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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
65
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
52
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
81
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
77
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.

1.18 s

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

4.76 s

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

322 ms

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

0.019

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

4.29 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.

6.62 s

Page Load Progression

914 ms
1.8 s
2.7 s
3.7 s
4.6 s
5.5 s
6.4 s
7.3 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
12.2 MB transferred, 196 requests
FIX
12.2 MB transferred, 196 requests
Critical::
Page weighs 20.3 MB (12.2 MB transferred)
Warning::
Images are 3.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.2 MB
Warning::
JavaScript is 2.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.5 MB
Info::
Fonts are 283 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 283 KB
Warning::
196 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.6 g CO2 per page load
12.2 MB / 2.4 MB budget
12.2 MB transferred
196 requests
2.6 g CO2 per page load
Other 5.6 MiB 46%
Images 3.2 MiB 26%
JavaScript 2.5 MiB 21%
Other 430.4 KiB 3%
Fonts 282.7 KiB 2%
CSS 131.0 KiB 1%
HTML 63.1 KiB 1%
Other 2.1 KiB 0%
Other 1.8 KiB 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (12.1 MiB of 12.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3943ms total JS execution
FIX
3943ms total JS execution
Warning::
Unattributable: 871ms CPU time
Warning::
https://www-assets.withings.com/site/js/cart.sideb...: 728ms CPU time
Warning::
https://www-assets.withings.com/site/js/main.wi.mi...: 555ms CPU time
Warning::
https://www.withings.com/eu/en/: 529ms CPU time
Warning::
https://metrics.withings.com/f37tye7q7kpxzba.js?aw...: 400ms CPU time
Warning::
Third-party scripts: 3414ms (87% of total)

Main Thread Breakdown

Script Evaluation 50% Other 24% Style & Layout 13% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable871ms141ms0ms3rd
https://www-assets.withings.com/site/js/cart.sidebar/prod/en/polyfills.bbe2b420840e6ddf7153e0d6b975ba3fcaf4d038.js728ms583ms0ms3rd
https://www-assets.withings.com/site/js/main.wi.min.bbe2b420840e6ddf7153e0d6b975ba3fcaf4d038.js555ms213ms43ms3rd
https://www.withings.com/eu/en/529ms34ms4ms1st
https://metrics.withings.com/f37tye7q7kpxzba.js?aw=TH6CL4400ms360ms30ms3rd
https://sdk.privacy-center.org/sdk/5d68cf27fcc4e658e7bf39722c7dd84c606f7f7b/modern/sdk.5d68cf27fcc4e658e7bf39722c7dd84c606f7f7b.js257ms160ms16ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WLCVVSPW186ms164ms20ms3rd
https://sdk.privacy-center.org/sdk/5d68cf27fcc4e658e7bf39722c7dd84c606f7f7b/modern/ui-web-en-web.5d68cf27fcc4e658e7bf39722c7dd84c606f7f7b.js125ms46ms11ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js118ms74ms40ms3rd
https://static.klaviyo.com/onsite/js/build-preview/commit-f6f00cac0c842ff6b918911ae9159db809c1b007/sharedUtils.bee471ed1ccdfc7f7848.js?cb=2115ms105ms4ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
55 scripts, 1.3 MB unused
FIX
55 scripts, 1.3 MB unused
Warning::
https://www-assets.withings.com/site/js/main.wi.mi...: 189 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www-assets.withings.com/site/js/cart.sideb...: 170 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.3 MB
1318 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www-assets.withings.com/site/js/main.wi.min.bbe2b420840e6ddf7153e0d6b975ba3fcaf4d038.js264 KB189 KB (72%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js362 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www-assets.withings.com/site/js/cart.sidebar/prod/en/main.bbe2b420840e6ddf7153e0d6b975ba3fcaf4d038.js290 KB170 KB (59%)✓3rd
https://js.klarna.com/web-sdk/v1/1.0.192/sdk.js136 KB72 KB (53%)✓3rd
https://metrics.withings.com/f37tye7q7kpxzba.js?aw=TH6CL4153 KB67 KB (44%)✓3rd
https://www-assets.withings.com/site/js/account.sidebar/prod/en/main.bbe2b420840e6ddf7153e0d6b975ba3fcaf4d038.js97 KB64 KB (66%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WLCVVSPW140 KB62 KB (45%)✓3rd
https://maps.googleapis.com/maps-api-v3/api/js/64/7d/main.js83 KB54 KB (66%)✓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
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.

