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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
73
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.

2.41 s

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

3.89 s

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

478 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.

2.78 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.

8.64 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
8 PASS 4 REVIEW 3 FIX
D
Third-Party Impact
Action
69% third-party, 0 ms blocking
FIX
69% third-party, 0 ms blocking
Warning::
Third-party code accounts for 69% of page weight (937.1 KiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
31%
69%
First-party Third-party
D
JS Execution Cost
Action
3048ms total JS execution
FIX
3048ms total JS execution
Warning::
https://blog.google/: 1001ms CPU time
Warning::
https://blog.google/static/keyword/js/all/index.js...: 737ms CPU time
Warning::
Unattributable: 445ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 376ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 292ms CPU time
Info::
Third-party scripts: 1113ms (37% of total)

Main Thread Breakdown

Script Evaluation 33% Other 25% Style & Layout 24% Rendering 6% Script Parsing & Compilation 6% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://blog.google/1001ms36ms7ms1st
https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638737ms246ms22ms1st
Unattributable445ms11ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V376ms310ms62ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64h1292ms234ms56ms3rd
https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b107ms41ms4ms1st
https://blog.google/static/keyword/js/6.js?v=ba27b6f73cac7acd424e91ms80ms8ms1st
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
Page Weight Budget
1.3 MB transferred, 49 requests
REVIEW
1.3 MB transferred, 49 requests
Info::
Page weighs 3.2 MB (1.3 MB transferred)
Info::
49 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
49 requests
0.28 g CO2 per page load
Images 488.1 KiB 36%
JavaScript 422.5 KiB 31%
Fonts 144.9 KiB 11%
CSS 135.1 KiB 10%
Other 100.2 KiB 7%
HTML 60.1 KiB 4%
Other 10.8 KiB 1%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 488 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
B
JS Bundles
16 scripts, 140 KB unused
REVIEW
16 scripts, 140 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: 140 KB
140 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64h1144 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%)✓1st
https://blog.google/static/keyword/js/5842.js?v=35a95a67e7653fb2e4526 KB—✓1st
https://blog.google/static/keyword/js/57.js?v=5cb18128de02cfc757315 KB—✓1st
https://blog.google/static/keyword/js/6195.js?v=240bbdf1583bc2ebecd18 KB—✓1st
https://blog.google/static/keyword/js/1750.js?v=77e4aa9b926cbbedc65a10 KB—✓1st
https://blog.google/static/keyword/js/6.js?v=ba27b6f73cac7acd424e16 KB—✓1st
https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-16382 KB—✓1st
https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b9 KB—✓1st

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
Page Weight Inventory
Action
49 resources · 1.3 MB · 140 KB savings available
REVIEW
49 resources · 1.3 MB · 140 KB savings available
Warning::
Page weight 338 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~140 KB of savings available
Warning::
27 third-party resources (69% of weight)
49 resources · 1.3 MiB · 27 third-party 337.6 KiB over 1MB target
Image 43% · 588.3 KiB
JavaScript 31% · 422.5 KiB
Font 11% · 144.9 KiB
CSS 10% · 135.1 KiB
Document 4% · 60.1 KiB
Other 1% · 10.8 KiB

~139.6 KiB of savings available

Remove unused JavaScript: 139.6 KiB
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 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.4 s LCP 3.9 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 — 7 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 — 17 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 — 11 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 — 15 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 — 9 ms — font-display: swap
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 7 ms
Start 595 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 21 KB
Load time 17 ms
Start 596 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 9 KB
Load time 11 ms
Start 596 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 17 KB
Load time 15 ms
Start 597 ms
Risk FOUT — text flashes from fallback to web font
Yq6P-KqIXTD0t4D9z1ESnKM... woff2 swap
Size 63 KB
Load time 9 ms
Start 705 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
—
prefetch
—

