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https://fashionnova.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
1
PASS
8
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.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

7.25 s

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

9.20 s

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

6.16 s

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.

7.25 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.

40.20 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
16
8 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
4.9 MB transferred, 327 requests
FIX
4.9 MB transferred, 327 requests
Critical::
Page weighs 14.9 MB (4.9 MB transferred)
Warning::
JavaScript is 3.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.7 MB
Info::
Fonts are 387 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 387 KB
Warning::
327 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.0 g CO2 per page load
4.9 MB / 2.4 MB budget
4.9 MB transferred
327 requests
1.0 g CO2 per page load
JavaScript 3.7 MiB 76%
Images 461.1 KiB 9%
Fonts 387.5 KiB 8%
HTML 171.0 KiB 3%
CSS 81.0 KiB 2%
Other 59.4 KiB 1%
Other 17.8 KiB 0%
Other 7.2 KiB 0%
Other 4.1 KiB 0%
Other 0 B 0%
Other 0 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

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 (4.9 MiB of 4.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
17070ms total JS execution
FIX
17070ms total JS execution
Warning::
https://cdn.shopify.com/oxygen-v2/29900/17398/3590...: 3028ms CPU time
Warning::
https://cdn.shopify.com/oxygen-v2/29900/17398/3590...: 2514ms CPU time
Warning::
Unattributable: 2199ms CPU time
Warning::
https://www.fashionnova.com/: 1732ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5R5...: 1068ms CPU time
Warning::
Third-party scripts: 17070ms (100% of total)

Main Thread Breakdown

Script Evaluation 68% Other 14% Script Parsing & Compilation 7% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/index-CxT3hMUT.js3028ms2910ms2ms3rd
https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/entry.client-ShI81eut.js2514ms2249ms1ms3rd
Unattributable2199ms576ms0ms3rd
https://www.fashionnova.com/1732ms49ms70ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5R54C8M1068ms878ms96ms3rd
https://www.googletagmanager.com/gtag/destination?id=G-CHPZC04957&cx=c&gtm=4e6461929ms732ms71ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-964745028533ms475ms54ms3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js415ms256ms71ms3rd
https://cdn.optimizely.com/js/26979700476.js411ms371ms38ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-17897115191&cx=c&gtm=4e6461379ms324ms52ms3rd

Showing top 10 of 36 scripts

F
JS Bundles
Action
191 scripts, 1.5 MB unused
FIX
191 scripts, 1.5 MB unused
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://cdn.shopify.com/oxygen-v2/29900/17398/3590...: 120 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CHPZ...: 110 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.5 MB
1523 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/root-B1VWZC5S.js158 KB120 KB (76%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CHPZC04957&cx=c&gtm=4e6461165 KB110 KB (67%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-964745028&cx=c&gtm=4e6461144 KB105 KB (72%)✓3rd
https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_e645891259bb60090bde423588e192e6.br.js120 KB60 KB (50%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js110 KB58 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=G-CHPZC04957&cx=c&gtm=4e6461165 KB58 KB (35%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5R54C8M188 KB55 KB (29%)✓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
34 images, 0 KB saveable
REVIEW
34 images, 0 KB saveable
Warning::
https://assets.bounceexchange.com/assets/uploads/c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
34 images 461 KB
0 oversized -0 KB
16 legacy format
1 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

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 (387 KB)
PASS
10 fonts (387 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

387 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 7.3 s LCP 9.2 shttps://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-regular-6iL5fLYO.otfmark-simonson-proxima-n... https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-regular-6iL5fLYO.otf — 38.8 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/field-gothic-BKscQOkG.otffield-gothic-BKscQOkG.otf https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/field-gothic-BKscQOkG.otf — 36.4 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-semibold-ChC6l_3H.otfmark-simonson-proxima-n... https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-semibold-ChC6l_3H.otf — 52.3 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-extrabold-zKE1y2Tz.otfmark-simonson-proxima-n... https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-extrabold-zKE1y2Tz.otf — 53.8 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-black-DQbc3XgK.otfmark-simonson-proxima-n... https://cdn.shopify.com/oxygen-v2/29900/17398/35909/3318113/assets/mark-simonson-proxima-nova-black-DQbc3XgK.otf — 52.3 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/e37e5a/00000000000000007735e60d/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3l https://use.typekit.net/af/e37e5a/00000000000000007735e60d/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3 — 29.7 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/d7ff92/00000000000000007735e609/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/d7ff92/00000000000000007735e609/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 29.8 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/99d25e/00000000000000007735e611/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3l https://use.typekit.net/af/99d25e/00000000000000007735e611/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n8&v=3 — 30.5 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/846224/00000000000000007735e602/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n9&v=3l https://use.typekit.net/af/846224/00000000000000007735e602/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n9&v=3 — 30.1 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: swap
mark-simonson-proxima-n... otf swap
Size 39 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
field-gothic-BKscQOkG.otf otf swap
Size 36 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
mark-simonson-proxima-n... otf swap
Size 52 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
mark-simonson-proxima-n... otf swap
Size 54 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
mark-simonson-proxima-n... otf swap
Size 52 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
l woff2 swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 31 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 30 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
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 ~70 KB and ~140 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
4
dns-prefetch
—
prefetch
—