C
Image Optimization
Action
93 images, 0 KB saveable
REVIEW
93 images, 0 KB saveable
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://media.withings.com/web/images/homepage/log... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://media-cdn.withings.com/press/logo_withings... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://image-cache.withings.com/site/media/wi_pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
93 images 3.2 MB
0 oversized -0 KB
89 legacy format
22 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

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

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

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

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

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

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

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
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
6 fonts (283 KB)
PASS
6 fonts (283 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

283 KB total

Render-blocking

0

of 6

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 1.2 s LCP 4.8 shttps://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Regular.woff2Aeonik-Regular.woff2 https://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Regular.woff2 — 42.0 KiB — 0 ms — font-display: swaphttps://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Medium.woff2Aeonik-Medium.woff2 https://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Medium.woff2 — 44.0 KiB — 0 ms — font-display: swaphttps://www-assets.withings.com/site/media/fonts/icons/withings-icon.ttf?ktibljwithings-icon.ttf https://www-assets.withings.com/site/media/fonts/icons/withings-icon.ttf?ktiblj — 74.8 KiB — 0 ms — font-display: swaphttps://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Light.woff2Aeonik-Light.woff2 https://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Light.woff2 — 43.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Bold.woff2Aeonik-Bold.woff2 https://www-assets.withings.com/site/media/fonts/aeonik/Aeonik-Bold.woff2 — 44.7 KiB — 0 ms — font-display: swap
Aeonik-Regular.woff2 woff2 swap
Size 42 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Aeonik-Medium.woff2 woff2 swap
Size 44 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
withings-icon.ttf ttf swap
Size 75 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Aeonik-Light.woff2 woff2 swap
Size 43 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Aeonik-Bold.woff2 woff2 swap
Size 45 KB
Load time 0 ms
Start 0 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)

Fixing the unchecked items could save ~22 KB and ~44 ms

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
Network Waterfall
196 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
87% of JavaScript execution is third-party
First-party Third-party 3414ms · 823KB · €18/mo
Unattributable
Other
Costly
Execution 871ms
Transfer 0 KB
Monthly Cost €5/mo
www-assets.withings.com
Other
Costly
Execution 728ms
Transfer 18 KB
Monthly Cost €4/mo
www-assets.withings.com
Other
Costly
Execution 555ms
Transfer 264 KB
Unused 72%
Monthly Cost €3/mo
metrics.withings.com
Other
Costly
Execution 400ms
Transfer 153 KB
Unused 44%
Monthly Cost €2/mo
sdk.privacy-center.org
Other
Costly
Execution 257ms
Transfer 90 KB
Unused 49%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 186ms
Transfer 140 KB
Unused 45%
Monthly Cost €1/mo
sdk.privacy-center.org
Other
Optional
Execution 125ms
Transfer 53 KB
Monthly Cost €1/mo
www.gstatic.com
Other
Optional
Execution 118ms
Transfer 0 KB
Unused 49%
Monthly Cost €1/mo
static.klaviyo.com
Other
Optional
Execution 115ms
Transfer 23 KB
Monthly Cost €1/mo
maps.googleapis.com
Other
Optional
Execution 58ms
Transfer 83 KB
Unused 66%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 871ms and costs ~€5/month
  • www-assets.withings.com adds 728ms and costs ~€4/month
  • www-assets.withings.com adds 555ms and costs ~€3/month
  • metrics.withings.com adds 400ms and costs ~€2/month
  • sdk.privacy-center.org adds 257ms and costs ~€1/month

87% 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

Unattributable takes 871ms 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

www-assets.withings.com takes 728ms 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

www-assets.withings.com takes 555ms 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

72% of www-assets.withings.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

metrics.withings.com takes 400ms 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

sdk.privacy-center.org takes 257ms 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

66% of maps.googleapis.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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