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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
57
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.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

8.20 s

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

10.30 s

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

78 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.022

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

8.20 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.

12.13 s

Page Load Progression

560 ms
1.1 s
1.7 s
2.2 s
2.8 s
3.4 s
3.9 s
4.5 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
22.4 MB transferred, 42 requests
FIX
22.4 MB transferred, 42 requests
Critical::
Page weighs 19.8 MB (22.4 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
42 HTTP requests
Info::
Estimated 4.7 g CO2 per page load
22.4 MB / 2.4 MB budget
22.4 MB transferred
42 requests
4.7 g CO2 per page load
Other 21.0 MiB 94%
JavaScript 1.1 MiB 5%
Fonts 184.3 KiB 1%
CSS 47.6 KiB 0%
HTML 29.8 KiB 0%
Images 6.2 KiB 0%
Other 5.7 KiB 0%
Other 764 B 0%
Other 558 B 0%
Other 23 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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 (22.1 MiB of 22.4 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
F
JS Bundles
Action
16 scripts, 660 KB unused
FIX
16 scripts, 660 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://accounts.google.com/gsi/client: 68 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CZHC...: 61 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 660 KB
660 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://accounts.google.com/gsi/client96 KB68 KB (71%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CZHCF49R69155 KB61 KB (39%)✓3rd
https://stumbleupon.com/_next/static/chunks/pages/_app-61b9c26c7e6cbfb3.js21 KB—✓1st
https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_buildManifest.js1 KB—✓1st
https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_ssgManifest.js0 KB—✓1st
https://stumbleupon.com/_next/static/chunks/pages/topic/%5Btopic%5D-c4ba61ade5f288ef.js3 KB—✓1st
https://www.google.com/recaptcha/enterprise.js?render=6LfobFMqAAAAAKTnW9p0QDKrpzZHN_77ZsuQ8Z861 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

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

F
Page Weight Inventory
Action
42 resources · 22.4 MB · 660 KB savings available
FIX
42 resources · 22.4 MB · 660 KB savings available
Warning::
Page weight 21.4 MB over 1MB target
Got: 22.4 MB Expected: ≤ 1 MB
Info::
~660 KB of savings available
Warning::
22 third-party resources (99% of weight)
Info::
3 resources over 200KB
42 resources · 22.4 MiB · 22 third-party 21.4 MiB over 1MB target
Media 94% · 21.0 MiB
JavaScript 5% · 1.1 MiB
Font 1% · 184.3 KiB
CSS 0% · 47.6 KiB
Document 0% · 29.8 KiB
Image 0% · 8.5 KiB
Other 0% · 3.6 KiB

~660.5 KiB of savings available

Remove unused JavaScript: 660.5 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
B
Image Optimization
4 images, 0 KB saveable
REVIEW
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 6 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1997ms total JS execution
REVIEW
1997ms total JS execution
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 766ms CPU time
Warning::
Unattributable: 450ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CZHC...: 287ms CPU time
Info::
https://stumbleupon.com/: 158ms CPU time
Info::
https://accounts.google.com/gsi/client: 138ms CPU time
Warning::
Third-party scripts: 1641ms (82% of total)

Main Thread Breakdown

Script Evaluation 60% Other 22% Script Parsing & Compilation 8% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js766ms654ms74ms3rd
Unattributable450ms13ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CZHCF49R69287ms236ms48ms3rd
https://stumbleupon.com/158ms5ms1ms1st
https://accounts.google.com/gsi/client138ms106ms25ms3rd
https://stumbleupon.com/_next/static/chunks/framework-ecc4130bc7a58a64.js132ms116ms12ms1st
https://stumbleupon.com/_next/static/chunks/main-e48048216a5fdbc9.js66ms53ms11ms1st
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
4 fonts (184 KB)
PASS
4 fonts (184 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

184 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 8.2 s LCP 10.3 shttps://stumbleupon.com/_next/static/media/SharpSansDispNo1-Bold.a6fa5a21.woff2SharpSansDispNo1-Bold.a... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Bold.a6fa5a21.woff2 — 50.1 KiB — 259 ms — font-display: swaphttps://stumbleupon.com/_next/static/media/SharpSansDispNo1-Medium.c5a7fc78.woff2SharpSansDispNo1-Medium... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Medium.c5a7fc78.woff2 — 49.3 KiB — 345 ms — font-display: swaphttps://stumbleupon.com/_next/static/media/SharpSansDispNo1-Semibold.67b590ff.woff2SharpSansDispNo1-Semibo... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Semibold.67b590ff.woff2 — 51.0 KiB — 112 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 85 ms — font-display: swap
SharpSansDispNo1-Bold.a... woff2 swap
Size 50 KB
Load time 259 ms
Start 452 ms
Risk FOUT — text flashes from fallback to web font
SharpSansDispNo1-Medium... woff2 swap
Size 49 KB
Load time 345 ms
Start 452 ms
Risk FOUT — text flashes from fallback to web font
SharpSansDispNo1-Semibo... woff2 swap
Size 51 KB
Load time 112 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 85 ms
Start 1.6 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
41 hints, 0 missing preconnects
PASS
41 hints, 0 missing preconnects
Info::
Page uses 41 resource hint(s)

