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https://yahoo.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
2
PASS
9
INFO
1

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

Mobile Desktop
87
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.

1.55 s

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

1.68 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.

1.55 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.

1.68 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
14
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 (178.5 KiB of 178.8 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, no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
B
Image Optimization
6 images, 0 KB saveable
REVIEW
6 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.
6 images 79 KB
0 oversized -0 KB
6 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
179 KB transferred, 16 requests
PASS
179 KB transferred, 16 requests
Info::
Page weighs 584 KB (179 KB transferred)
Info::
16 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
179 KB / 2.4 MB budget
179 KB transferred
16 requests
0.04 g CO2 per page load
Images 78.8 KiB 44%
JavaScript 40.7 KiB 23%
CSS 39.3 KiB 22%
HTML 15.6 KiB 9%
Other 3.8 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
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 46% Style & Layout 19% Script Evaluation 19% Parse HTML & CSS 9% Script Parsing & Compilation 5%
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
16 resources · 179 KB · 0 KB savings available
PASS
16 resources · 179 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 179 KB
Warning::
15 third-party resources (100% of weight)
16 resources · 178.8 KiB · 15 third-party Within 1MB page-weight target
Image 45% · 80.7 KiB
JavaScript 23% · 40.7 KiB
CSS 22% · 39.3 KiB
Document 10% · 17.2 KiB
Other 0% · 802 B
Network Waterfall
16 requests over 1191ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.6 s LCP 1.7 shttps://yahoo.com// https://yahoo.com/ — 301 — 215 B — 425 ms — h2https://www.yahoo.com/www.yahoo.com/ https://www.yahoo.com/ — 307 — 1.4 KiB — 102 ms — http/1.1https://guce.yahoo.com/consent?brandType=nonEu&gcrumb=XrRzCaI&done=https%3A%2F%2Fwww.yahoo.com%2Fguce.yahoo.com/consent?brandType=no... https://guce.yahoo.com/consent?brandType=nonEu&gcrumb=XrRzCaI&done=https%3A%2F%2Fwww.yahoo.com%2F — 302 — 295 B — 193 ms — http/1.1https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_2f76f5bc-2570-4967-96bc-cadf968c7c7cconsent.yahoo.com/v2/collectConsent... https://consent.yahoo.com/v2/collectConsent?sessionId=3_cc-session_2f76f5bc-2570-4967-96bc-cadf968c7c7c — 200 — 15.6 KiB — 217 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 — 39.3 KiB — 103 ms — http/1.1https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_p_bestfit_frontpage.pngs.yimg.com/rz/p/yahoo_frontpage_en-... https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_p_bestfit_frontpage.png — 200 — 1.4 KiB — 81 ms — http/1.1https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_w_bestfit_frontpage.pngs.yimg.com/rz/p/yahoo_frontpage_en-... https://s.yimg.com/rz/p/yahoo_frontpage_en-US_s_f_w_bestfit_frontpage.png — 200 — 1.4 KiB — 81 ms — http/1.1https://consent.yahoo.com/static/images/close.svgconsent.yahoo.com/static/images/clo... https://consent.yahoo.com/static/images/close.svg — 200 — 1003 B — 38 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 — 22.5 KiB — 100 ms — http/1.1https://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 — 18.2 KiB — 99 ms — http/1.1https://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_2f76f5bc-2570-4967-96bc-cadf968c7c7cconsent.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_2f76f5bc-2570-4967-96bc-cadf968c7c7c — 204 — 142 B — 79 ms — http/1.1https://s.yimg.com/oa/build/images/fr-FR-home_11f60c18d02223c8.jpegs.yimg.com/oa/build/images/fr-FR-ho... https://s.yimg.com/oa/build/images/fr-FR-home_11f60c18d02223c8.jpeg — 200 — 72.9 KiB — 51 ms — http/1.1https://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 — 1.9 KiB — 29 ms — http/1.1https://udc.yahoo.com/v2/public/yql?yhlVer=2&yhlClient=rapid&yhlS=1197812781&yhlCT=2&yhlBTMS=1776358692070&yhlClientVer=3.53.30&yhlRnd=IWKY4dqaIpddwBP8&yhlCompressed=0udc.yahoo.com/v2/public/yql?yhlVer=... https://udc.yahoo.com/v2/public/yql?yhlVer=2&yhlClient=rapid&yhlS=1197812781&yhlCT=2&yhlBTMS=1776358692070&yhlClientVer=3.53.30&yhlRnd=IWKY4dqaIpddwBP8&yhlCompressed=0 — 204 — 365 B — 112 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_2f76f5bc-2570-4967-96bc-cadf968c7c7cconsent.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_2f76f5bc-2570-4967-96bc-cadf968c7c7c — 204 — 142 B — 42 ms — http/1.1https://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 — 2.0 KiB — 27 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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