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https://gymshark.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
28
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
66
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.
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.

3.66 s

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

16.34 s

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

8.94 s

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

0.048

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

20.36 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.

57.26 s

Page Load Progression

1.5 s
3.0 s
4.5 s
6.0 s
7.4 s
8.9 s
10.4 s
11.9 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
54.5 MB transferred, 287 requests
FIX
54.5 MB transferred, 287 requests
Critical::
Page weighs 66.0 MB (54.5 MB transferred)
Warning::
Images are 4.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.7 MB
Warning::
JavaScript is 3.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.8 MB
Warning::
287 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 11.4 g CO2 per page load
54.5 MB / 2.4 MB budget
54.5 MB transferred
287 requests
11.4 g CO2 per page load
Other 45.5 MiB 84%
Images 4.7 MiB 9%
JavaScript 3.8 MiB 7%
CSS 187.9 KiB 0%
Fonts 138.7 KiB 0%
Other 102.1 KiB 0%
HTML 99.5 KiB 0%
Other 30.5 KiB 0%
Other 27.8 KiB 0%
Other 6.6 KiB 0%
Other 797 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

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 (54.5 MiB of 54.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
37313ms total JS execution
FIX
37313ms total JS execution
Warning::
https://www.gymshark.com/: 10980ms CPU time
Warning::
https://www.gymshark.com/_next/static/chunks/frame...: 7692ms CPU time
Warning::
Unattributable: 3916ms CPU time
Warning::
https://www.gymshark.com/_next/static/chunks/pages...: 3274ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WQX...: 2642ms CPU time
Warning::
Third-party scripts: 37313ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 25% Rendering 10% Style & Layout 9% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.gymshark.com/10980ms67ms4ms3rd
https://www.gymshark.com/_next/static/chunks/framework-37ae32f58c38fef9.js7692ms6134ms22ms3rd
Unattributable3916ms408ms0ms3rd
https://www.gymshark.com/_next/static/chunks/pages/_app-77dacc2b8f5bc3cc.js3274ms2479ms469ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WQXVFFG&gtm_auth=&gtm_preview=&gtm_cookies_win=x2642ms2376ms159ms3rd
https://10ef4229c7d0.edge.sdk.awswaf.com/10ef4229c7d0/f2cb19c6a7d6/challenge.js1486ms1256ms191ms3rd
https://js.intercomcdn.com/frame-modern.40aacdf2.js1111ms820ms83ms3rd
https://cdn.dynamicyield.com/api/8786363/api_static.js1084ms513ms47ms3rd
https://www.googletagmanager.com/gtag/destination?id=G-PQJ0N2K1QF&cx=c&gtm=4e6411925ms836ms71ms3rd
https://www.googletagmanager.com/gtag/destination?id=DC-12566443&cx=c&gtm=4e6411540ms471ms61ms3rd

Showing top 10 of 29 scripts

F
JS Bundles
Action
64 scripts, 1.9 MB unused
FIX
64 scripts, 1.9 MB unused
Warning::
https://www.gymshark.com/_next/static/chunks/pages...: 689 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://10ef4229c7d0.edge.sdk.awswaf.com/10ef4229c...: 265 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.intercomcdn.com/frame-modern.40aacdf2.j...: 122 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PQJ0...: 112 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.intercomcdn.com/vendor-modern.df860bed....: 86 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.9 MB
1954 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gymshark.com/_next/static/chunks/pages/_app-77dacc2b8f5bc3cc.js1113 KB689 KB (62%)✓3rd
https://10ef4229c7d0.edge.sdk.awswaf.com/10ef4229c7d0/f2cb19c6a7d6/challenge.js506 KB265 KB (52%)✓3rd
https://js.intercomcdn.com/frame-modern.40aacdf2.js192 KB122 KB (64%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PQJ0N2K1QF&cx=c&gtm=4e6411172 KB112 KB (65%)✓3rd
https://js.intercomcdn.com/vendor-modern.df860bed.js144 KB86 KB (60%)✓3rd
https://jssdkcdns.mparticle.com/js/v2/eu1-ebd2cad076757c498ce604d818b0d8ae/mparticle.js?env=0&plan_id=gymshark_data_plan_shop133 KB80 KB (60%)✓3rd
https://www.gymshark.com/_next/static/chunks/pages/collections/%5BcollectionSlug%5D/%5B%5B...genderSlug%5D%5D-f2f28871b3adea1e.js0 KB61 KB (80%)✓3rd
https://www.gymshark.com/_next/static/chunks/pages/collections/%5BcollectionSlug%5D/%5B%5B...genderSlug%5D%5D-f2f28871b3adea1e.js21 KB61 KB (80%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-12566443&cx=c&gtm=4e6411129 KB61 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-933026149&cx=c&gtm=4e6411132 KB60 KB (45%)✓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