Current Resource Hints

preconnect
—
preload
+31
41
dns-prefetch
—
prefetch
—

41 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
Network Waterfall
42 requests over 2167ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 8.2 s LCP 10.3 shttps://stumbleupon.com// https://stumbleupon.com/ — 200 — 2.2 KiB — 300 ms — h2https://www.googletagmanager.com/gtag/js?id=G-CZHCF49R69www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-CZHCF49R69 — 200 — 154.6 KiB — 170 ms — h2https://stumbleupon.com/_next/static/css/abcf906f70706906.css/_next/static/css/abcf906f70706906.... https://stumbleupon.com/_next/static/css/abcf906f70706906.css — 200 — 4.0 KiB — 104 ms — h2https://stumbleupon.com/_next/static/css/71970a0172162ed1.css/_next/static/css/71970a0172162ed1.... https://stumbleupon.com/_next/static/css/71970a0172162ed1.css — 200 — 876 B — 102 ms — h2https://stumbleupon.com/images/mix_logo_white.svg/images/mix_logo_white.svg https://stumbleupon.com/images/mix_logo_white.svg — 200 — 1.3 KiB — 103 ms — h2https://stumbleupon.com/_next/static/chunks/webpack-ee7e63bc15b31913.js/_next/static/chunks/webpack-ee7e63... https://stumbleupon.com/_next/static/chunks/webpack-ee7e63bc15b31913.js — 200 — 1.0 KiB — 102 ms — h2https://stumbleupon.com/_next/static/chunks/framework-ecc4130bc7a58a64.js/_next/static/chunks/framework-ecc4... https://stumbleupon.com/_next/static/chunks/framework-ecc4130bc7a58a64.js — 200 — 44.5 KiB — 478 ms — h2https://stumbleupon.com/_next/static/chunks/main-e48048216a5fdbc9.js/_next/static/chunks/main-e48048216... https://stumbleupon.com/_next/static/chunks/main-e48048216a5fdbc9.js — 200 — 36.1 KiB — 293 ms — h2https://stumbleupon.com/_next/static/chunks/pages/_app-61b9c26c7e6cbfb3.js/_next/static/chunks/pages/_app-61b... https://stumbleupon.com/_next/static/chunks/pages/_app-61b9c26c7e6cbfb3.js — 200 — 20.9 KiB — 191 ms — h2https://stumbleupon.com/_next/static/chunks/pages/topic/%5Btopic%5D-c4ba61ade5f288ef.js/_next/static/chunks/pages/topic/%5... https://stumbleupon.com/_next/static/chunks/pages/topic/%5Btopic%5D-c4ba61ade5f288ef.js — 200 — 2.6 KiB — 288 ms — h2https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_buildManifest.js/_next/static/V9bWJWSlg6i9uqZ9inWcs... https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_buildManifest.js — 200 — 679 B — 289 ms — h2https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_ssgManifest.js/_next/static/V9bWJWSlg6i9uqZ9inWcs... https://stumbleupon.com/_next/static/V9bWJWSlg6i9uqZ9inWcs/_ssgManifest.js — 200 — 318 B — 477 ms — h2https://stumbleupon.com/images/logo.png/images/logo.png https://stumbleupon.com/images/logo.png — 200 — 2.2 KiB — 383 ms — h2https://assets.mix.com/static/onboarding/5.8_version_11_1.mp4assets.mix.com/static/onboarding/5.... https://assets.mix.com/static/onboarding/5.8_version_11_1.mp4 — 206 — 21.0 MiB — 96 ms — h2https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Bold.a6fa5a21.woff2/_next/static/media/SharpSansDispNo... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Bold.a6fa5a21.woff2 — 200 — 50.1 KiB — 259 ms — h2https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Medium.c5a7fc78.woff2/_next/static/media/SharpSansDispNo... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Medium.c5a7fc78.woff2 — 200 — 49.3 KiB — 345 ms — h2https://region1.analytics.google.com/g/collect?v=2&tid=G-CZHCF49R69&gtm=45je64h1v868420704za200zd868420704&_p=1776799097595&_gaz=1&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAGA&are=1&cid=172449125.1776799098&frm=0&pscdl=noapi&rcb=19&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~118128923&dp=%2F&sid=1776799097&sct=1&seg=0&dl=https%3A%2F%2Fstumbleupon.com%2F&dt=StumbleUpon&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=561region1.analytics.google.com/g/coll... https://region1.analytics.google.com/g/collect?v=2&tid=G-CZHCF49R69&gtm=45je64h1v868420704za200zd868420704&_p=1776799097595&_gaz=1&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAGA&are=1&cid=172449125.1776799098&frm=0&pscdl=noapi&rcb=19&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~118128923&dp=%2F&sid=1776799097&sct=1&seg=0&dl=https%3A%2F%2Fstumbleupon.com%2F&dt=StumbleUpon&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=561 — 204 — 549 B — 92 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-CZHCF49R69&cid=172449125.1776799098&gtm=45je64h1v868420704za200zd868420704&rcb=19&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115616985~115938466~115938468~117266401~118128923stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-CZHCF49R69&cid=172449125.1776799098&gtm=45je64h1v868420704za200zd868420704&rcb=19&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115616985~115938466~115938468~117266401~118128923 — 204 — 558 B — 99 ms — h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-CZHCF49R69&cid=172449125.1776799098&gtm=45je64h1v868420704za200zd868420704&rcb=19&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115616985~115938466~115938468~117266401~118128923&z=751605698www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-CZHCF49R69&cid=172449125.1776799098&gtm=45je64h1v868420704za200zd868420704&rcb=19&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115616985~115938466~115938468~117266401~118128923&z=751605698 — 200 — 408 B — 102 ms — h2https://accounts.google.com/gsi/clientaccounts.google.com/gsi/client https://accounts.google.com/gsi/client — 200 — 96.4 KiB — 144 ms — h2https://www.google.com/recaptcha/enterprise.js?render=6LfobFMqAAAAAKTnW9p0QDKrpzZHN_77ZsuQ8Z86www.google.com/recaptcha/enterprise... https://www.google.com/recaptcha/enterprise.js?render=6LfobFMqAAAAAKTnW9p0QDKrpzZHN_77ZsuQ8Z86 — 200 — 1.1 KiB — 67 ms — h3https://stumbleupon.com/favicon.ico/favicon.ico https://stumbleupon.com/favicon.ico — 200 — 2.3 KiB — 101 ms — h2https://link.mix.com/uY9maDKabpb?deeplink_url=https%3A%2F%2Fmix.com%2F&%24deeplink_path=mix.com%2Flink.mix.com/uY9maDKabpb?deeplink_u... https://link.mix.com/uY9maDKabpb?deeplink_url=https%3A%2F%2Fmix.com%2F&%24deeplink_path=mix.com%2F — 307 — 578 B — 668 ms — http/1.1https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 362.4 KiB — 183 ms — h2https://accounts.google.com/gsi/styleaccounts.google.com/gsi/style https://accounts.google.com/gsi/style — 200 — 642 B — 30 ms — h2https://accounts.google.com/gsi/log?client_id=165350503895-c55q7fbk6p04v12mt1un4buo27dgbc1b.apps.googleusercontent.com&as=Kui8xUgben1tOPo19%2FOM8jOc7QaGYM%2BJiW4UTGL7ieY&bs=oi1ygwF9Ee4aTpNVlhSmYfbhpZBief6SMYyfKLxF0h4&event=onetap.bottomSheet.prompt.apiCall&enable_itp_optimization=21accounts.google.com/gsi/log?client_... https://accounts.google.com/gsi/log?client_id=165350503895-c55q7fbk6p04v12mt1un4buo27dgbc1b.apps.googleusercontent.com&as=Kui8xUgben1tOPo19%2FOM8jOc7QaGYM%2BJiW4UTGL7ieY&bs=oi1ygwF9Ee4aTpNVlhSmYfbhpZBief6SMYyfKLxF0h4&event=onetap.bottomSheet.prompt.apiCall&enable_itp_optimization=21 — 200 — 23 B — 77 ms — h3https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Semibold.67b590ff.woff2/_next/static/media/SharpSansDispNo... https://stumbleupon.com/_next/static/media/SharpSansDispNo1-Semibold.67b590ff.woff2 — 200 — 51.0 KiB — 112 ms — 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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
82% of JavaScript execution is third-party
First-party Third-party 1641ms · 251KB · $22/mo
www.gstatic.com
Other
Costly
Execution 766ms
Transfer 0 KB
Unused 49%
Monthly Cost $10/mo
Unattributable
Other
Costly
Execution 450ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 287ms
Transfer 155 KB
Unused 39%
Monthly Cost $4/mo
accounts.google.com
Other
Optional
Execution 138ms
Transfer 96 KB
Unused 71%
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • www.gstatic.com adds 766ms and costs ~$10/month
  • Unattributable adds 450ms and costs ~$6/month
  • Google Tag Manager adds 287ms and costs ~$4/month

82% 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

www.gstatic.com takes 766ms 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 450ms 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 287ms 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

71% of accounts.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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