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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
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.

1.16 s

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

1.40 s

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

11 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.

1.16 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.

2.09 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
6 PASS 5 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 (1.4 MiB of 1.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
58 resources · 1.4 MB · 139 KB savings available
FIX
58 resources · 1.4 MB · 139 KB savings available
Warning::
Page weight 453 KB over 1MB target
Got: 1.4 MB Expected: ≤ 1 MB
Info::
~139 KB of savings available
Warning::
57 third-party resources (100% of weight)
58 resources · 1.4 MiB · 57 third-party 453.1 KiB over 1MB target
Image 48% · 705.8 KiB
JavaScript 29% · 422.0 KiB
Font 10% · 144.9 KiB
CSS 9% · 134.9 KiB
Document 4% · 60.6 KiB
Other 1% · 8.8 KiB

~139.4 KiB of savings available

Remove unused JavaScript: 139.4 KiB
B
Page Weight Budget
1.4 MB transferred, 58 requests
REVIEW
1.4 MB transferred, 58 requests
Info::
Page weighs 3.4 MB (1.4 MB transferred)
Info::
58 HTTP requests
Info::
Estimated 0.30 g CO2 per page load
1.4 MB / 2.4 MB budget
1.4 MB transferred
58 requests
0.30 g CO2 per page load
Images 605.6 KiB 41%
JavaScript 422.0 KiB 29%
Fonts 144.9 KiB 10%
CSS 134.9 KiB 9%
Other 100.7 KiB 7%
HTML 60.2 KiB 4%
Other 8.8 KiB 1%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://blog.google/static/blogv2/images/newslette... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 606 KB
0 oversized -0 KB
18 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

B
JS Execution Cost
859ms total JS execution
REVIEW
859ms total JS execution
Warning::
https://blog.google/: 415ms CPU time
Info::
Unattributable: 144ms CPU time
Info::
https://blog.google/static/keyword/js/all/index.js...: 126ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 103ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 72ms CPU time
Warning::
Third-party scripts: 859ms (100% of total)

Main Thread Breakdown

Script Evaluation 31% Style & Layout 28% Other 27% Rendering 6% Script Parsing & Compilation 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://blog.google/415ms10ms1ms3rd
Unattributable144ms3ms0ms3rd
https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638126ms67ms5ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V103ms91ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64f1h272ms59ms12ms3rd
B
JS Bundles
16 scripts, 139 KB unused
REVIEW
16 scripts, 139 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 62 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 55 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://blog.google/static/keyword/js/all/index.js...: 22 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 139 KB
139 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64f1h2144 KB62 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V135 KB55 KB (41%)✓3rd
https://blog.google/static/keyword/js/all/index.js?version=pr20260415-163849 KB22 KB (45%)✓3rd
https://blog.google/static/keyword/js/5842.js?v=35a95a67e7653fb2e4526 KB—✓3rd
https://blog.google/static/keyword/js/57.js?v=5cb18128de02cfc757315 KB—✓3rd
https://blog.google/static/keyword/js/6195.js?v=240bbdf1583bc2ebecd18 KB—✓3rd
https://blog.google/static/keyword/js/1750.js?v=77e4aa9b926cbbedc65a10 KB—✓3rd
https://blog.google/static/keyword/js/6.js?v=ba27b6f73cac7acd424e16 KB—✓3rd
https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-16382 KB—✓3rd
https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b9 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

B
HTTP Caching
private, max-age=0
REVIEW
private, max-age=0
Info::
Cache-Control header is set
Got: private, max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
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 (145 KB)
PASS
5 fonts (145 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

