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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
3
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
83
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
92
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.

605 ms

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

2.99 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.

0.004

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

877 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.99 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
8 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
18.9 MB transferred, 63 requests
FIX
18.9 MB transferred, 63 requests
Critical::
Page weighs 23.6 MB (18.9 MB transferred)
Warning::
Images are 15.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 15.4 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
CSS is 201 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 201 KB
Info::
63 HTTP requests
Info::
Estimated 4.0 g CO2 per page load
18.9 MB / 2.4 MB budget
18.9 MB transferred
63 requests
4.0 g CO2 per page load
Images 15.4 MiB 81%
Other 1.8 MiB 10%
JavaScript 1.3 MiB 7%
CSS 200.9 KiB 1%
Fonts 165.5 KiB 1%
HTML 77.4 KiB 0%
Other 7.7 KiB 0%
Other 959 B 0%
Other 801 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (18.7 MiB of 18.9 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
Page Weight Inventory
Action
63 resources · 18.9 MB · 248 KB savings available
FIX
63 resources · 18.9 MB · 248 KB savings available
Warning::
Page weight 17.9 MB over 1MB target
Got: 18.9 MB Expected: ≤ 1 MB
Info::
~248 KB of savings available
Warning::
52 third-party resources (99% of weight)
Info::
7 resources over 200KB
63 resources · 18.9 MiB · 52 third-party 17.9 MiB over 1MB target
Image 81% · 15.4 MiB
Media 10% · 1.8 MiB
JavaScript 7% · 1.3 MiB
CSS 1% · 200.9 KiB
Font 1% · 165.5 KiB
Document 0% · 77.4 KiB
Other 0% · 2.7 KiB

~248.0 KiB of savings available

Remove unused JavaScript: 248.0 KiB
C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://storage.googleapis.com/gweb-research2023-m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://storage.googleapis.com/gweb-research2023-m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://storage.googleapis.com/gweb-research2023-m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 15.4 MB
0 oversized -0 KB
17 legacy format
3 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

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

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
JS Bundles
Action
14 scripts, 248 KB unused
REVIEW
14 scripts, 248 KB unused
Warning::
https://research.google/gr/static/js/googleresearc...: 78 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-163L...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-K8Q...: 61 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/glue/v27_1/material-compon...: 46 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 248 KB
248 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://research.google/gr/static/js/googleresearch.js?id=b23210a21057c86d701509e7dd1b5284117 KB78 KB (67%)✓1st
https://www.googletagmanager.com/gtag/js?id=G-163LFDWS1G&cx=c&gtm=4e64h1144 KB63 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-K8QBZ7Q140 KB61 KB (44%)✓3rd
https://www.gstatic.com/glue/v27_1/material-components-web.min.js69 KB46 KB (67%)✓3rd
https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.js27 KB—✓3rd
https://www.gstatic.com/feedback/js/1qbsrllwsv954/api.js15 KB—✓3rd
https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js11 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.CYE28xQTWxU.2021.O/am=AAAABA/d=1/br=1/rs=AGKMywGc21Bc99sDrhbnjOkQlq7nTfp_WQ/m=root,base193 KB—✓3rd
https://www.youtube.com/s/player/218d9d92/player_embed_es6.vflset/en_US/base.js436 KB—✓3rd
https://www.youtube.com/player_api3 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

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+
JS Execution Cost
494ms total JS execution
PASS
494ms total JS execution
Info::
Unattributable: 205ms CPU time
Info::
https://research.google/: 156ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-K8Q...: 74ms CPU time
Info::
https://research.google/gr/static/js/googleresearc...: 59ms CPU time
Warning::
Third-party scripts: 280ms (57% of total)

Main Thread Breakdown

Other 39% Script Evaluation 29% Style & Layout 17% Script Parsing & Compilation 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
Unattributable205ms3ms0ms3rd
https://research.google/156ms3ms1ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-K8QBZ7Q74ms62ms8ms3rd
https://research.google/gr/static/js/googleresearch.js?id=b23210a21057c86d701509e7dd1b528459ms28ms7ms1st
A+
Font Loading
7 fonts (166 KB)
PASS
7 fonts (166 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

