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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
91
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.

609 ms

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

1.89 s

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

12 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.

1.98 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 4 REVIEW 3 FIX
D
Third-Party Impact
Action
72% third-party, 0 ms blocking
FIX
72% third-party, 0 ms blocking
Warning::
Third-party code accounts for 72% of page weight (1.1 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
28%
72%
First-party Third-party
D
Page Weight Inventory
Action
56 resources · 1.5 MB · 140 KB savings available
FIX
56 resources · 1.5 MB · 140 KB savings available
Warning::
Page weight 503 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~140 KB of savings available
Warning::
34 third-party resources (72% of weight)
56 resources · 1.5 MiB · 34 third-party 503.0 KiB over 1MB target
Image 49% · 754.1 KiB
JavaScript 28% · 422.0 KiB
Font 9% · 144.9 KiB
CSS 9% · 135.0 KiB
Document 4% · 60.3 KiB
Other 1% · 10.8 KiB

~139.8 KiB of savings available

Remove unused JavaScript: 139.8 KiB
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
1.5 MB transferred, 56 requests
REVIEW
1.5 MB transferred, 56 requests
Info::
Page weighs 3.4 MB (1.5 MB transferred)
Info::
56 HTTP requests
Info::
Estimated 0.31 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
56 requests
0.31 g CO2 per page load
Images 653.8 KiB 43%
JavaScript 422.0 KiB 28%
Fonts 144.9 KiB 9%
CSS 135.0 KiB 9%
Other 100.2 KiB 7%
HTML 60.3 KiB 4%
Other 10.8 KiB 1%
0 2.4 MB 4.9 MB
Approaching limit
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 654 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
775ms total JS execution
REVIEW
775ms total JS execution
Warning::
https://blog.google/: 290ms CPU time
Info::
https://blog.google/static/keyword/js/all/index.js...: 218ms CPU time
Info::
Unattributable: 100ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 96ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 71ms CPU time
Info::
Third-party scripts: 267ms (35% of total)

Main Thread Breakdown

Script Evaluation 33% Other 28% Style & Layout 23% Rendering 6% Script Parsing & Compilation 6% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://blog.google/290ms9ms2ms1st
https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638218ms80ms5ms1st
Unattributable100ms4ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V96ms78ms17ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64k0h271ms57ms14ms3rd
B
JS Bundles
16 scripts, 140 KB unused
REVIEW
16 scripts, 140 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 56 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=4e64k0h2144 KB63 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V135 KB56 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

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 1.5 s FCP 609 ms LCP 1.9 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 — 12 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 — 15 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 — 16 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 — 15 ms — font-display: swap
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 12 ms
Start 678 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 21 KB
Load time 15 ms
Start 678 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 9 KB
Load time 14 ms
Start 678 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 17 KB
Load time 16 ms
Start 679 ms
Risk FOUT — text flashes from fallback to web font
Yq6P-KqIXTD0t4D9z1ESnKM... woff2 swap
Size 63 KB
Load time 15 ms
Start 826 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
56 requests over 2404ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 609 ms LCP 1.9 shttps://blog.google// https://blog.google/ — 200 — 60.3 KiB — 417 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 — 23 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 — 37 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 — 25 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 — 20 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 — 30 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 — 115.4 KiB — 675 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 — 355 B — 20 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 — 21 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 — 24 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 — 22 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 — 12.4 KiB — 18 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 — 20 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini-3.1-pro_deep-research-and-.width-600.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini-3.1-pro_deep-research-and-.width-600.format-webp.webp — 200 — 15.6 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 — 41.6 KiB — 38 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 — 42 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 — 54 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 — 80 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 — 79 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 — 953 B — 1.2 s — 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 — 27 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 — 135.0 KiB — 65 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 — 12 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 — 18 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 — 14 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 — 19 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 — 22 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 — 23 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 — 12 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 609 ms LCP 1.9 shttps://blog.google// https://blog.google/ — 200 — 60.3 KiB — 417 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 — 23 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 — 37 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 — 25 ms — h2https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.csswww.gstatic.com/glue/cookienotifica... 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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
35% of JavaScript execution is third-party
First-party Third-party 267ms · 279KB · $4/mo
Unattributable
Other
Optional
Execution 100ms
Transfer 0 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 96ms
Transfer 135 KB
Unused 41%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 71ms
Transfer 144 KB
Unused 43%
Monthly Cost $1/mo

How third-party costs are calculated

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