145 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 500 ms 1.0 s FCP 1.2 s LCP 1.4 shttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 35.3 KiB — 15 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjwUvbQoi-Entw.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjwUvbQoi-Entw.woff2 — 20.9 KiB — 18 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvbQoi-Entw.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvbQoi-Entw.woff2 — 8.8 KiB — 14 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiYUvbQoi-Entw.woff24UasrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiYUvbQoi-Entw.woff2 — 17.0 KiB — 11 ms — font-display: swaphttps://fonts.gstatic.com/s/notocoloremoji/v39/Yq6P-KqIXTD0t4D9z1ESnKM3-HpFabts6diysYTngZPnMC1MfLd4gw.2.woff2Yq6P-KqIXTD0t4D9z1ESnKM... https://fonts.gstatic.com/s/notocoloremoji/v39/Yq6P-KqIXTD0t4D9z1ESnKM3-HpFabts6diysYTngZPnMC1MfLd4gw.2.woff2 — 62.8 KiB — 8 ms — font-display: swap
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 15 ms
Start 610 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 21 KB
Load time 18 ms
Start 611 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 9 KB
Load time 14 ms
Start 611 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 17 KB
Load time 11 ms
Start 611 ms
Risk FOUT — text flashes from fallback to web font
Yq6P-KqIXTD0t4D9z1ESnKM... woff2 swap
Size 63 KB
Load time 8 ms
Start 928 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall
58 requests over 1291ms
INFO
0 ms 500 ms 1.0 s FCP 1.2 s LCP 1.4 shttps://googleblog.com// https://googleblog.com/ — 302 — 311 B — 43 ms — h2https://www.blog.google/www.blog.google/ https://www.blog.google/ — 301 — 139 B — 70 ms — h2https://blog.google/blog.google/ https://blog.google/ — 200 — 60.2 KiB — 124 ms — h2https://fonts.googleapis.com/css2?family=Noto+Color+Emoji&display=swapfonts.googleapis.com/css2?family=No... https://fonts.googleapis.com/css2?family=Noto+Color+Emoji&display=swap — 200 — 2.5 KiB — 85 ms — h2https://blog.google/static/keyword/css/blog/index.min.css?version=pr20260415-1638blog.google/static/keyword/css/blog... https://blog.google/static/keyword/css/blog/index.min.css?version=pr20260415-1638 — 200 — 127.6 KiB — 60 ms — h2https://fonts.googleapis.com/css?family=Google+Sans:400,500,600,700|Product+Sans:400&display=swap&lang=enfonts.googleapis.com/css?family=Goo... https://fonts.googleapis.com/css?family=Google+Sans:400,500,600,700|Product+Sans:400&display=swap&lang=en — 200 — 2.6 KiB — 109 ms — h2https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.csswww.gstatic.com/glue/cookienotifica... https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.css — 200 — 2.2 KiB — 50 ms — h2https://blog.google/static/blogv2/images/icons.svg?version=pr20260415-1638blog.google/static/blogv2/images/ic... https://blog.google/static/blogv2/images/icons.svg?version=pr20260415-1638 — 200 — 49.2 KiB — 33 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/Blog_post_header.width-1600.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/Blog_post_header.width-1600.format-webp.webp — 200 — 115.7 KiB — 42 ms — h2https://blog.google/static/blogv2/images/newsletter_toast.svg?version=pr20260415-1638blog.google/static/blogv2/images/ne... https://blog.google/static/blogv2/images/newsletter_toast.svg?version=pr20260415-1638 — 200 — 355 B — 49 ms — h2data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ… — 200 — 0 B — 0 ms — datahttps://storage.googleapis.com/gweb-uniblog-publish-prod/images/AI_Mode_in_Chrome_-_Blog_header.width-600.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/AI_Mode_in_Chrome_-_Blog_header.width-600.format-webp.webp — 200 — 12.1 KiB — 31 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/D4G_Top5_Keyword_0415.width-600.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/D4G_Top5_Keyword_0415.width-600.format-webp.webp — 200 — 20.7 KiB — 18 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/GeminiAdsreport2026_asset.width-600.