4 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: Cloudflare

Network Waterfall
327 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 17070ms · 2188KB · €90/mo
cdn.shopify.com
Other
Costly
Execution 3028ms
Transfer 41 KB
Monthly Cost €16/mo
cdn.shopify.com
Other
Costly
Execution 2514ms
Transfer 36 KB
Monthly Cost €13/mo
Unattributable
Other
Costly
Execution 2199ms
Transfer 0 KB
Monthly Cost €12/mo
www.fashionnova.com
Other
Costly
Execution 1732ms
Transfer 139 KB
Monthly Cost €9/mo
Google Tag Manager
Tag Manager
Costly
Execution 1068ms
Transfer 188 KB
Unused 29%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 929ms
Transfer 165 KB
Unused 35%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 533ms
Transfer 145 KB
Unused 38%
Monthly Cost €3/mo
analytics.tiktok.com
Other
Costly
Execution 415ms
Transfer 110 KB
Unused 53%
Monthly Cost €2/mo
Optimizely
A/B Testing
Costly
Execution 411ms
Transfer 91 KB
Unused 46%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 379ms
Transfer 137 KB
Unused 39%
Monthly Cost €2/mo
www.gstatic.com
Other
Costly
Execution 362ms
Transfer 0 KB
Unused 49%
Monthly Cost €2/mo
Facebook Pixel
Advertising
Costly
Execution 291ms
Transfer 95 KB
Unused 34%
Monthly Cost €2/mo
assets.bounceexchange.com
Other
Costly
Execution 289ms
Transfer 120 KB
Unused 50%
Monthly Cost €2/mo
Microsoft Clarity
Session Replay
Costly
Execution 262ms
Transfer 26 KB
Monthly Cost €1/mo
assets.bounceexchange.com
Other
Costly
Execution 240ms
Transfer 11 KB
Monthly Cost €1/mo
transcend-cdn.com
Other
Costly
Execution 240ms
Transfer 93 KB
Unused 48%
Monthly Cost €1/mo
sc-static.net
Other
Optional
Execution 186ms
Transfer 25 KB
Monthly Cost €1/mo
j.northbeam.io
Other
Optional
Execution 184ms
Transfer 33 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 176ms
Transfer 37 KB
Monthly Cost €1/mo
undgb.fashionnova.com
Other
Optional
Execution 175ms
Transfer 48 KB
Unused 59%
Monthly Cost €1/mo
static.klaviyo.com
Other
Optional
Execution 161ms
Transfer 1 KB
Monthly Cost €1/mo
assets.bounceexchange.com
Other
Optional
Execution 155ms
Transfer 16 KB
Monthly Cost €1/mo
analytics.tiktok.com
Other
Optional
Execution 127ms
Transfer 40 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 115ms
Transfer 165 KB
Unused 67%
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 107ms
Transfer 9 KB
Monthly Cost €1/mo
transcend-cdn.com
Other
Optional
Execution 98ms
Transfer 55 KB
Unused 46%
Monthly Cost €1/mo
assets.bounceexchange.com
Other
Optional
Execution 92ms
Transfer 16 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 91ms
Transfer 144 KB
Unused 72%
Monthly Cost €0/mo
static-tracking.klaviyo.com
Other
Optional
Execution 77ms
Transfer 19 KB
Monthly Cost €0/mo
api.bounceexchange.com
Other
Optional
Execution 73ms
Transfer 1 KB
Monthly Cost €0/mo
assets.bounceexchange.com
Other
Optional
Execution 73ms
Transfer 5 KB
Monthly Cost €0/mo
assets.bounceexchange.com
Other
Optional
Execution 66ms
Transfer 106 KB
Monthly Cost €0/mo
assets.bounceexchange.com
Other
Optional
Execution 61ms
Transfer 30 KB
Monthly Cost €0/mo
cdn.shopify.com
Other
Optional
Execution 56ms
Transfer 20 KB
Monthly Cost €0/mo
static-tracking.klaviyo.com
Other
Optional
Execution 53ms
Transfer 14 KB
Monthly Cost €0/mo
static.klaviyo.com
Other
Optional
Execution 52ms
Transfer 8 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • cdn.shopify.com adds 3028ms and costs ~€16/month
  • cdn.shopify.com adds 2514ms and costs ~€13/month
  • Unattributable adds 2199ms and costs ~€12/month
  • www.fashionnova.com adds 1732ms and costs ~€9/month
  • Google Tag Manager adds 1068ms and costs ~€6/month
  • Google Tag Manager adds 929ms and costs ~€5/month
  • Google Tag Manager adds 533ms and costs ~€3/month
  • analytics.tiktok.com adds 415ms and costs ~€2/month
  • Optimizely adds 411ms and costs ~€2/month
  • Google Tag Manager adds 379ms and costs ~€2/month
  • www.gstatic.com adds 362ms and costs ~€2/month
  • Facebook Pixel adds 291ms and costs ~€2/month
  • assets.bounceexchange.com adds 289ms and costs ~€2/month
  • Microsoft Clarity adds 262ms and costs ~€1/month
  • assets.bounceexchange.com adds 240ms and costs ~€1/month
  • transcend-cdn.com adds 240ms and costs ~€1/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

cdn.shopify.com takes 3028ms 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

cdn.shopify.com takes 2514ms 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 2199ms 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.fashionnova.com takes 1732ms 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 1068ms 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 929ms 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 533ms 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 415ms 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

53% 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

Optimizely takes 411ms 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 379ms 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.gstatic.com takes 362ms 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

Facebook Pixel takes 291ms 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

assets.bounceexchange.com takes 289ms 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 assets.bounceexchange.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

Microsoft Clarity takes 262ms 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

assets.bounceexchange.com takes 240ms 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

transcend-cdn.com takes 240ms 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 undgb.fashionnova.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

67% 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

72% 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

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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