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https://kyliecosmetics.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
1
PASS
9
INFO
2

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

Mobile Desktop
16
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
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.
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.

2.25 s

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

4.72 s

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

5.77 s

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

1.004

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

19.41 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.

57.45 s

Page Load Progression

1.1 s
2.2 s
3.3 s
4.3 s
5.4 s
6.5 s
7.6 s
8.7 s
Checks
16
9 PASS 1 REVIEW 4 FIX
F
Page Weight Budget
Action
26.8 MB transferred, 487 requests
FIX
26.8 MB transferred, 487 requests
Critical::
Page weighs 51.4 MB (26.8 MB transferred)
Warning::
JavaScript is 4.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.8 MB
Warning::
Images are 2.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.7 MB
Warning::
487 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.6 g CO2 per page load
26.8 MB / 2.4 MB budget
26.8 MB transferred
487 requests
5.6 g CO2 per page load
Other 17.3 MiB 64%
JavaScript 4.8 MiB 18%
Images 2.7 MiB 10%
Other 998.8 KiB 4%
Other 319.2 KiB 1%
Other 182.2 KiB 1%
CSS 180.3 KiB 1%
Fonts 122.7 KiB 0%
Other 120.7 KiB 0%
HTML 84.8 KiB 0%
Other 14.4 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
22989ms total JS execution
FIX
22989ms total JS execution
Warning::
Unattributable: 3550ms CPU time
Warning::
https://kyliecosmetics.com/cdn/shop/t/1968/assets/...: 3309ms CPU time
Warning::
https://kyliecosmetics.com/cdn/shopifycloud/storef...: 2019ms CPU time
Warning::
https://kyliecosmetics.com/en-bl: 1737ms CPU time
Warning::
https://asset.fwcdn3.com/js/fwn.js: 1190ms CPU time
Warning::
Third-party scripts: 12210ms (53% of total)

Main Thread Breakdown

Script Evaluation 59% Other 22% Style & Layout 7% Script Parsing & Compilation 6% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
Unattributable3550ms246ms0ms3rd
https://kyliecosmetics.com/cdn/shop/t/1968/assets/template.index.js?v=1689971518381448688317748699623309ms2398ms2ms1st
https://kyliecosmetics.com/cdn/shopifycloud/storefront/assets/shop_events_listener-3da45d37.js2019ms1659ms1ms1st
https://kyliecosmetics.com/en-bl1737ms315ms47ms1st
https://asset.fwcdn3.com/js/fwn.js1190ms961ms31ms3rd
https://kyliecosmetics.com/cdn/shop/t/1968/assets/layout.theme-2162c466.js?v=34817878541468963321774869962876ms744ms0ms1st
https://kyliecosmetics.com/cdn/shop/t/1968/assets/vendors-d2eb5610.js?v=127382237684006138891774869962723ms178ms5ms1st
https://cdn.optimizely.com/js/25764320766.js705ms513ms171ms3rd
(program):2670ms197ms0ms3rd
https://3fdbc400153f.cdn4.forter.com/sn/3fdbc400153f/script.js625ms490ms60ms3rd

Showing top 10 of 41 scripts

F
JS Bundles
Action
207 scripts, 1.8 MB unused
FIX
207 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
1868 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/destination?id=AW-741669020&cx=c&gtm=4e6461144 KB70 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HJXEVNV20J&cx=c&gtm=4e6461148 KB70 KB (47%)✓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
90 images, 0 KB saveable
REVIEW
90 images, 0 KB saveable
Info::
All images are well-optimized
90 images 2.7 MB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
A
Third-Party Impact
35% third-party, 0 ms blocking
PASS
35% third-party, 0 ms blocking
Info::
Third-party code accounts for 35% of page weight (9.4 MiB of 26.8 MiB)
Info::
Third-party blocking time is low (0 ms)
65%
35%
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
6 fonts (163 KB)
PASS
6 fonts (163 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

163 KB total

Render-blocking

0

of 6

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 FCP 2.2 s LCP 4.7 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: 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 — 18.7 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
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 22 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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
Page uses 8 resource hint(s)

Current Resource Hints

preconnect
6
preload
—
dns-prefetch
2
prefetch
—

8 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
487 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
53% of JavaScript execution is third-party
First-party Third-party 12210ms · 2896KB · €65/mo
Unattributable
Other
Costly
Execution 3550ms
Transfer 0 KB
Monthly Cost €19/mo
asset.fwcdn3.com
Other
Costly
Execution 1190ms
Transfer 119 KB
Unused 28%
Monthly Cost €6/mo
Optimizely
A/B Testing
Costly
Execution 705ms
Transfer 93 KB
Unused 49%
Monthly Cost €4/mo
(program):2
Other
Costly
Execution 670ms
Transfer 0 KB
Monthly Cost €4/mo
3fdbc400153f.cdn4.forter.com
Other
Costly
Execution 625ms
Transfer 216 KB
Unused 41%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 580ms
Transfer 189 KB
Unused 29%
Monthly Cost €3/mo
asset.fwcdn3.com
Other
Costly
Execution 578ms
Transfer 1 KB
Monthly Cost €3/mo
asset.fwscripts.com
Other
Costly
Execution 479ms
Transfer 194 KB
Unused 59%
Monthly Cost €3/mo
7ce243a1e1a2.cdn4.forter.com
Other
Costly
Execution 413ms
Transfer 220 KB
Unused 42%
Monthly Cost €2/mo
cdn-swell-assets.yotpo.com
Other
Costly
Execution 376ms
Transfer 192 KB
Unused 80%
Monthly Cost €2/mo
cdnjs
CDN
Costly
Execution 304ms
Transfer 188 KB
Unused 79%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 274ms
Transfer 166 KB
Unused 42%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Costly
Execution 252ms
Transfer 143 KB
Unused 43%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Costly
Execution 239ms
Transfer 157 KB
Unused 40%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 190ms
Transfer 131 KB
Unused 44%
Monthly Cost €1/mo
cdn-widgetsrepository.yotpo.com
Other
Optional
Execution 189ms
Transfer 64 KB
Monthly Cost €1/mo
goihs.kyliecosmetics.com
Other
Optional
Execution 188ms
Transfer 48 KB
Unused 56%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 174ms
Transfer 148 KB
Unused 47%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 171ms
Transfer 144 KB
Unused 49%
Monthly Cost €1/mo
static.rechargecdn.com
Other
Optional
Execution 170ms
Transfer 119 KB
Unused 63%
Monthly Cost €1/mo
foursixty.com
Other
Optional
Execution 154ms
Transfer 30 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 152ms
Transfer 129 KB
Unused 48%
Monthly Cost €1/mo
asset.fwcdn3.com
Other
Optional
Execution 125ms
Transfer 119 KB
Unused 64%
Monthly Cost €1/mo
apps.bazaarvoice.com
Other
Optional
Execution 124ms
Transfer 28 KB
Monthly Cost €1/mo
crossborder-integration.global-e.com
Other
Optional
Execution 113ms
Transfer 23 KB
Monthly Cost €1/mo
asset.fwcdn3.com
Other
Optional
Execution 94ms
Transfer 11 KB
Monthly Cost €0/mo
apps.bazaarvoice.com
Other
Optional
Execution 76ms
Transfer 11 KB
Monthly Cost €0/mo
apps.bazaarvoice.com
Other
Optional
Execution 55ms
Transfer 14 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 3550ms and costs ~€19/month
  • asset.fwcdn3.com adds 1190ms and costs ~€6/month
  • Optimizely adds 705ms and costs ~€4/month
  • (program):2 adds 670ms and costs ~€4/month
  • 3fdbc400153f.cdn4.forter.com adds 625ms and costs ~€3/month
  • Google Tag Manager adds 580ms and costs ~€3/month
  • asset.fwcdn3.com adds 578ms and costs ~€3/month
  • asset.fwscripts.com adds 479ms and costs ~€3/month
  • 7ce243a1e1a2.cdn4.forter.com adds 413ms and costs ~€2/month
  • cdn-swell-assets.yotpo.com adds 376ms and costs ~€2/month
  • cdnjs adds 304ms and costs ~€2/month
  • Google Tag Manager adds 274ms and costs ~€1/month
  • Google Tag Manager adds 252ms and costs ~€1/month
  • Google Tag Manager adds 239ms and costs ~€1/month

53% 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 3550ms 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 1190ms 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

Optimizely takes 705ms 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

(program):2 takes 670ms 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

3fdbc400153f.cdn4.forter.com takes 625ms 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 580ms 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 578ms 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.fwscripts.com takes 479ms 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 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

7ce243a1e1a2.cdn4.forter.com takes 413ms 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-swell-assets.yotpo.com takes 376ms 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

cdnjs takes 304ms 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

79% of cdnjs'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 274ms 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 252ms 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 239ms 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

56% of goihs.kyliecosmetics.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

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

64% of asset.fwcdn3.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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