2 resource hints configured

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
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
49 requests over 1644ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.4 s LCP 3.9 shttps://blog.google// https://blog.google/ — 200 — 60.1 KiB — 345 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 — 35 ms — h2https://blog.google/static/keyword/css/blog/index.min.css?version=pr20260415-1638/static/keyword/css/blog/index.min.... https://blog.google/static/keyword/css/blog/index.min.css?version=pr20260415-1638 — 200 — 127.6 KiB — 28 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 — 2.7 KiB — 36 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 — 29 ms — h2https://blog.google/static/blogv2/images/icons.svg?version=pr20260415-1638/static/blogv2/images/icons.svg?ver... https://blog.google/static/blogv2/images/icons.svg?version=pr20260415-1638 — 200 — 49.2 KiB — 37 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/Blog_post_header.width-800.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/Blog_post_header.width-800.format-webp.webp — 200 — 47.0 KiB — 40 ms — h2https://blog.google/static/blogv2/images/newsletter_toast.svg?version=pr20260415-1638/static/blogv2/images/newsletter_to... https://blog.google/static/blogv2/images/newsletter_toast.svg?version=pr20260415-1638 — 200 — 356 B — 25 ms — h2https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-1638/static/blogv2/js/csp/gtm.js?versio... https://blog.google/static/blogv2/js/csp/gtm.js?version=pr20260415-1638 — 200 — 2.2 KiB — 26 ms — h2https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638/static/keyword/js/all/index.js?ver... https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638 — 200 — 48.7 KiB — 30 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 — 26 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-300.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/AI_Mode_in_Chrome_-_Blog_header.width-300.format-webp.webp — 200 — 4.2 KiB — 995 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/D4G_Top5_Keyword_0415.width-300.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/D4G_Top5_Keyword_0415.width-300.format-webp.webp — 200 — 7.8 KiB — 1.0 s — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini-3.1-pro_deep-research-and-.width-300.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini-3.1-pro_deep-research-and-.width-300.format-webp.webp — 200 — 6.3 KiB — 1.2 s — 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 — 20 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 — 27.1 KiB — 14 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 — 142.7 KiB — 53 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 — 30 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TRV24Vwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V — 200 — 135.3 KiB — 39 ms — h2https://blog.google/static/keyword/js/57.js?v=5cb18128de02cfc75731/static/keyword/js/57.js?v=5cb18128... https://blog.google/static/keyword/js/57.js?v=5cb18128de02cfc75731 — 200 — 4.8 KiB — 20 ms — h2https://blog.google/static/keyword/js/6195.js?v=240bbdf1583bc2ebecd1/static/keyword/js/6195.js?v=240bbd... https://blog.google/static/keyword/js/6195.js?v=240bbdf1583bc2ebecd1 — 200 — 7.6 KiB — 16 ms — h2https://blog.google/static/keyword/js/1750.js?v=77e4aa9b926cbbedc65a/static/keyword/js/1750.js?v=77e4aa... https://blog.google/static/keyword/js/1750.js?v=77e4aa9b926cbbedc65a — 200 — 10.4 KiB — 24 ms — h2https://blog.google/static/keyword/js/6.js?v=ba27b6f73cac7acd424e/static/keyword/js/6.js?v=ba27b6f73... https://blog.google/static/keyword/js/6.js?v=ba27b6f73cac7acd424e — 200 — 16.1 KiB — 31 ms — h2https://blog.google/static/keyword/js/5842.js?v=35a95a67e7653fb2e452/static/keyword/js/5842.js?v=35a95a... https://blog.google/static/keyword/js/5842.js?v=35a95a67e7653fb2e452 — 200 — 6.3 KiB — 28 ms — h2https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b/static/keyword/js/5032.js?v=134f86... https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b — 200 — 8.5 KiB — 25 ms — h2https://blog.google/static/blogv2/images/icons.svg?version=/static/blogv2/images/icons.svg?ver... https://blog.google/static/blogv2/images/icons.svg?version= — 200 — 49.2 KiB — 14 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 — 7 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 — 17 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 — 11 ms — h3
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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
37% of JavaScript execution is third-party
First-party Third-party 1113ms · 280KB · $15/mo
Unattributable
Other
Costly
Execution 445ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 376ms
Transfer 135 KB
Unused 41%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 292ms
Transfer 144 KB
Unused 43%
Monthly Cost $4/mo

These scripts may cost more than they're worth

  • Unattributable adds 445ms and costs ~$6/month
  • Google Tag Manager adds 376ms and costs ~$5/month
  • Google Tag Manager adds 292ms and costs ~$4/month

Unattributable takes 445ms 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

Google Tag Manager takes 376ms 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

Google Tag Manager takes 292ms 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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