Skip to content
https://kyliecosmetics.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
1
PASS
7
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.

732 ms

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

1.29 s

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

620 ms

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

1.962

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

5.61 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.

9.38 s

Page Load Progression

1.0 s
2.1 s
3.1 s
4.2 s
5.2 s
6.2 s
7.3 s
8.3 s
Checks
14
7 PASS 1 REVIEW 4 FIX
F
Page Weight Budget
Action
27.1 MB transferred, 495 requests
FIX
27.1 MB transferred, 495 requests
Critical::
Page weighs 51.7 MB (27.1 MB transferred)
Warning::
JavaScript is 4.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.9 MB
Warning::
Images are 3.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.0 MB
Warning::
495 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.7 g CO2 per page load
27.1 MB / 2.4 MB budget
27.1 MB transferred
495 requests
5.7 g CO2 per page load
Other 17.3 MiB 64%
JavaScript 4.9 MiB 18%
Images 3.0 MiB 11%
Other 1000.1 KiB 4%
Other 319.3 KiB 1%
Other 183.4 KiB 1%
CSS 180.3 KiB 1%
Fonts 127.3 KiB 0%
Other 120.7 KiB 0%
HTML 84.6 KiB 0%
Other 14.3 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

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

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
4671ms total JS execution
FIX
4671ms total JS execution
Warning::
https://kyliecosmetics.com/cdn/shop/t/1968/assets/...: 1112ms CPU time
Warning::
Unattributable: 796ms CPU time
Warning::
https://kyliecosmetics.com/cdn/shop/t/1968/assets/...: 418ms CPU time
Warning::
https://kyliecosmetics.com/en-bl: 323ms CPU time
Info::
https://asset.fwcdn3.com/js/fwn.js: 235ms CPU time
Info::
Third-party scripts: 1995ms (43% of total)

Main Thread Breakdown

Script Evaluation 61% Other 20% Style & Layout 6% Script Parsing & Compilation 5% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
https://kyliecosmetics.com/cdn/shop/t/1968/assets/template.index.js?v=1689971518381448688317748699621112ms898ms1ms1st
Unattributable796ms40ms0ms3rd
https://kyliecosmetics.com/cdn/shop/t/1968/assets/klaviyo-cart-browse-abandonment-script.js?v=176092662415477941961774869962418ms328ms0ms1st
https://kyliecosmetics.com/en-bl323ms58ms11ms1st
https://asset.fwcdn3.com/js/fwn.js235ms202ms8ms3rd
https://kyliecosmetics.com/cdn/shop/t/1968/assets/layout.theme-2162c466.js?v=34817878541468963321774869962200ms164ms0ms1st
https://kyliecosmetics.com/cdn/shopifycloud/storefront/assets/storefront/load_feature-496de5fe.js189ms144ms0ms1st
https://kyliecosmetics.com/cdn/shop/t/1968/assets/vendors-a52089c6.js?v=164166408320432806271774869962178ms128ms4ms1st
https://kyliecosmetics.com/cdn/shop/t/1968/assets/vendors-d2eb5610.js?v=127382237684006138891774869962143ms44ms2ms1st
https://asset.fwcdn3.com/js/chunks/fwn/48740-edef531241aca99cdecb.js143ms122ms0ms3rd

Showing top 10 of 20 scripts

F
JS Bundles
Action
208 scripts, 1.8 MB unused
FIX
208 scripts, 1.8 MB unused
Warning::
https://cdn-swell-assets.yotpo.com/app.v1.0.368.js: 154 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/html2pdf.js...: 148 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://asset.fwscripts.com/js/live-helper.js: 114 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1...: 92 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://3fdbc400153f.cdn4.forter.com/sn/3fdbc40015...: 88 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.8 MB
1871 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn-swell-assets.yotpo.com/app.v1.0.368.js192 KB154 KB (80%)✓3rd
https://cdnjs.cloudflare.com/ajax/libs/html2pdf.js/0.10.1/html2pdf.bundle.min.js188 KB148 KB (79%)✓3rd
https://asset.fwscripts.com/js/live-helper.js194 KB114 KB (59%)✓3rd
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js220 KB92 KB (42%)✓3rd
https://3fdbc400153f.cdn4.forter.com/sn/3fdbc400153f/script.js216 KB88 KB (41%)✓3rd
https://3fdbc400153f.cdn4.forter.com/sn/3fdbc400153f/script.js216 KB88 KB (41%)✓3rd
https://asset.fwcdn3.com/js/fwn.js?business_id=gwR8Yo119 KB76 KB (64%)✓3rd
https://static.rechargecdn.com/assets/js/widget.min.js?shop=kylie-jenner-us.myshopify.com119 KB75 KB (63%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HJXEVNV20J&cx=c&gtm=4e6461148 KB71 KB (48%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HJXEVNV20J&cx=c&gtm=4e6461148 KB71 KB (48%)✓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
Image Optimization
88 images, 0 KB saveable
REVIEW
88 images, 0 KB saveable
Info::
All images are well-optimized
88 images 3.0 MB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
A
Third-Party Impact
34% third-party, 0 ms blocking
PASS
34% third-party, 0 ms blocking
Info::
Third-party code accounts for 34% of page weight (9.3 MiB of 27.1 MiB)
Info::
Third-party blocking time is low (0 ms)
66%
34%
First-party Third-party
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
8 fonts (167 KB)
PASS
8 fonts (167 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

