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https://rarebeauty.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
26
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.

5.36 s

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

26.48 s

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

2.43 s

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

0.077

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

15.61 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.

47.80 s

Page Load Progression

1.2 s
2.4 s
3.7 s
4.9 s
6.1 s
7.3 s
8.6 s
9.8 s
Checks
16
8 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
41.7 MB transferred, 397 requests
FIX
41.7 MB transferred, 397 requests
Critical::
Page weighs 51.0 MB (41.7 MB transferred)
Warning::
JavaScript is 4.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.2 MB
Info::
Fonts are 271 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 271 KB
Warning::
397 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 8.7 g CO2 per page load
41.7 MB / 2.4 MB budget
41.7 MB transferred
397 requests
8.7 g CO2 per page load
Other 35.0 MiB 84%
JavaScript 4.2 MiB 10%
Other 1.3 MiB 3%
Images 620.6 KiB 1%
Fonts 271.2 KiB 1%
HTML 144.7 KiB 0%
Other 131.4 KiB 0%
CSS 40.3 KiB 0%
Other 29.3 KiB 0%
Other 16.6 KiB 0%
Other 1.5 KiB 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 (41.7 MiB of 41.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
17284ms total JS execution
FIX
17284ms total JS execution
Warning::
https://scripts.clarity.ms/0.8.59/clarity.js: 3217ms CPU time
Warning::
Unattributable: 3171ms CPU time
Warning::
https://www.rarebeauty.com/: 1896ms CPU time
Warning::
https://www.rarebeauty.com/cdn/wpm/b0e8c7c7aw41bd7...: 831ms CPU time
Warning::
https://assets.gorgias.chat/build/static/js/279.6b...: 633ms CPU time
Warning::
Third-party scripts: 17284ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 28% Style & Layout 9% Script Parsing & Compilation 7% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://scripts.clarity.ms/0.8.59/clarity.js3217ms1130ms13ms3rd
Unattributable3171ms252ms0ms3rd
https://www.rarebeauty.com/1896ms107ms32ms3rd
https://www.rarebeauty.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js831ms640ms18ms3rd
https://assets.gorgias.chat/build/static/js/279.6ba6eb825556cdb4.js633ms436ms19ms3rd
https://www.rarebeauty.com/cdn/shop/t/404/assets/app.js?v=79467176738483140861775597331601ms281ms65ms3rd
webpack:///./src/js/lib/ugc.js?529ms251ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-357011569502ms333ms165ms3rd
https://90e271ce78bc.cdn4.forter.com/sn/90e271ce78bc/script.js477ms391ms63ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MMKQH7Z426ms368ms50ms3rd

Showing top 10 of 42 scripts

F
JS Bundles
Action
196 scripts, 1.8 MB unused
FIX
196 scripts, 1.8 MB unused
Warning::
https://cdn.jsdelivr.net/npm/hls.js@latest: 145 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-33CG...: 111 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-33CG...: 111 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-357...: 105 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-357...: 105 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.8 MB
1827 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/hls.js@latest159 KB145 KB (91%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-33CGHVY44Y&cx=c&gtm=4e6461172 KB111 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-33CGHVY44Y&cx=c&gtm=4e6461172 KB111 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-357011569&cx=c&gtm=4e6461144 KB105 KB (73%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-357011569&cx=c&gtm=4e6461144 KB105 KB (73%)✓3rd
https://www.googletagmanager.com/gtag/js?id=GT-K5MK2GR&cx=c&gtm=4e6461136 KB105 KB (77%)✓3rd
https://www.googletagmanager.com/gtag/js?id=GT-WPQVGCX&cx=c&gtm=4e6461136 KB105 KB (77%)✓3rd
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js220 KB93 KB (43%)✓3rd
https://90e271ce78bc.cdn4.forter.com/sn/90e271ce78bc/script.js218 KB89 KB (41%)✓3rd
https://static.rechargecdn.com/assets/js/widget.min.js?shop=therarebeauty.myshopify.com119 KB75 KB (63%)✓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
C
Image Optimization
Action
39 images, 0 KB saveable
REVIEW
39 images, 0 KB saveable
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.shopify.com/s/files/1/0314/1143/7703/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://content.verasafe.com/trust-seal/trust_seal... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.rarebeauty.com/cdn/shop/files/swatch-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
39 images 621 KB
0 oversized -0 KB
17 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

Performance issues directly impact user engagement and conversion rates.

