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https://yellowpages.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
97
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

748 ms

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

1.17 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.

0.000

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

918 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.

1.17 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
9 PASS 2 REVIEW 2 FIX
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 (682.8 KiB of 682.9 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
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
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
https://i2.ypcdn.com/ypu/images/svgs/small_avatar.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22 images 245 KB
0 oversized -0 KB
22 legacy format
1 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

C
JS Bundles
Action
11 scripts, 157 KB unused
REVIEW
11 scripts, 157 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0EQT...: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.c...: 54 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e...: 33 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 157 KB
157 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34W177 KB70 KB (40%)✓3rd
https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.custom.min.js?7e7947061 KB54 KB (90%)✓3rd
https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e7947067 KB33 KB (50%)✓3rd
https://i1.ypcdn.com/ypu/vendor/VisitorAPI.js?7e7947020 KB—✓3rd
https://i1.ypcdn.com/ypu/js/yp.js?7e794700 KB—✓3rd
https://i1.ypcdn.com/ypu/js/views/view.js?7e794701 KB—✓3rd
https://i1.ypcdn.com/ypu/js/compiled/desktop.js?7e7947028 KB—✓3rd
https://i1.ypcdn.com/ypu/js/compiled/homepage.js?7e794708 KB—✓3rd
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451611 KB—✓3rd
https://metrics.yellowpages.com/id?d_visid_ver=4.4.0&d_fieldgroup=MC&mcorgid=A57E776A5245AEA80A490D44%40AdobeOrg&ts=17768880063611 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

A+
Page Weight Budget
683 KB transferred, 50 requests
PASS
683 KB transferred, 50 requests
Info::
Page weighs 1.6 MB (683 KB transferred)
Info::
50 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
683 KB / 2.4 MB budget
683 KB transferred
50 requests
0.14 g CO2 per page load
JavaScript 384.4 KiB 56%
Images 244.7 KiB 36%
CSS 25.4 KiB 4%
HTML 21.1 KiB 3%
Other 3.3 KiB 0%
Other 2.9 KiB 0%
Other 552 B 0%
Other 552 B 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
491ms total JS execution
PASS
491ms total JS execution
Info::
Unattributable: 131ms CPU time
Info::
https://www.yellowpages.com/: 118ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-0EQT...: 94ms CPU time
Info::
https://www.yellowpages.com/cdn-cgi/challenge-plat...: 83ms CPU time
Info::
https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e...: 65ms CPU time
Warning::
Third-party scripts: 491ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 27% Style & Layout 13% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable131ms3ms0ms3rd
https://www.yellowpages.com/118ms13ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34W94ms78ms15ms3rd
https://www.yellowpages.com/cdn-cgi/challenge-platform/scripts/jsd/main.js83ms80ms1ms3rd
https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e7947065ms55ms5ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
50 resources · 683 KB · 157 KB savings available
PASS
50 resources · 683 KB · 157 KB savings available
Info::
Within 1MB page-weight target
Got: 683 KB
Info::
~157 KB of savings available
Warning::
49 third-party resources (100% of weight)
50 resources · 682.9 KiB · 49 third-party Within 1MB page-weight target
JavaScript 56% · 385.0 KiB
Image 36% · 245.4 KiB
CSS 4% · 25.4 KiB
Document 3% · 21.1 KiB
Other 1% · 5.9 KiB

~157.1 KiB of savings available

Remove unused JavaScript: 157.1 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
50 requests over 1066ms
INFO
0 ms 500 ms 1.0 s FCP 748 ms LCP 1.2 shttps://yellowpages.com// https://yellowpages.com/ — 301 — 99 B — 30 ms — h2https://www.yellowpages.com/www.yellowpages.com/ https://www.yellowpages.com/ — 200 — 17.9 KiB — 331 ms — h2https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34Wwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34W — 200 — 177.1 KiB — 160 ms — h2https://i1.ypcdn.com/ypu/vendor/VisitorAPI.js?7e79470i1.ypcdn.com/ypu/vendor/VisitorAPI.... https://i1.ypcdn.com/ypu/vendor/VisitorAPI.js?7e79470 — 200 — 20.1 KiB — 43 ms — h2https://i3.ypcdn.com/ypu/css/common.min.css?7e79470i3.ypcdn.com/ypu/css/common.min.css... https://i3.ypcdn.com/ypu/css/common.min.css?7e79470 — 200 — 10.1 KiB — 50 ms — h2https://i3.ypcdn.com/ypu/css/jquery-ui-1.10.3.custom.min.css?7e79470i3.ypcdn.com/ypu/css/jquery-ui-1.10... https://i3.ypcdn.com/ypu/css/jquery-ui-1.10.3.custom.min.css?7e79470 — 200 — 5.7 KiB — 52 ms — h2https://i1.ypcdn.com/ypu/css/home.min.css?7e79470i1.ypcdn.com/ypu/css/home.min.css?7... https://i1.ypcdn.com/ypu/css/home.min.css?7e79470 — 200 — 9.7 KiB — 39 ms — h2https://i3.ypcdn.com/ypu/images/svgs/log-in.svg?7e79470i3.ypcdn.com/ypu/images/svgs/log-in... https://i3.ypcdn.com/ypu/images/svgs/log-in.svg?7e79470 — 200 — 926 B — 47 ms — h2https://i2.ypcdn.com/ypu/images/svgs/sign-up.svg?7e79470i2.ypcdn.com/ypu/images/svgs/sign-u... https://i2.ypcdn.com/ypu/images/svgs/sign-up.svg?7e79470 — 200 — 1.1 KiB — 52 ms — h2https://dpm.demdex.net/id?d_visid_ver=4.4.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_verify=1&d_orgid=A57E776A5245AEA80A490D44%40AdobeOrg&d_nsid=0&ts=1776888006127dpm.demdex.net/id?d_visid_ver=4.4.0... https://dpm.demdex.net/id?d_visid_ver=4.4.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_verify=1&d_orgid=A57E776A5245AEA80A490D44%40AdobeOrg&d_nsid=0&ts=1776888006127 — 302 — 675 B — 180 ms — h2https://i2.ypcdn.com/ypu/images/svgs/small_avatar.svg?7e79470i2.ypcdn.com/ypu/images/svgs/small_... https://i2.ypcdn.com/ypu/images/svgs/small_avatar.svg?7e79470 — 200 — 838 B — 23 ms — h2https://i1.ypcdn.com/ypu/images/svgs/explore-cities.svg?7e79470i1.ypcdn.com/ypu/images/svgs/explor... https://i1.ypcdn.com/ypu/images/svgs/explore-cities.svg?7e79470 — 200 — 849 B — 20 ms — h2https://i3.ypcdn.com/ypu/images/svgs/download.svg?7e79470i3.ypcdn.com/ypu/images/svgs/downlo... https://i3.ypcdn.com/ypu/images/svgs/download.svg?7e79470 — 200 — 565 B — 33 ms — h2https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e79470i1.ypcdn.com/ypu/vendor/index.bundl... https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e79470 — 200 — 66.9 KiB — 79 ms — h2https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.custom.min.js?7e79470i2.ypcdn.com/ypu/vendor/jquery-ui-1... https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.custom.min.js?7e79470 — 200 — 60.7 KiB — 78 ms — h2https://i1.ypcdn.com/ypu/js/yp.js?7e79470i1.ypcdn.com/ypu/js/yp.js?7e79470 https://i1.ypcdn.com/ypu/js/yp.js?7e79470 — 200 — 400 B — 37 ms — h2https://i1.ypcdn.com/ypu/js/views/view.js?7e79470i1.ypcdn.com/ypu/js/views/view.js?7... https://i1.ypcdn.com/ypu/js/views/view.js?7e79470 — 200 — 1.3 KiB — 63 ms — h2https://i1.ypcdn.com/ypu/js/compiled/desktop.js?7e79470i1.ypcdn.com/ypu/js/compiled/deskto... https://i1.ypcdn.com/ypu/js/compiled/desktop.js?7e79470 — 200 — 27.6 KiB — 76 ms — h2https://i1.ypcdn.com/ypu/js/compiled/homepage.js?7e79470i1.ypcdn.com/ypu/js/compiled/homepa... https://i1.ypcdn.com/ypu/js/compiled/homepage.js?7e79470 — 200 — 7.5 KiB — 64 ms — h2https://c.ypcdn.com/2/p/webyp?ptid=www.yellowpages.com&rid=webyp-4f68f854-4de5-44c9-b1cf-d3d1d82c3d8d&vrid=4605f7fc-6ace-4e94-962a-8f7f14fa06fec.ypcdn.com/2/p/webyp?ptid=www.yell... https://c.ypcdn.com/2/p/webyp?ptid=www.yellowpages.com&rid=webyp-4f68f854-4de5-44c9-b1cf-d3d1d82c3d8d&vrid=4605f7fc-6ace-4e94-962a-8f7f14fa06fe — 200 — 540 B — 123 ms — h2https://i3.ypcdn.com/ypu/images/svgs/mobile_yp_logo.svg?7e79470i3.ypcdn.com/ypu/images/svgs/mobile... https://i3.ypcdn.com/ypu/images/svgs/mobile_yp_logo.svg?7e79470 — 200 — 1.2 KiB — 31 ms — h2https://i4.ypcdn.com/ypu/images/svgs/yp.svg?7e79470i4.ypcdn.com/ypu/images/svgs/yp.svg... https://i4.ypcdn.com/ypu/images/svgs/yp.svg?7e79470 — 200 — 2.8 KiB — 90 ms — h2https://i1.ypcdn.com/ypu/images/svgs/advertise-w-us.svg?7e79470i1.ypcdn.com/ypu/images/svgs/advert... https://i1.ypcdn.com/ypu/images/svgs/advertise-w-us.svg?7e79470 — 200 — 533 B — 38 ms — h2https://i4.ypcdn.com/ypu/images/home/claim.png?7e79470i4.ypcdn.com/ypu/images/home/claim.... https://i4.ypcdn.com/ypu/images/home/claim.png?7e79470 — 200 — 39.0 KiB — 91 ms — h2https://i1.ypcdn.com/ypu/images/home/qna.png?7e79470i1.ypcdn.com/ypu/images/home/qna.pn... https://i1.ypcdn.com/ypu/images/home/qna.png?7e79470 — 200 — 59.2 KiB — 57 ms — h2https://i2.ypcdn.com/ypu/images/home/advertise.jpg?7e79470i2.ypcdn.com/ypu/images/home/advert... https://i2.ypcdn.com/ypu/images/home/advertise.jpg?7e79470 — 200 — 29.1 KiB — 51 ms — h2https://i2.ypcdn.com/ypu/images/home/app.png?7e79470i2.ypcdn.com/ypu/images/home/app.pn... https://i2.ypcdn.com/ypu/images/home/app.png?7e79470 — 200 — 32.0 KiB — 44 ms — h2https://i1.ypcdn.com/ypu/images/home/badge_google_store.svg?7e79470i1.ypcdn.com/ypu/images/home/badge_... https://i1.ypcdn.com/ypu/images/home/badge_google_store.svg?7e79470 — 200 — 4.6 KiB — 59 ms — h2https://i4.ypcdn.com/ypu/images/home/badge_apple_store.svg?7e79470i4.ypcdn.com/ypu/images/home/badge_... https://i4.ypcdn.com/ypu/images/home/badge_apple_store.svg?7e79470 — 200 — 8.3 KiB — 76 ms — h2https://i1.ypcdn.com/ypu/images/intelius-logo.png?7e79470i1.ypcdn.com/ypu/images/intelius-lo... https://i1.ypcdn.com/ypu/images/intelius-logo.png?7e79470 — 200 — 1.4 KiB — 28 ms — h2
0 ms 500 ms 1.0 s FCP 748 ms LCP 1.2 shttps://yellowpages.com// https://yellowpages.com/ — 301 — 99 B — 30 ms — h2https://www.yellowpages.com/www.yellowpages.com/ https://www.yellowpages.com/ — 200 — 17.9 KiB — 331 ms — h2https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34Wwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-0EQTJQH34W — 200 — 177.1 KiB — 160 ms — h2https://i1.ypcdn.com/ypu/vendor/VisitorAPI.js?7e79470i1.ypcdn.com/ypu/vendor/VisitorAPI.... https://i1.ypcdn.com/ypu/vendor/VisitorAPI.js?7e79470 — 200 — 20.1 KiB — 43 ms — h2https://i3.ypcdn.com/ypu/css/common.min.css?7e79470i3.ypcdn.com/ypu/css/common.min.css... https://i3.ypcdn.com/ypu/css/common.min.css?7e79470 — 200 — 10.1 KiB — 50 ms — h2https://i3.ypcdn.com/ypu/css/jquery-ui-1.10.3.custom.min.css?7e79470i3.ypcdn.com/ypu/css/jquery-ui-1.10... https://i3.ypcdn.com/ypu/css/jquery-ui-1.10.3.custom.min.css?7e79470 — 200 — 5.7 KiB — 52 ms — h2https://i1.ypcdn.com/ypu/css/home.min.css?7e79470i1.ypcdn.com/ypu/css/home.min.css?7... https://i1.ypcdn.com/ypu/css/home.min.css?7e79470 — 200 — 9.7 KiB — 39 ms — h2https://i3.ypcdn.com/ypu/images/svgs/log-in.svg?7e79470i3.ypcdn.com/ypu/images/svgs/log-in... https://i3.ypcdn.com/ypu/images/svgs/log-in.svg?7e79470 — 200 — 926 B — 47 ms — h2https://i2.ypcdn.com/ypu/images/svgs/sign-up.svg?7e79470i2.ypcdn.com/ypu/images/svgs/sign-u... https://i2.ypcdn.com/ypu/images/svgs/sign-up.svg?7e79470 — 200 — 1.1 KiB — 52 ms — h2https://dpm.demdex.net/id?d_visid_ver=4.4.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_verify=1&d_orgid=A57E776A5245AEA80A490D44%40AdobeOrg&d_nsid=0&ts=1776888006127dpm.demdex.net/id?d_visid_ver=4.4.0... https://dpm.demdex.net/id?d_visid_ver=4.4.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_verify=1&d_orgid=A57E776A5245AEA80A490D44%40AdobeOrg&d_nsid=0&ts=1776888006127 — 302 — 675 B — 180 ms — h2https://i2.ypcdn.com/ypu/images/svgs/small_avatar.svg?7e79470i2.ypcdn.com/ypu/images/svgs/small_... https://i2.ypcdn.com/ypu/images/svgs/small_avatar.svg?7e79470 — 200 — 838 B — 23 ms — h2https://i1.ypcdn.com/ypu/images/svgs/explore-cities.svg?7e79470i1.ypcdn.com/ypu/images/svgs/explor... https://i1.ypcdn.com/ypu/images/svgs/explore-cities.svg?7e79470 — 200 — 849 B — 20 ms — h2https://i3.ypcdn.com/ypu/images/svgs/download.svg?7e79470i3.ypcdn.com/ypu/images/svgs/downlo... https://i3.ypcdn.com/ypu/images/svgs/download.svg?7e79470 — 200 — 565 B — 33 ms — h2https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e79470i1.ypcdn.com/ypu/vendor/index.bundl... https://i1.ypcdn.com/ypu/vendor/index.bundle.js?7e79470 — 200 — 66.9 KiB — 79 ms — h2https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.custom.min.js?7e79470i2.ypcdn.com/ypu/vendor/jquery-ui-1... https://i2.ypcdn.com/ypu/vendor/jquery-ui-1.10.3.custom.min.js?7e79470 — 200 — 60.7 KiB — 78 ms — h2https://i1.ypcdn.com/ypu/js/yp.js?7e79470i1.ypcdn.com/ypu/js/yp.js?7e79470 https://i1.ypcdn.com/ypu/js/yp.js?7e79470 — 200 — 400 B — 37 ms — h2https://i1.ypcdn.com/ypu/js/views/view.js?7e79470i1.ypcdn.com/ypu/js/views/view.js?7... https://i1.ypcdn.com/ypu/js/views/view.js?7e79470 — 200 — 1.3 KiB — 63 ms — h2https://i1.ypcdn.com/ypu/js/compiled/desktop.js?7e79470i1.ypcdn.com/ypu/js/compiled/deskto... https://i1.ypcdn.com/ypu/js/compiled/desktop.js?7e79470 — 200 — 27.6 KiB — 76 ms — h2https://i1.ypcdn.com/ypu/js/compiled/homepage.js?7e79470i1.ypcdn.com/ypu/js/compiled/homepa... https://i1.ypcdn.com/ypu/js/compiled/homepage.js?7e79470 — 200 — 7.5 KiB — 64 ms — h2https://c.ypcdn.com/2/p/webyp?ptid=www.yellowpages.com&rid=webyp-4f68f854-4de5-44c9-b1cf-d3d1d82c3d8d&vrid=4605f7fc-6ace-4e94-962a-8f7f14fa06fec.ypcdn.com/2/p/webyp?ptid=www.yell... https://c.ypcdn.com/2/p/webyp?ptid=www.yellowpages.com&rid=webyp-4f68f854-4de5-44c9-b1cf-d3d1d82c3d8d&vrid=4605f7fc-6ace-4e94-962a-8f7f14fa06fe — 200 — 540 B — 123 ms — h2https://i3.ypcdn.com/ypu/images/svgs/mobile_yp_logo.svg?7e79470i3.ypcdn.com/ypu/images/svgs/mobile... https://i3.ypcdn.com/ypu/images/svgs/mobile_yp_logo.svg?7e79470 — 200 — 1.2 KiB — 31 ms — h2https://i4.ypcdn.com/ypu/images/svgs/yp.svg?7e79470i4.ypcdn.com/ypu/images/svgs/yp.svg... https://i4.ypcdn.com/ypu/images/svgs/yp.svg?7e79470 — 200 — 2.8 KiB — 90 ms — h2https://i1.ypcdn.com/ypu/images/svgs/advertise-w-us.svg?7e79470i1.ypcdn.com/ypu/images/svgs/advert... https://i1.ypcdn.com/ypu/images/svgs/advertise-w-us.svg?7e79470 — 200 — 533 B — 38 ms — h2https://i4.ypcdn.com/ypu/images/home/claim.png?7e79470i4.ypcdn.com/ypu/images/home/claim.... https://i4.ypcdn.com/ypu/images/home/claim.png?7e79470 — 200 — 39.0 KiB — 91 ms — h2https://i1.ypcdn.com/ypu/images/home/qna.png?7e79470i1.ypcdn.com/ypu/images/home/qna.pn... https://i1.ypcdn.com/ypu/images/home/qna.png?7e79470 — 200 — 59.2 KiB — 57 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 491ms · 262KB · $7/mo
Unattributable
Other
Optional
Execution 131ms
Transfer 0 KB
Monthly Cost $2/mo
www.yellowpages.com
Other
Optional
Execution 118ms
Transfer 18 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 94ms
Transfer 177 KB
Unused 40%
Monthly Cost $1/mo
www.yellowpages.com
Other
Optional
Execution 83ms
Transfer 0 KB
Monthly Cost $1/mo
i1.ypcdn.com
Other
Optional
Execution 65ms
Transfer 67 KB
Unused 50%
Monthly Cost $1/mo

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

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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