166 KB total

Render-blocking

0

of 7

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 FCP 605 ms LCP 3.0 shttps://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff25aUu9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff2 — 21.6 KiB — 32 ms — font-display: swaphttps://fonts.gstatic.com/s/productsans/v20/pxiDypQkot1TnFhsFMOfGShVF9eOYktMqg.woff2pxiDypQkot1TnFhsFMOfGSh... https://fonts.gstatic.com/s/productsans/v20/pxiDypQkot1TnFhsFMOfGShVF9eOYktMqg.woff2 — 14.6 KiB — 38 ms — font-display: swaphttps://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 — 68 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff25aUp9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff2 — 22.3 KiB — 69 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesansdisplay/v23/ea8FacM9Wef3EJPWRrHjgE4B6CnlZxHVDv79oT3ZQZQ.woff2ea8FacM9Wef3EJPWRrHjgE4... https://fonts.gstatic.com/s/googlesansdisplay/v23/ea8FacM9Wef3EJPWRrHjgE4B6CnlZxHVDv79oT3ZQZQ.woff2 — 15.1 KiB — 64 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmhjtjm4DZw.woff25aUp9-KzpRiLCAt4Unrc-xI... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmhjtjm4DZw.woff2 — 22.8 KiB — 70 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 63 ms — font-display: swap
5aUu9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 22 KB
Load time 32 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
pxiDypQkot1TnFhsFMOfGSh... woff2 swap
Size 15 KB
Load time 38 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
4UasrENHsxJlGDuGo1OIlJf... woff2 swap
Size 35 KB
Load time 68 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
5aUp9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 22 KB
Load time 69 ms
Start 419 ms
Risk FOUT — text flashes from fallback to web font
ea8FacM9Wef3EJPWRrHjgE4... woff2 swap
Size 15 KB
Load time 64 ms
Start 419 ms
Risk FOUT — text flashes from fallback to web font
5aUp9-KzpRiLCAt4Unrc-xI... woff2 swap
Size 23 KB
Load time 70 ms
Start 420 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 63 ms
Start 695 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

A
HTTP Caching
max-age=1800 (30 minutes)
PASS
max-age=1800 (30 minutes)
Info::
Cache-Control header is set
Got: max-age=1800
Info::
Effective TTL: 30 minutes (max-age=1800)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=1800