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-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-store

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-store—Never cache this response
B
Image Optimization
106 images, 0 KB saveable
REVIEW
106 images, 0 KB saveable
Info::
All images are well-optimized
106 images 4.7 MB
0 oversized -0 KB
41 legacy format
0 missing dimensions CLS risk
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
10 fonts (139 KB)
PASS
10 fonts (139 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

139 KB total

Render-blocking

0

of 10

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 12.0 s 14.0 s 16.0 s FCP 3.7 s LCP 16.3 shttps://cdn.gymshark.com/fonts/Montserrat-Regular.woff2Montserrat-Regular.woff2 https://cdn.gymshark.com/fonts/Montserrat-Regular.woff2 — 28.6 KiB — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Montserrat-Bold.woff2Montserrat-Bold.woff2 https://cdn.gymshark.com/fonts/Montserrat-Bold.woff2 — 19.5 KiB — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Regular.woff2Roboto-Regular.woff2 https://cdn.gymshark.com/fonts/Roboto-Regular.woff2 — 22.3 KiB — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Bold.woff2Roboto-Bold.woff2 https://cdn.gymshark.com/fonts/Roboto-Bold.woff2 — 0 B — 0 ms — font-display: swaphttps://www.gymshark.com/_next/static/media/gymshark-icons.70b7ab93.woffgymshark-icons.70b7ab93... https://www.gymshark.com/_next/static/media/gymshark-icons.70b7ab93.woff — 23.5 KiB — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Regular.woff2Roboto-Regular.woff2 https://cdn.gymshark.com/fonts/Roboto-Regular.woff2 — 0 B — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Bold.woff2Roboto-Bold.woff2 https://cdn.gymshark.com/fonts/Roboto-Bold.woff2 — 0 B — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Medium.woff2Roboto-Medium.woff2 https://cdn.gymshark.com/fonts/Roboto-Medium.woff2 — 16.0 KiB — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Montserrat-Bold.woff2Montserrat-Bold.woff2 https://cdn.gymshark.com/fonts/Montserrat-Bold.woff2 — 0 B — 0 ms — font-display: swaphttps://cdn.gymshark.com/fonts/Roboto-Bold.woffRoboto-Bold.woff https://cdn.gymshark.com/fonts/Roboto-Bold.woff — 28.7 KiB — 0 ms — font-display: swap
Montserrat-Regular.woff2 woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Montserrat-Bold.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Roboto-Regular.woff2 woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Roboto-Bold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
gymshark-icons.70b7ab93... woff swap
Size 24 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
Roboto-Regular.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Roboto-Bold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Roboto-Medium.woff2 woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Montserrat-Bold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Roboto-Bold.woff woff swap
Size 29 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
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 ~16 KB and ~32 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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
Page uses 8 resource hint(s)