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

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
9 fonts (271 KB)
PASS
9 fonts (271 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

271 KB total

Render-blocking

0

of 9

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 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s FCP 5.4 s LCP 26.5 shttps://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-regular.woff2?v=92766390133576145611775597331neue-hass-unica-regular... https://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-regular.woff2?v=92766390133576145611775597331 — 19.6 KiB — 0 ms — font-display: swaphttps://www.rarebeauty.com/cdn/shop/t/404/assets/ogg-regular.woff2?v=118891629237246559021775597331ogg-regular.woff2 https://www.rarebeauty.com/cdn/shop/t/404/assets/ogg-regular.woff2?v=118891629237246559021775597331 — 60.5 KiB — 0 ms — font-display: swaphttps://www.rarebeauty.com/cdn/shop/t/404/assets/rarescript-regular.woff2?v=176122394251287531551775597331rarescript-regular.woff2 https://www.rarebeauty.com/cdn/shop/t/404/assets/rarescript-regular.woff2?v=176122394251287531551775597331 — 68.2 KiB — 0 ms — font-display: swaphttps://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-bold.woff2?v=85554310630904660111775597331neue-hass-unica-bold.woff2 https://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-bold.woff2?v=85554310630904660111775597331 — 19.3 KiB — 0 ms — font-display: swaphttps://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-medium.woff2?v=70845254785548219591775597331neue-hass-unica-medium.... https://www.rarebeauty.com/cdn/shop/t/404/assets/neue-hass-unica-medium.woff2?v=70845254785548219591775597331 — 19.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swap
neue-hass-unica-regular... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ogg-regular.woff2 woff2 swap
Size 60 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
rarescript-regular.woff2 woff2 swap
Size 68 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
neue-hass-unica-bold.woff2 woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
neue-hass-unica-medium.... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 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)
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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
Page uses 13 resource hint(s)

Current Resource Hints

preconnect
3
preload
2
dns-prefetch
1
prefetch
7

13 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
397 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 17284ms · 3003KB · €92/mo
Microsoft Clarity
Session Replay
Costly
Execution 3217ms
Transfer 26 KB
Monthly Cost €17/mo
Unattributable
Other
Costly
Execution 3171ms
Transfer 0 KB
Monthly Cost €17/mo
www.rarebeauty.com
Other
Costly
Execution 1896ms
Transfer 37 KB
Monthly Cost €10/mo
www.rarebeauty.com
Other
Costly
Execution 831ms
Transfer 61 KB
Unused 39%
Monthly Cost €4/mo
assets.gorgias.chat
Other
Costly
Execution 633ms
Transfer 93 KB
Unused 45%
Monthly Cost €3/mo
www.rarebeauty.com
Other
Costly
Execution 601ms
Transfer 148 KB
Monthly Cost €3/mo
Other
Costly
Execution 529ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 502ms
Transfer 144 KB
Unused 38%
Monthly Cost €3/mo
90e271ce78bc.cdn4.forter.com
Other
Costly
Execution 477ms
Transfer 218 KB
Unused 41%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 426ms
Transfer 166 KB
Unused 41%
Monthly Cost €2/mo
7ce243a1e1a2.cdn4.forter.com
Other
Costly
Execution 407ms
Transfer 220 KB
Unused 43%
Monthly Cost €2/mo
www.rarebeauty.com
Other
Costly
Execution 286ms
Transfer 28 KB
Monthly Cost €2/mo
cookie-cdn.cookiepro.com
Other
Costly
Execution 285ms
Transfer 98 KB
Unused 51%
Monthly Cost €2/mo
www.rarebeauty.com
Other
Costly
Execution 278ms
Transfer 38 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Costly
Execution 275ms
Transfer 172 KB
Unused 39%
Monthly Cost €1/mo
static.rechargecdn.com
Other
Costly
Execution 255ms
Transfer 119 KB
Unused 63%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Costly
Execution 203ms
Transfer 136 KB
Unused 47%
Monthly Cost €1/mo
Other
Optional
Execution 194ms
Transfer 0 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 190ms
Transfer 95 KB
Unused 32%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 187ms
Transfer 136 KB
Unused 47%
Monthly Cost €1/mo
assets.gorgias.chat
Other
Optional
Execution 185ms
Transfer 21 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 169ms
Transfer 42 KB
Monthly Cost €1/mo
(program):2
Other
Optional
Execution 159ms
Transfer 0 KB
Monthly Cost €1/mo
na-library.klarnaservices.com
Other
Optional
Execution 152ms
Transfer 110 KB
Unused 42%
Monthly Cost €1/mo
cdn.attn.tv
Other
Optional
Execution 145ms
Transfer 49 KB
Unused 57%
Monthly Cost €1/mo
assets.gorgias.chat
Other
Optional
Execution 132ms
Transfer 38 KB
Monthly Cost €1/mo
ajax.googleapis.com
Other
Optional
Execution 132ms
Transfer 33 KB
Unused 68%
Monthly Cost €1/mo
www.rarebeauty.com
Other
Optional
Execution 125ms
Transfer 21 KB
Monthly Cost €1/mo
www.rarebeauty.com
Other
Optional
Execution 125ms
Transfer 4 KB
Monthly Cost €1/mo
cdn.9gtb.com
Other
Optional
Execution 124ms
Transfer 61 KB
Unused 54%
Monthly Cost €1/mo
gdprcdn.b-cdn.net
Other
Optional
Execution 116ms
Transfer 65 KB
Unused 70%
Monthly Cost €1/mo
www.rarebeauty.com
Other
Optional
Execution 115ms
Transfer 31 KB
Monthly Cost €1/mo
assets.gorgias.chat
Other
Optional
Execution 98ms
Transfer 43 KB
Monthly Cost €1/mo
www.rarebeauty.com
Other
Optional
Execution 93ms
Transfer 4 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 86ms
Transfer 172 KB
Unused 65%
Monthly Cost €0/mo
www.rarebeauty.com
Other
Optional
Execution 86ms
Transfer 4 KB
Monthly Cost €0/mo
jsDelivr
CDN
Optional
Execution 77ms
Transfer 159 KB
Unused 91%
Monthly Cost €0/mo
www.rarebeauty.com
Other
Optional
Execution 75ms
Transfer 5 KB
Monthly Cost €0/mo
crossborder-integration.global-e.com
Other
Optional
Execution 72ms
Transfer 23 KB
Monthly Cost €0/mo
assets.dailykarma.io
Other
Optional
Execution 61ms
Transfer 21 KB
Monthly Cost €0/mo
cdn.yottaa.com
Other
Optional
Execution 57ms
Transfer 20 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 56ms
Transfer 144 KB
Unused 73%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Microsoft Clarity adds 3217ms and costs ~€17/month
  • Unattributable adds 3171ms and costs ~€17/month
  • www.rarebeauty.com adds 1896ms and costs ~€10/month
  • www.rarebeauty.com adds 831ms and costs ~€4/month
  • assets.gorgias.chat adds 633ms and costs ~€3/month
  • www.rarebeauty.com adds 601ms and costs ~€3/month
  • adds 529ms and costs ~€3/month
  • Google Tag Manager adds 502ms and costs ~€3/month
  • 90e271ce78bc.cdn4.forter.com adds 477ms and costs ~€3/month
  • Google Tag Manager adds 426ms and costs ~€2/month
  • 7ce243a1e1a2.cdn4.forter.com adds 407ms and costs ~€2/month
  • www.rarebeauty.com adds 286ms and costs ~€2/month
  • cookie-cdn.cookiepro.com adds 285ms and costs ~€2/month
  • www.rarebeauty.com adds 278ms and costs ~€1/month
  • Google Tag Manager adds 275ms and costs ~€1/month
  • static.rechargecdn.com adds 255ms and costs ~€1/month
  • Google Tag Manager adds 203ms 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

Microsoft Clarity takes 3217ms 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 3171ms 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.rarebeauty.com takes 1896ms 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.rarebeauty.com takes 831ms 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.gorgias.chat takes 633ms 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.rarebeauty.com takes 601ms 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

takes 529ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Google Tag Manager takes 502ms 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

90e271ce78bc.cdn4.forter.com takes 477ms 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 426ms 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 407ms 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.rarebeauty.com takes 286ms 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

cookie-cdn.cookiepro.com takes 285ms 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

51% of cookie-cdn.cookiepro.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

www.rarebeauty.com takes 278ms 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 275ms 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

static.rechargecdn.com takes 255ms 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

63% of static.rechargecdn.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 203ms 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.attn.tv'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

68% of ajax.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

54% of cdn.9gtb.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

70% of gdprcdn.b-cdn.net'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

91% of jsDelivr'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

73% 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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