DirectiveValueMeaning
max-age1800Cache for 30 minutes
Effective TTL: 1800 seconds
Network Waterfall
63 requests over 3797ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 605 ms LCP 3.0 shttps://research.google// https://research.google/ — 200 — 21.2 KiB — 177 ms — h2https://fonts.googleapis.com/css2?family=Product+Sans&family=Google+Sans+Display:ital@0;1&family=Google+Sans:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&family=Google+Sans+Text:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&display=swapfonts.googleapis.com/css2?family=Pr... https://fonts.googleapis.com/css2?family=Product+Sans&family=Google+Sans+Display:ital@0;1&family=Google+Sans:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&family=Google+Sans+Text:ital,wght@0,400;0,500;0,700;1,400;1,500;1,700&display=swap — 200 — 4.7 KiB — 84 ms — h2https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;700&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;700&display=swap — 200 — 1.1 KiB — 71 ms — h2https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.csswww.gstatic.com/glue/cookienotifica... https://www.gstatic.com/glue/cookienotificationbar/cookienotificationbar.min.css — 200 — 1.9 KiB — 92 ms — h2https://www.gstatic.com/glue/v27_1/glue-material.min.csswww.gstatic.com/glue/v27_1/glue-mat... https://www.gstatic.com/glue/v27_1/glue-material.min.css — 200 — 18.6 KiB — 80 ms — h2https://research.google/gr/static/css/googleresearch.css?id=5cbfeb4af4cff622307d8ce05442b2f5/gr/static/css/googleresearch.css?i... https://research.google/gr/static/css/googleresearch.css?id=5cbfeb4af4cff622307d8ce05442b2f5 — 200 — 72.2 KiB — 59 ms — h2https://storage.googleapis.com/gweb-research2023-media/original_images/Research_Homepage_Artboard_4a_616x360.pngstorage.googleapis.com/gweb-researc... https://storage.googleapis.com/gweb-research2023-media/original_images/Research_Homepage_Artboard_4a_616x360.png — 200 — 3.7 MiB — 978 ms — h2https://storage.googleapis.com/gweb-research2023-media/original_images/USS0291-Google_Research_Anthem_Film_Thumbnail4_1.jpgstorage.googleapis.com/gweb-researc... https://storage.googleapis.com/gweb-research2023-media/original_images/USS0291-Google_Research_Anthem_Film_Thumbnail4_1.jpg — 200 — 143.2 KiB — 841 ms — h2https://storage.googleapis.com/gweb-research2023-media/images/HP_EarthAI.width-800.pngstorage.googleapis.com/gweb-researc... https://storage.googleapis.com/gweb-research2023-media/images/HP_EarthAI.width-800.png — 200 — 221.0 KiB — 837 ms — h2https://storage.googleapis.com/gweb-research2023-media/images/WIldfires_homepage-project-collage.width-800.pngstorage.googleapis.com/gweb-researc... https://storage.googleapis.com/gweb-research2023-media/images/WIldfires_homepage-project-collage.width-800.png — 200 — 385.7 KiB — 957 ms — h2https://research.google/gr/static/assets/icons/glue-icons.svg/gr/static/assets/icons/glue-icons.... https://research.google/gr/static/assets/icons/glue-icons.svg — 200 — 4.8 KiB — 24 ms — h3https://research.google/gr/static/assets/icons/twitter-x.svg/gr/static/assets/icons/twitter-x.s... https://research.google/gr/static/assets/icons/twitter-x.svg — 200 — 460 B — 28 ms — h3https://research.google/gr/static/assets/icons/github.svg/gr/static/assets/icons/github.svg https://research.google/gr/static/assets/icons/github.svg — 200 — 618 B — 29 ms — h3https://www.gstatic.com/glue/v27_1/material-components-web.min.jswww.gstatic.com/glue/v27_1/material... https://www.gstatic.com/glue/v27_1/material-components-web.min.js — 200 — 69.0 KiB — 60 ms — h2https://www.youtube.com/player_apiwww.youtube.com/player_api https://www.youtube.com/player_api — 200 — 3.2 KiB — 89 ms — h2https://research.google/gr/static/js/googleresearch.js?id=b23210a21057c86d701509e7dd1b5284/gr/static/js/googleresearch.js?id=... https://research.google/gr/static/js/googleresearch.js?id=b23210a21057c86d701509e7dd1b5284 — 200 — 116.8 KiB — 70 ms — h3https://support.google.com/inapp/api.jssupport.google.com/inapp/api.js https://support.google.com/inapp/api.js — 302 — 1014 B — 111 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 — 68 ms — h2https://research.google/gr/static/assets/icons/caret.svg/gr/static/assets/icons/caret.svg https://research.google/gr/static/assets/icons/caret.svg — 200 — 221 B — 34 ms — h3https://research.google/gr/static/assets/icons/super-g.svg/gr/static/assets/icons/super-g.svg https://research.google/gr/static/assets/icons/super-g.svg — 200 — 500 B — 35 ms — h3https://research.google/gr/static/assets/icons/google-cloud.svg/gr/static/assets/icons/google-clou... https://research.google/gr/static/assets/icons/google-cloud.svg — 200 — 11.4 KiB — 40 ms — h3https://research.google/gr/static/assets/icons/google-deepmind.svg/gr/static/assets/icons/google-deep... https://research.google/gr/static/assets/icons/google-deepmind.svg — 200 — 8.2 KiB — 44 ms — h3https://research.google/gr/static/assets/icons/google-labs.svg/gr/static/assets/icons/google-labs... https://research.google/gr/static/assets/icons/google-labs.svg — 200 — 990 B — 44 ms — h3https://storage.googleapis.com/gweb-research2023-media/images/yossi-portrait-high-res_1.width-800.jpgstorage.googleapis.com/gweb-researc... https://storage.googleapis.com/gweb-research2023-media/images/yossi-portrait-high-res_1.width-800.jpg — 200 — 80.2 KiB — 625 ms — h2https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff2fonts.gstatic.com/s/googlesanstext/... https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff2 — 200 — 21.6 KiB — 32 ms — h3https://fonts.gstatic.com/s/productsans/v20/pxiDypQkot1TnFhsFMOfGShVF9eOYktMqg.woff2fonts.gstatic.com/s/productsans/v20... https://fonts.gstatic.com/s/productsans/v20/pxiDypQkot1TnFhsFMOfGShVF9eOYktMqg.woff2 — 200 — 14.6 KiB — 38 ms — h3https://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 — 68 ms — h3https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff2fonts.gstatic.com/s/googlesanstext/... https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff2 — 200 — 22.3 KiB — 69 ms — h3https://fonts.gstatic.com/s/googlesansdisplay/v23/ea8FacM9Wef3EJPWRrHjgE4B6CnlZxHVDv79oT3ZQZQ.woff2fonts.gstatic.com/s/googlesansdispl... 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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
57% of JavaScript execution is third-party
First-party Third-party 280ms · 140KB · €3/mo
Unattributable
Other
Costly
Execution 205ms
Transfer 0 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 74ms
Transfer 140 KB
Unused 44%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 205ms and costs ~€2/month

57% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 205ms 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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