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https://fentybeauty.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
29
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
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.
83
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.

2.49 s

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

13.37 s

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

847 ms

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

0.027

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

7.65 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.

15.38 s

Page Load Progression

1.2 s
2.5 s
3.7 s
4.9 s
6.2 s
7.4 s
8.6 s
9.9 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
25.4 MB transferred, 686 requests
FIX
25.4 MB transferred, 686 requests
Critical::
Page weighs 37.3 MB (25.4 MB transferred)
Warning::
Images are 9.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 9.1 MB
Info::
Fonts are 4.7 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 4.7 MB
Warning::
JavaScript is 2.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.9 MB
Info::
CSS is 285 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 285 KB
Warning::
686 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.3 g CO2 per page load
25.4 MB / 2.4 MB budget
25.4 MB transferred
686 requests
5.3 g CO2 per page load
Images 9.1 MiB 36%
Other 6.0 MiB 24%
Fonts 4.7 MiB 19%
JavaScript 2.9 MiB 11%
Other 1.3 MiB 5%
Other 982.2 KiB 4%
CSS 284.9 KiB 1%
HTML 241.7 KiB 1%
Other 11.9 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

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

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

Why this matters

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

Source: web.dev

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

Why this matters

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

Source: web.dev

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

F
JS Execution Cost
Action
6710ms total JS execution
FIX
6710ms total JS execution
Warning::
https://fentybeauty.com/cdn/shop/t/2541/assets/mai...: 1508ms CPU time
Warning::
Unattributable: 1261ms CPU time
Warning::
https://cdn.clarip.com/kendo/cookieconsent/assets/...: 969ms CPU time
Warning::
https://fentybeauty.com/en-fr: 659ms CPU time
Warning::
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1...: 500ms CPU time
Warning::
Third-party scripts: 4016ms (60% of total)

Main Thread Breakdown

Script Evaluation 58% Other 27% Style & Layout 6%
ScriptTotalScriptingParse/CompileParty
https://fentybeauty.com/cdn/shop/t/2541/assets/main.js?v=1074569545271950146217755849821508ms482ms7ms1st
Unattributable1261ms128ms0ms3rd
https://cdn.clarip.com/kendo/cookieconsent/assets/js/clarip-cookie-manager.min.js969ms940ms1ms3rd
https://fentybeauty.com/en-fr659ms51ms31ms1st
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js500ms476ms10ms3rd
https://cdn.shopify.com/extensions/019d6686-d4c4-7fe7-ace0-90cf1d447b49/free-gift-28-723/assets/customDiscountLogic.js323ms314ms7ms3rd
https://rapid-cdn.yottaa.com/rapid/lib/nPlpm4Nf5zlWgQ.js251ms231ms8ms3rd
https://cdn.shopify.com/extensions/019d59a1-02f7-7559-bd14-8ff7eaf3ebe2/rivo-loyalty-rewards-referrals-760/assets/ba_rivo_profile.js169ms136ms9ms3rd
https://fentybeauty.com/cdn/shop/t/2541/assets/c58bf3d76e9c3a736126.js165ms134ms0ms1st
https://widget.gotolstoy.com/we/widget.js138ms86ms0ms3rd

Showing top 10 of 20 scripts

F
JS Bundles
Action
322 scripts, 800 KB unused
FIX
322 scripts, 800 KB unused
Warning::
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1...: 87 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T2G...: 82 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.klarna.com/web-sdk/v1/1.0.192/sdk.js: 72 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-M8T...: 60 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.shopify.com/extensions/019d4e1d-40d9-7...: 58 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 800 KB
800 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js220 KB87 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T2GNQQF162 KB82 KB (51%)✓3rd
https://js.klarna.com/web-sdk/v1/1.0.192/sdk.js136 KB72 KB (53%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M8TQZPX143 KB60 KB (42%)✓3rd
https://cdn.shopify.com/extensions/019d4e1d-40d9-7f98-9bf4-614ed7f2fe1a/narvar-test-app-208/assets/shipping-protection-cart-widget.js85 KB58 KB (69%)✓3rd
https://play.gotolstoy.com/widget-v2/widget.js79 KB46 KB (59%)✓3rd
https://cdn.shopify.com/extensions/019d6686-d4c4-7fe7-ace0-90cf1d447b49/free-gift-28-723/assets/freeGiftLogicv1.js66 KB43 KB (66%)✗3rd
https://fentybeauty.com/cdn/shop/t/2541/assets/main.js?v=10745695452719501462177558498280 KB41 KB (52%)✓1st
https://cdn.shopify.com/extensions/019d6686-d4c4-7fe7-ace0-90cf1d447b49/free-gift-28-723/assets/customDiscountLogic.js50 KB41 KB (84%)✗3rd
https://snapui.searchspring.io/cv6gyn/bundle.js67 KB40 KB (60%)✓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.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Third-Party Impact
57% third-party, 0 ms blocking
REVIEW
57% third-party, 0 ms blocking
Warning::
Third-party code accounts for 57% of page weight (14.5 MiB of 25.4 MiB)
Info::
Third-party blocking time is low (0 ms)
43%
57%
First-party Third-party
B
Image Optimization
117 images, 0 KB saveable
REVIEW
117 images, 0 KB saveable
Info::
All images are well-optimized
117 images 9.1 MB
0 oversized -0 KB
19 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
11 fonts (4892 KB)
PASS
11 fonts (4892 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

