb24b23a16a7.js — 200 — 7.1 KiB — 96 ms — h3https://global-web-assets.cpcdn.com/packs/js/9674-fd786247d3cad7ec5fb5.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/9674-fd786247d3cad7ec5fb5.js — 200 — 39.3 KiB — 114 ms — h3https://global-web-assets.cpcdn.com/packs/js/cloudwatch_rum-7419805cd3f46aeb6902.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/cloudwatch_rum-7419805cd3f46aeb6902.js — 200 — 1.2 KiB — 75 ms — h3https://use.typekit.net/zbz2cyk.cssuse.typekit.net/zbz2cyk.css https://use.typekit.net/zbz2cyk.css — 200 — 1.0 KiB — 9 ms — h2https://global-web-assets.cpcdn.com/assets/premium/premium_feature/hall_of_fame_recipes-c88c0c3e9b0a9baec1fcd84c066cc9c78eb79f44d4848ba4bac890e5e90e3786.webpglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/premium/premium_feature/hall_of_fame_recipes-c88c0c3e9b0a9baec1fcd84c066cc9c78eb79f44d4848ba4bac890e5e90e3786.webp — 200 — 85.3 KiB — 139 ms — h3https://p.typekit.net/p.css?s=1&k=zbz2cyk&ht=tk&f=40409.40410.40411.40412.40413.40414&a=63657241&app=typekit&e=cssp.typekit.net/p.css?s=1&k=zbz2cyk&h... https://p.typekit.net/p.css?s=1&k=zbz2cyk&ht=tk&f=40409.40410.40411.40412.40413.40414&a=63657241&app=typekit&e=css — 200 — 172 B — 7 ms — h2https://global-web-assets.cpcdn.com/assets/premium/premium_feature/access_rankings-a00e64c1f8635b8c1c34eaf988550afe8a389e92e5940ce77d5314833fdd5703.webpglobal-web-assets.cpcdn.com/assets/... https://global-web-assets.cpcdn.com/assets/premium/premium_feature/access_rankings-a00e64c1f8635b8c1c34eaf988550afe8a389e92e5940ce77d5314833fdd5703.webp — 200 — 123.8 KiB — 79 ms — h3https://cookpad.com/es/webapp_manifest/es/webapp_manifest https://cookpad.com/es/webapp_manifest — 200 — 1.2 KiB — 209 ms — h3https://global-web-assets.cpcdn.com/packs/js/5197-2c9b16242dfb340ebfe4.jsglobal-web-assets.cpcdn.com/packs/j... https://global-web-assets.cpcdn.com/packs/js/5197-2c9b16242dfb340ebfe4.js — 200 — 11.1 KiB — 47 ms — h3https://global-web-assets.cpcdn.com/packs/js/3389-76e0fa31a0a626787f58.jsglobal-web-assets.cpcdn.com/packs/j... 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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
65% of JavaScript execution is third-party
First-party Third-party 141ms · 18KB · €2/mo
Unattributable
Other
Optional
Execution 74ms
Transfer 0 KB
Monthly Cost €1/mo
global-web-assets.cpcdn.com
Other
Optional
Execution 67ms
Transfer 18 KB
Monthly Cost €1/mo

65% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

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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