167 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 732 ms LCP 1.3 shttps://kyliecosmetics.com/cdn/shop/t/1968/assets/universltstd-boldcn-webfont.woff2?v=112365896829129518631774869962universltstd-boldcn-web... https://kyliecosmetics.com/cdn/shop/t/1968/assets/universltstd-boldcn-webfont.woff2?v=112365896829129518631774869962 — 21.5 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://kyliecosmetics.com/cdn/shop/t/1968/assets/tt_chocolates_regular-webfont.woff2?v=21416170975998103091774869962tt_chocolates_regular-w... https://kyliecosmetics.com/cdn/shop/t/1968/assets/tt_chocolates_regular-webfont.woff2?v=21416170975998103091774869962 — 18.8 KiB — 0 ms — font-display: swaphttps://kyliecosmetics.com/cdn/shop/t/1968/assets/tt_chocolates_demibold-webfont.woff2?v=23781290936394902461774869962tt_chocolates_demibold-... https://kyliecosmetics.com/cdn/shop/t/1968/assets/tt_chocolates_demibold-webfont.woff2?v=23781290936394902461774869962 — 19.1 KiB — 0 ms — font-display: swapdata:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA… — 1.6 KiB — 0 ms — font-display: swapdata:application/x-font-ttf;charset=utf-8;base64,AAEAAAALAIAAAwAwT1MvMg9jDTEAAAC8AAAAYGNtYXDi9bSBAA…x-font-ttf;charset=utf-... data:application/x-font-ttf;charset=utf-8;base64,AAEAAAALAIAAAwAwT1MvMg9jDTEAAAC8AAAAYGNtYXDi9bSBAA… — 3.0 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0662/4598/4498/files/tt_chocolates_regular-webfont.woff2?v=1679588177tt_chocolates_regular-w... https://cdn.shopify.com/s/files/1/0662/4598/4498/files/tt_chocolates_regular-webfont.woff2?v=1679588177 — 18.6 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0662/4598/4498/files/universltstd-boldcn-webfont.woff2?v=1679588177universltstd-boldcn-web... https://cdn.shopify.com/s/files/1/0662/4598/4498/files/universltstd-boldcn-webfont.woff2?v=1679588177 — 21.5 KiB — 0 ms — font-display: swap
universltstd-boldcn-web... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
tt_chocolates_regular-w... woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
tt_chocolates_demibold-... woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
font-woff;charset=utf-8... woff swap
Size 2 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
x-font-ttf;charset=utf-... unknown swap
Size 3 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
tt_chocolates_regular-w... woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
universltstd-boldcn-web... woff2 swap
Size 21 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 ~1 KB and ~2 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
495 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
43% of JavaScript execution is third-party
First-party Third-party 1995ms · 1547KB · €11/mo
Unattributable
Other
Costly
Execution 796ms
Transfer 0 KB
Monthly Cost €4/mo
asset.fwcdn3.com
Other
Costly
Execution 235ms
Transfer 119 KB
Unused 28%
Monthly Cost €1/mo
asset.fwcdn3.com
Other
Optional
Execution 143ms
Transfer 1 KB
Monthly Cost €1/mo
(program):2
Other
Optional
Execution 140ms
Transfer 0 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 122ms
Transfer 189 KB
Unused 29%
Monthly Cost €1/mo
3fdbc400153f.cdn4.forter.com
Other
Optional
Execution 103ms
Transfer 216 KB
Unused 41%
Monthly Cost €1/mo
Optimizely
A/B Testing
Optional
Execution 100ms
Transfer 93 KB
Unused 49%
Monthly Cost €1/mo
7ce243a1e1a2.cdn4.forter.com
Other
Optional
Execution 93ms
Transfer 220 KB
Unused 42%
Monthly Cost €0/mo
cdn-swell-assets.yotpo.com
Other
Optional
Execution 84ms
Transfer 192 KB
Unused 80%
Monthly Cost €0/mo
asset.fwscripts.com
Other
Optional
Execution 69ms
Transfer 194 KB
Unused 59%
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 166 KB
Unused 42%
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 54ms
Transfer 157 KB
Unused 40%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 796ms and costs ~€4/month
  • asset.fwcdn3.com adds 235ms and costs ~€1/month

43% 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 796ms 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

asset.fwcdn3.com takes 235ms 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

80% of cdn-swell-assets.yotpo.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

59% of asset.fwscripts.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.

Send Feedback