Performance
· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
922 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.30 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
105 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.036
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.80 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.
9.62 s
Page Load Progression
2.3 s
4.6 s
6.9 s
9.2 s
11.4 s
13.7 s
16.0 s
18.3 sFPage Weight BudgetAction43.1 MB transferred, 526 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
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.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction11004ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://scripts.clarity.ms/0.8.59/clarity.js | 4809ms | 1326ms | 2ms | 3rd |
| https://www.rarebeauty.com/ | 1683ms | 43ms | 7ms | 3rd |
| Unattributable | 1503ms | 108ms | 0ms | 3rd |
| webpack:///./src/js/lib/ugc.js? | 598ms | 461ms | 0ms | 3rd |
| https://90e271ce78bc.cdn4.forter.com/sn/90e271ce78bc/script.js | 347ms | 322ms | 10ms | 3rd |
| https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js | 275ms | 248ms | 11ms | 3rd |
| https://www.rarebeauty.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js | 265ms | 209ms | 4ms | 3rd |
| webpack:///./node_modules/lazysizes/lazysizes.js? | 239ms | 222ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MMKQH7Z | 173ms | 147ms | 13ms | 3rd |
| https://assets.gorgias.chat/build/static/js/279.6ba6eb825556cdb4.js | 159ms | 90ms | 5ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction196 scripts, 1.8 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.jsdelivr.net/npm/hls.js@latest | 159 KB | 145 KB (91%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-33CGHVY44Y&cx=c>m=4e6461 | 172 KB | 111 KB (65%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-33CGHVY44Y&cx=c>m=4e6461 | 172 KB | 111 KB (65%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-357011569&cx=c>m=4e6461 | 144 KB | 105 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-357011569&cx=c>m=4e6461 | 144 KB | 105 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=GT-K5MK2GR&cx=c>m=4e6461 | 136 KB | 105 KB (77%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=GT-WPQVGCX&cx=c>m=4e6461 | 136 KB | 105 KB (77%) | ✓ | 3rd |
| https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js | 220 KB | 92 KB (42%) | ✓ | 3rd |
| https://90e271ce78bc.cdn4.forter.com/sn/90e271ce78bc/script.js | 218 KB | 89 KB (41%) | ✓ | 3rd |
| https://static.rechargecdn.com/assets/js/widget.min.js?shop=therarebeauty.myshopify.com | 119 KB | 75 KB (63%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
DHTTP CachingActionno-store (uncacheable)FIX
private, no-store
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-store | — | Never cache this response |
CImage OptimizationAction62 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Performance issues directly impact user engagement and conversion rates.
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (224 KB)PASS
Web fonts
7
224 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall526 requests over 0msINFO
Performance analysis not available for this result.
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Microsoft Clarity scripts.clarity.ms | Session Replay | 4809ms | 26 KB | — | €25/mo | Costly |
www.rarebeauty.com www.rarebeauty.com | Other | 1683ms | 37 KB | — | €9/mo | Costly |
Unattributable Unattributable | Other | 1503ms | 0 KB | — | €8/mo | Costly |
| Other | 598ms | 0 KB | — | €3/mo | Costly | |
90e271ce78bc.cdn4.forter.com 90e271ce78bc.cdn4.forter.com | Other | 347ms | 218 KB | 41% | €2/mo | Costly |
7ce243a1e1a2.cdn4.forter.com 7ce243a1e1a2.cdn4.forter.com | Other | 275ms | 220 KB | 42% | €1/mo | Costly |
www.rarebeauty.com www.rarebeauty.com | Other | 265ms | 61 KB | 39% | €1/mo | Costly |
| Other | 239ms | 0 KB | — | €1/mo | Costly | |
Google Tag Manager www.googletagmanager.com | Tag Manager | 173ms | 166 KB | 41% | €1/mo | Optional |
assets.gorgias.chat assets.gorgias.chat | Other | 159ms | 93 KB | 45% | €1/mo | Optional |
www.rarebeauty.com www.rarebeauty.com | Other | 129ms | 38 KB | — | €1/mo | Optional |
www.rarebeauty.com www.rarebeauty.com | Other | 114ms | 148 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 105ms | 144 KB | 38% | €1/mo | Optional |
static.rechargecdn.com static.rechargecdn.com | Other | 104ms | 119 KB | 63% | €1/mo | Optional |
cookie-cdn.cookiepro.com cookie-cdn.cookiepro.com | Other | 93ms | 98 KB | 51% | €0/mo | Optional |
www.rarebeauty.com www.rarebeauty.com | Other | 85ms | 4 KB | — | €0/mo | Optional |
www.rarebeauty.com www.rarebeauty.com | Other | 74ms | 28 KB | — | €0/mo | Optional |
crossborder-integration.global-e.com crossborder-integration.global-e.com | Other | 74ms | 23 KB | — | €0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 72ms | 172 KB | 39% | €0/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 54ms | 42 KB | — | €0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 136 KB | 47% | €0/mo | Optional |
These scripts may cost more than they're worth
- Microsoft Clarity adds 4809ms and costs ~€25/month
- www.rarebeauty.com adds 1683ms and costs ~€9/month
- Unattributable adds 1503ms and costs ~€8/month
- adds 598ms and costs ~€3/month
- 90e271ce78bc.cdn4.forter.com adds 347ms and costs ~€2/month
- 7ce243a1e1a2.cdn4.forter.com adds 275ms and costs ~€1/month
- www.rarebeauty.com adds 265ms and costs ~€1/month
- adds 239ms and costs ~€1/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 4809ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.rarebeauty.com takes 1683ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 1503ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
takes 598ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Performance issues directly impact user engagement and conversion rates.
90e271ce78bc.cdn4.forter.com takes 347ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
7ce243a1e1a2.cdn4.forter.com takes 275ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.rarebeauty.com takes 265ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
takes 239ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Performance issues directly impact user engagement and conversion rates.
63% of static.rechargecdn.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
51% of cookie-cdn.cookiepro.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev