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https://yahoo.net

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
70
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
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.
91
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.

4.55 s

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

4.98 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.

4.55 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.

4.99 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
17
11 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 (132.1 KiB of 132.4 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Warning::
https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7 images 34 KB
0 oversized -0 KB
7 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
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
132 KB transferred, 17 requests
PASS
132 KB transferred, 17 requests
Info::
Page weighs 544 KB (132 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
132 KB / 2.4 MB budget
132 KB transferred
17 requests
0.03 g CO2 per page load
JavaScript 39.9 KiB 30%
CSS 39.1 KiB 30%
Images 34.2 KiB 26%
HTML 15.6 KiB 12%
Other 3.1 KiB 2%
Other 365 B 0%
Other 142 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
289ms total JS execution
PASS
289ms total JS execution
Info::
https://consent.yahoo.com/v2/collectConsent?sessio...: 155ms CPU time
Info::
Unattributable: 134ms CPU time
Warning::
Third-party scripts: 289ms (100% of total)

Main Thread Breakdown

Other 45% Style & Layout 22% Script Evaluation 17% Parse HTML & CSS 9% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936a155ms29ms2ms3rd
Unattributable134ms5ms0ms3rd
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
JS Bundles
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
Warning::
https://s.yimg.com/oa/build/js/site-b61979ba.js: unminified — 8 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.yimg.com/oa/build/js/site-b61979ba.js22 KB—✗3rd
https://s.yimg.com/ss/rapid-3.53.30.js18 KB—✓3rd
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
17 resources · 132 KB · 0 KB savings available
PASS
17 resources · 132 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 132 KB
Warning::
16 third-party resources (100% of weight)
17 resources · 132.4 KiB · 16 third-party Within 1MB page-weight target
JavaScript 30% · 39.9 KiB
CSS 30% · 39.1 KiB
Image 27% · 35.8 KiB
Document 13% · 16.8 KiB
Other 1% · 802 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
17 requests over 1131ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 4.5 s LCP 5.0 shttps://yahoo.net// https://yahoo.net/ — 301 — 327 B — 146 ms — h2https://www.yahoo.com/www.yahoo.com/ https://www.yahoo.com/ — 307 — 908 B — 119 ms — h2https://guce.yahoo.com/consent?brandType=nonEu&gcrumb=COjQXOk&done=https%3A%2F%2Fwww.yahoo.com%2Fguce.yahoo.com/consent?brandType=no... https://guce.yahoo.com/consent?brandType=nonEu&gcrumb=COjQXOk&done=https%3A%2F%2Fwww.yahoo.com%2F — 302 — 295 B — 242 ms — http/1.1https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936aconsent.yahoo.com/v2/collectConsent... https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936a — 200 — 15.6 KiB — 260 ms — http/1.1https://s.yimg.com/oa/build/css/site-ltr-281e5c2a.csss.yimg.com/oa/build/css/site-ltr-28... https://s.yimg.com/oa/build/css/site-ltr-281e5c2a.css — 200 — 39.1 KiB — 150 ms — h2https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_p_bestfit_frontpage_2x.pngs.yimg.com/rz/p/yahoo_frontpage_en-... https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_p_bestfit_frontpage_2x.png — 200 — 1.6 KiB — 147 ms — h2https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_w_bestfit_frontpage_2x.pngs.yimg.com/rz/p/yahoo_frontpage_en-... https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_w_bestfit_frontpage_2x.png — 200 — 1.6 KiB — 163 ms — h2https://consent.yahoo.com/static/images/close.svgconsent.yahoo.com/static/images/clo... https://consent.yahoo.com/static/images/close.svg — 200 — 1003 B — 41 ms — http/1.1https://s.yimg.com/oa/build/js/site-b61979ba.jss.yimg.com/oa/build/js/site-b61979b... https://s.yimg.com/oa/build/js/site-b61979ba.js — 200 — 22.1 KiB — 160 ms — h2https://s.yimg.com/ss/rapid-3.53.30.jss.yimg.com/ss/rapid-3.53.30.js https://s.yimg.com/ss/rapid-3.53.30.js — 200 — 17.8 KiB — 162 ms — h2https://consent.yahoo.com/beacon?tag=TCF2&step=Layer1-View&brandDomain=www.yahoo.com&brandBid=&userType=nonreg&sdk=false&tos=fr-FR&country=FR&x=&sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936aconsent.yahoo.com/beacon?tag=TCF2&s... https://consent.yahoo.com/beacon?tag=TCF2&step=Layer1-View&brandDomain=www.yahoo.com&brandBid=&userType=nonreg&sdk=false&tos=fr-FR&country=FR&x=&sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936a — 204 — 142 B — 84 ms — http/1.1https://s.yimg.com/oa/build/images/fr-FR-mobile_51d6df5aad9efb1c.jpegs.yimg.com/oa/build/images/fr-FR-mo... https://s.yimg.com/oa/build/images/fr-FR-mobile_51d6df5aad9efb1c.jpeg — 200 — 27.8 KiB — 31 ms — h2https://s.yimg.com/oa/build/images/help-circle-solid-black_f68609a66d5b78e7.svgs.yimg.com/oa/build/images/help-cir... https://s.yimg.com/oa/build/images/help-circle-solid-black_f68609a66d5b78e7.svg — 200 — 1.5 KiB — 30 ms — h2https://udc.yahoo.com/v2/public/yql?yhlVer=2&yhlClient=rapid&yhlS=1197812781&yhlCT=2&yhlBTMS=1776892876435&yhlClientVer=3.53.30&yhlRnd=ueMoDNdAx28gWODH&yhlCompressed=0udc.yahoo.com/v2/public/yql?yhlVer=... https://udc.yahoo.com/v2/public/yql?yhlVer=2&yhlClient=rapid&yhlS=1197812781&yhlCT=2&yhlBTMS=1776892876435&yhlClientVer=3.53.30&yhlRnd=ueMoDNdAx28gWODH&yhlCompressed=0 — 204 — 365 B — 144 ms — h2https://consent.yahoo.com/beacon?tag=TCF2&step=Layer1-View-Js&brandDomain=www.yahoo.com&brandBid=&userType=nonreg&sdk=false&tos=fr-FR&country=FR&x=&sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936aconsent.yahoo.com/beacon?tag=TCF2&s... https://consent.yahoo.com/beacon?tag=TCF2&step=Layer1-View-Js&brandDomain=www.yahoo.com&brandBid=&userType=nonreg&sdk=false&tos=fr-FR&country=FR&x=&sessionId=3_cc-session_50da5743-9448-4a8e-aaf4-e8128a51936a — 204 — 142 B — 44 ms — http/1.1https://s.yimg.com/oa/build/images/scroll-arrow-2x_673d08f24769fbac.pngs.yimg.com/oa/build/images/scroll-a... https://s.yimg.com/oa/build/images/scroll-arrow-2x_673d08f24769fbac.png — 200 — 799 B — 29 ms — h2https://s.yimg.com/oa/build/images/favicons/yahoo.pngs.yimg.com/oa/build/images/favicons... https://s.yimg.com/oa/build/images/favicons/yahoo.png — 200 — 1.6 KiB — 28 ms — h2
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 289ms · 16KB · $4/mo
consent.yahoo.com
Other
Optional
Execution 155ms
Transfer 16 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 134ms
Transfer 0 KB
Monthly Cost $2/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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