4892 KB total

Render-blocking

0

of 11

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 FCP 2.5 s LCP 13.4 shttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Regular.woff2?v=96920616465222533761775584645Brown-Regular.woff2 https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Regular.woff2?v=96920616465222533761775584645 — 0 B — 0 ms — font-display: swaphttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Regular.woff?v=150921627919260360721775584644Brown-Regular.woff https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Regular.woff?v=150921627919260360721775584644 — 0 B — 0 ms — font-display: swaphttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Bold.woff2?v=133987530232962950581775584641Brown-Bold.woff2 https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Bold.woff2?v=133987530232962950581775584641 — 1.7 MiB — 0 ms — font-display: swaphttps://staticw2.yotpo.com/assets/yotpo-widget-font.woff?version=2022-04-24_06-59-01yotpo-widget-font.woff https://staticw2.yotpo.com/assets/yotpo-widget-font.woff?version=2022-04-24_06-59-01 — 12.4 KiB — 0 ms — font-display: swaphttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Bold.woff?v=103279414557816002091775584641Brown-Bold.woff https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Bold.woff?v=103279414557816002091775584641 — 22.8 KiB — 0 ms — font-display: swaphttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Light.woff2?v=92417530555184451481775584643Brown-Light.woff2 https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Light.woff2?v=92417530555184451481775584643 — 2.9 MiB — 0 ms — font-display: swaphttps://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Light.ttf?v=88026038986199904091775584642Brown-Light.ttf https://fentybeauty.com/cdn/shop/t/2541/assets/Brown-Light.ttf?v=88026038986199904091775584642 — 36.9 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2GTStandard-MRegular.woff2 https://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2 — 63.2 KiB — 0 ms — font-display: swaphttps://assets.gotolstoy.com/public/assets/bd3161d4-1781-4242-943e-8523aa13dd3b/custom-font-bold-700.otf?1732555505416custom-font-bold-700.otf https://assets.gotolstoy.com/public/assets/bd3161d4-1781-4242-943e-8523aa13dd3b/custom-font-bold-700.otf?1732555505416 — 40.1 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0341/3458/9485/files/Brown-Regular_fe5d22c7-c5fb-43db-b7db-0eba7158d18d.woff?v=1679586310Brown-Regular_fe5d22c7-... https://cdn.shopify.com/s/files/1/0341/3458/9485/files/Brown-Regular_fe5d22c7-c5fb-43db-b7db-0eba7158d18d.woff?v=1679586310 — 22.0 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0341/3458/9485/files/Brown-Bold_f618d14c-7f8a-45c7-9481-237c78f49585.woff?v=1679586310Brown-Bold_f618d14c-7f8... https://cdn.shopify.com/s/files/1/0341/3458/9485/files/Brown-Bold_f618d14c-7f8a-45c7-9481-237c78f49585.woff?v=1679586310 — 22.8 KiB — 0 ms — font-display: swap
Brown-Regular.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Brown-Regular.woff woff swap
Size 0 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
Brown-Bold.woff2 woff2 swap
Size 1728 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
yotpo-widget-font.woff woff swap
Size 12 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
Brown-Bold.woff woff swap
Size 23 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
Brown-Light.woff2 woff2 swap
Size 2944 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Brown-Light.ttf ttf swap
Size 37 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
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
custom-font-bold-700.otf otf swap
Size 40 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
Brown-Regular_fe5d22c7-... woff swap
Size 22 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
Brown-Bold_f618d14c-7f8... woff swap
Size 23 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 ~2383 KB and ~4766 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
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
686 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
60% of JavaScript execution is third-party
First-party Third-party 4016ms · 658KB · €21/mo
Unattributable
Other
Costly
Execution 1261ms
Transfer 0 KB
Monthly Cost €7/mo
cdn.clarip.com
Other
Costly
Execution 969ms
Transfer 10 KB
Monthly Cost €5/mo
7ce243a1e1a2.cdn4.forter.com
Other
Costly
Execution 500ms
Transfer 220 KB
Unused 40%
Monthly Cost €3/mo
cdn.shopify.com
Other
Costly
Execution 323ms
Transfer 50 KB
Unused 84%
Monthly Cost €2/mo
rapid-cdn.yottaa.com
Other
Costly
Execution 251ms
Transfer 45 KB
Unused 58%
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 169ms
Transfer 63 KB
Unused 43%
Monthly Cost €1/mo
widget.gotolstoy.com
Other
Optional
Execution 138ms
Transfer 38 KB
Monthly Cost €1/mo
d38xvr37kwwhcm.cloudfront.net
Other
Optional
Execution 106ms
Transfer 16 KB
Monthly Cost €1/mo
urldefense.com
Other
Optional
Execution 84ms
Transfer 0 KB
Monthly Cost €0/mo
otlhn.fentybeauty.com
Other
Optional
Execution 79ms
Transfer 48 KB
Unused 56%
Monthly Cost €0/mo
crossborder-integration.global-e.com
Other
Optional
Execution 73ms
Transfer 23 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 62ms
Transfer 143 KB
Unused 42%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 1261ms and costs ~€7/month
  • cdn.clarip.com adds 969ms and costs ~€5/month
  • 7ce243a1e1a2.cdn4.forter.com adds 500ms and costs ~€3/month
  • cdn.shopify.com adds 323ms and costs ~€2/month
  • rapid-cdn.yottaa.com adds 251ms and costs ~€1/month

60% of JavaScript execution time comes from third-party scripts.

Why this matters

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

Learn more ▾

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

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 1261ms 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.clarip.com takes 969ms 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

7ce243a1e1a2.cdn4.forter.com takes 500ms 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 323ms 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

84% of cdn.shopify.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

rapid-cdn.yottaa.com takes 251ms 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

58% of rapid-cdn.yottaa.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

56% of otlhn.fentybeauty.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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