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/GeminiAdsreport2026_asset.width-600.format-webp.webp — 200 — 6.0 KiB — 27 ms — h2https://i.ytimg.com/vi_webp/4wxXkihLx8I/maxresdefault.webpi.ytimg.com/vi_webp/4wxXkihLx8I/max... https://i.ytimg.com/vi_webp/4wxXkihLx8I/maxresdefault.webp — 200 — 41.3 KiB — 54 ms — h2https://i.ytimg.com/vi_webp/bF3RqqV4xzI/maxresdefault.webpi.ytimg.com/vi_webp/bF3RqqV4xzI/max... https://i.ytimg.com/vi_webp/bF3RqqV4xzI/maxresdefault.webp — 200 — 26.8 KiB — 48 ms — h2https://i.ytimg.com/vi_webp/NAmkzqCTCO8/maxresdefault.webpi.ytimg.com/vi_webp/NAmkzqCTCO8/max... https://i.ytimg.com/vi_webp/NAmkzqCTCO8/maxresdefault.webp — 200 — 143.0 KiB — 57 ms — h2https://i.ytimg.com/vi_webp/gYfCm3zYajg/maxresdefault.webpi.ytimg.com/vi_webp/gYfCm3zYajg/max... https://i.ytimg.com/vi_webp/gYfCm3zYajg/maxresdefault.webp — 200 — 140.6 KiB — 58 ms — h2https://i.ytimg.com/vi_webp/lwOP_7pSFio/maxresdefault.webpi.ytimg.com/vi_webp/lwOP_7pSFio/max... https://i.ytimg.com/vi_webp/lwOP_7pSFio/maxresdefault.webp — 200 — 36.5 KiB — 52 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/AI-Google_2.width-100.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/AI-Google_2.width-100.format-webp.webp — 200 — 970 B — 23 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/SundarPichai_2x.max-122x92.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/SundarPichai_2x.max-122x92.format-webp.webp — 200 — 1.9 KiB — 19 ms — h2https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-1638blog.google/static/blogv2/js/csp/gt... https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-1638 — 200 — 2.1 KiB — 42 ms — h2https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638blog.google/static/keyword/js/all/i... https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638 — 200 — 48.7 KiB — 43 ms — h2https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.jswww.gstatic.com/glue/cookienotifica... https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.js — 200 — 27.3 KiB — 42 ms — h2https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2fonts.gstatic.com/s/googlesans/v67/... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjIUvbQoi-E.woff2 — 200 — 35.3 KiB — 15 ms — h3https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjwUvbQoi-Entw.woff2fonts.gstatic.com/s/googlesans/v67/... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjwUvbQoi-Entw.woff2 — 200 — 20.9 KiB — 18 ms — h3https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvbQoi-Entw.woff2fonts.gstatic.com/s/googlesans/v67/... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPjEUvbQoi-Entw.woff2 — 200 — 8.8 KiB — 14 ms — h3https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiYUvbQoi-Entw.woff2fonts.gstatic.com/s/googlesans/v67/... https://fonts.gstatic.com/s/googlesans/v67/4UasrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RPiYUvbQoi-Entw.woff2 — 200 — 17.0 KiB — 11 ms — h3https://blog.google/static/blogv2/images/newsletter-homepage-woman-couch.svg?version=pr20260415-1638blog.google/static/blogv2/images/ne... https://blog.google/static/blogv2/images/newsletter-homepage-woman-couch.svg?version=pr20260415-1638 — 200 — 9.9 KiB — 27 ms — h2https://blog.google/static/blogv2/images/newsletter-homepage-chat-box.svg?version=pr20260415-1638blog.google/static/blogv2/images/ne... https://blog.google/static/blogv2/images/newsletter-homepage-chat-box.svg?version=pr20260415-1638 — 200 — 489 B — 29 ms — h2
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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 859ms · 388KB · $11/mo
blog.google
Other
Costly
Execution 415ms
Transfer 60 KB
Monthly Cost $6/mo
Unattributable
Other
Optional
Execution 144ms
Transfer 0 KB
Monthly Cost $2/mo
blog.google
Other
Optional
Execution 126ms
Transfer 49 KB
Unused 45%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 103ms
Transfer 135 KB
Unused 41%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 72ms
Transfer 144 KB
Unused 43%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • blog.google adds 415ms and costs ~$6/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

blog.google takes 415ms 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

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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