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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
5
PASS
8
INFO
2

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

Mobile Desktop
72
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.

2.81 s

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

4.74 s

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

291 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.

3.09 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.

9.79 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 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 (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3237ms total JS execution
FIX
3237ms total JS execution
Warning::
https://blog.google/: 1532ms CPU time
Warning::
Unattributable: 454ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TRV...: 388ms CPU time
Warning::
https://blog.google/static/keyword/js/all/index.js...: 347ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TMN2...: 259ms CPU time
Warning::
Third-party scripts: 3237ms (100% of total)

Main Thread Breakdown

Script Evaluation 32% Style & Layout 27% Other 25% Parse HTML & CSS 5% Rendering 5% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://blog.google/1532ms32ms6ms3rd
Unattributable454ms12ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TRV24V388ms334ms51ms3rd
https://blog.google/static/keyword/js/all/index.js?version=pr20260415-1638347ms232ms17ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TMN2946Z0E&cx=c&gtm=4e64f0259ms215ms42ms3rd
https://blog.google/static/keyword/js/5032.js?v=134f8604c6f5ca868e3b122ms41ms3ms3rd
https://blog.google/static/keyword/js/6195.js?v=240bbdf1583bc2ebecd182ms76ms2ms3rd
https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.js52ms38ms14ms3rd
B
Page Weight Budget
1.3 MB transferred, 52 requests
REVIEW
1.3 MB transferred, 52 requests
Info::
Page weighs 3.2 MB (1.3 MB transferred)
Info::
52 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
52 requests
0.28 g CO2 per page load
Images 475.4 KiB 35%
JavaScript 422.0 KiB 31%
Fonts 144.9 KiB 11%
CSS 135.1 KiB 10%
Other 100.8 KiB 7%
HTML 60.0 KiB 4%
Other 8.8 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 475 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
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=4e64f0144 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

C
Page Weight Inventory
Action
52 resources · 1.3 MB · 139 KB savings available
REVIEW
52 resources · 1.3 MB · 139 KB savings available
Warning::
Page weight 323 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~139 KB of savings available
Warning::
50 third-party resources (100% of weight)
52 resources · 1.3 MiB · 50 third-party 322.9 KiB over 1MB target
Image 43% · 575.6 KiB
JavaScript 31% · 422.0 KiB
Font 11% · 144.9 KiB
CSS 10% · 135.1 KiB
Document 4% · 60.5 KiB
Other 1% · 8.8 KiB

~139.4 KiB of savings available

Remove unused JavaScript: 139.4 KiB
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 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.8 s LCP 4.7 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 — 19 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 — 26 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 — 38 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 — 28 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 19 ms
Start 871 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 21 KB
Load time 26 ms
Start 871 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 9 KB
Load time 38 ms
Start 875 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 17 KB
Load time 28 ms
Start 876 ms
Risk FOUT — text flashes from fallback to web font
Yq6P-KqIXTD0t4D9z1ESnKM... woff2 swap
Size 63 KB
Load time 8 ms
Start 1.1 s
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
52 requests over 1438ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.8 s LCP 4.7 shttps://googleblog.com// https://googleblog.com/ — 302 — 289 B — 239 ms — h2https://googleblog.com/?m=1/?m=1 https://googleblog.com/?m=1 — 302 — 97 B — 54 ms — h2https://www.blog.google/www.blog.google/ https://www.blog.google/ — 301 — 139 B — 72 ms — h2https://blog.google/blog.google/ https://blog.google/ — 200 — 60.0 KiB — 125 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 — 2.6 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 — 51 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 — 92 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 — 66 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 — 49 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 — 55 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 — 354 B — 25 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 — 2.2 KiB — 31 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 — 37 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 — 36 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 — 98 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 — 86 ms — h2https://storage.googleapis.com/gweb-uniblog-publish-prod/images/GeminiAdsreport2026_asset.width-300.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/GeminiAdsreport2026_asset.width-300.format-webp.webp — 200 — 1.8 KiB — 90 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 — 41.6 KiB — 71 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 — 68 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 — 134 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 — 90 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 — 36.4 KiB — 33 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 — 736 B — 26 ms — h3https://storage.googleapis.com/gweb-uniblog-publish-prod/images/SundarPichai_2x.max-208x156.format-webp.webpstorage.googleapis.com/gweb-uniblog... https://storage.googleapis.com/gweb-uniblog-publish-prod/images/SundarPichai_2x.max-208x156.format-webp.webp — 200 — 3.5 KiB — 98 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 — 39 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 — 490 B — 41 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 — 19 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 — 26 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 — 38 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.8 s LCP 4.7 shttps://googleblog.com// https://googleblog.com/ — 302 — 289 B — 239 ms — h2https://googleblog.com/?m=1/?m=1 https://googleblog.com/?m=1 — 302 — 97 B — 54 ms — h2https://www.blog.google/www.blog.google/ https://www.blog.google/ — 301 — 139 B — 72 ms — h2https://blog.google/blog.google/ https://blog.google/ — 200 — 60.0 KiB — 125 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 — 2.6 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 — 51 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... 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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 3237ms · 431KB · $43/mo
blog.google
Other
Costly
Execution 1532ms
Transfer 60 KB
Monthly Cost $20/mo
Unattributable
Other
Costly
Execution 454ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 388ms
Transfer 135 KB
Unused 41%
Monthly Cost $5/mo
blog.google
Other
Costly
Execution 347ms
Transfer 49 KB
Unused 45%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 259ms
Transfer 144 KB
Unused 43%
Monthly Cost $3/mo
blog.google
Other
Optional
Execution 122ms
Transfer 9 KB
Monthly Cost $2/mo
blog.google
Other
Optional
Execution 82ms
Transfer 8 KB
Monthly Cost $1/mo
www.gstatic.com
Other
Optional
Execution 52ms
Transfer 27 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • blog.google adds 1532ms and costs ~$20/month
  • Unattributable adds 454ms and costs ~$6/month
  • Google Tag Manager adds 388ms and costs ~$5/month
  • blog.google adds 347ms and costs ~$5/month
  • Google Tag Manager adds 259ms and costs ~$3/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 1532ms 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

Unattributable takes 454ms 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 388ms 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

blog.google takes 347ms 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 259ms 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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