Current Resource Hints

preconnect
4
preload
3
dns-prefetch
—
prefetch
1

8 resource hints configured

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
287 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
100% of JavaScript execution is third-party
First-party Third-party 37313ms · 3933KB · $214/mo
www.gymshark.com
Other
Costly
Execution 10980ms
Transfer 84 KB
Monthly Cost $63/mo
www.gymshark.com
Other
Costly
Execution 7692ms
Transfer 42 KB
Monthly Cost $44/mo
Unattributable
Other
Costly
Execution 3916ms
Transfer 0 KB
Monthly Cost $22/mo
www.gymshark.com
Other
Costly
Execution 3274ms
Transfer 1113 KB
Unused 62%
Monthly Cost $19/mo
Google Tag Manager
Tag Manager
Costly
Execution 2642ms
Transfer 209 KB
Unused 24%
Monthly Cost $15/mo
10ef4229c7d0.edge.sdk.awswaf.com
Other
Costly
Execution 1486ms
Transfer 506 KB
Unused 52%
Monthly Cost $9/mo
js.intercomcdn.com
Other
Costly
Execution 1111ms
Transfer 192 KB
Unused 64%
Monthly Cost $6/mo
cdn.dynamicyield.com
Other
Costly
Execution 1084ms
Transfer 102 KB
Unused 57%
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 925ms
Transfer 172 KB
Unused 33%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 540ms
Transfer 129 KB
Unused 47%
Monthly Cost $3/mo
OneTrust
Consent
Essential
Execution 514ms
Transfer 80 KB
Unused 59%
Monthly Cost $3/mo
res4.applovin.com
Other
Costly
Execution 409ms
Transfer 31 KB
Monthly Cost $2/mo
analytics.tiktok.com
Other
Costly
Execution 378ms
Transfer 110 KB
Unused 50%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 376ms
Transfer 132 KB
Unused 44%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 345ms
Transfer 132 KB
Unused 45%
Monthly Cost $2/mo
Facebook Pixel
Advertising
Optional
Execution 195ms
Transfer 95 KB
Unused 35%
Monthly Cost $1/mo
Facebook Pixel
Advertising
Optional
Execution 194ms
Transfer 39 KB
Monthly Cost $1/mo
jssdkcdns.mparticle.com
Other
Optional
Execution 167ms
Transfer 133 KB
Unused 60%
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 153ms
Transfer 28 KB
Monthly Cost $1/mo
www.gymshark.com
Other
Optional
Execution 150ms
Transfer 38 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 133ms
Transfer 172 KB
Unused 65%
Monthly Cost $1/mo
web-assets.stylitics.com
Other
Optional
Execution 132ms
Transfer 59 KB
Monthly Cost $1/mo
js.intercomcdn.com
Other
Optional
Execution 109ms
Transfer 144 KB
Unused 60%
Monthly Cost $1/mo
Intercom Widget
Chat
Optional
Execution 99ms
Transfer 4 KB
Monthly Cost $1/mo
s.axon.ai
Other
Optional
Execution 67ms
Transfer 8 KB
Monthly Cost $0/mo
Bing UET
Advertising
Optional
Execution 66ms
Transfer 15 KB
Monthly Cost $0/mo
analytics.tiktok.com
Other
Optional
Execution 64ms
Transfer 40 KB
Monthly Cost $0/mo
www.gymshark.com
Other
Optional
Execution 62ms
Transfer 114 KB
Monthly Cost $0/mo
js.adsrvr.org
Other
Optional
Execution 51ms
Transfer 11 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • www.gymshark.com adds 10980ms and costs ~$63/month
  • www.gymshark.com adds 7692ms and costs ~$44/month
  • Unattributable adds 3916ms and costs ~$22/month
  • www.gymshark.com adds 3274ms and costs ~$19/month
  • Google Tag Manager adds 2642ms and costs ~$15/month
  • 10ef4229c7d0.edge.sdk.awswaf.com adds 1486ms and costs ~$9/month
  • js.intercomcdn.com adds 1111ms and costs ~$6/month
  • cdn.dynamicyield.com adds 1084ms and costs ~$6/month
  • Google Tag Manager adds 925ms and costs ~$5/month
  • Google Tag Manager adds 540ms and costs ~$3/month
  • res4.applovin.com adds 409ms and costs ~$2/month
  • analytics.tiktok.com adds 378ms and costs ~$2/month
  • Google Tag Manager adds 376ms and costs ~$2/month
  • Google Tag Manager adds 345ms and costs ~$2/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

www.gymshark.com takes 10980ms 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.gymshark.com takes 7692ms 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 3916ms 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.gymshark.com takes 3274ms 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

62% of www.gymshark.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

Google Tag Manager takes 2642ms 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

10ef4229c7d0.edge.sdk.awswaf.com takes 1486ms 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

52% of 10ef4229c7d0.edge.sdk.awswaf.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

js.intercomcdn.com takes 1111ms 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

64% of js.intercomcdn.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

cdn.dynamicyield.com takes 1084ms 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

57% of cdn.dynamicyield.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

Google Tag Manager takes 925ms 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 540ms 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

59% of OneTrust'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

res4.applovin.com takes 409ms 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

analytics.tiktok.com takes 378ms 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

50% of analytics.tiktok.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

Google Tag Manager takes 376ms 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 345ms 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

60% of jssdkcdns.mparticle.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

65% of Google Tag Manager'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

60% of js.intercomcdn.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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