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https://uniqlo.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
6
REVIEW
2
PASS
5
INFO
2

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

45
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

1.68 s

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

2.14 s

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

1.39 s

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

0.000

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

5.03 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.

6.90 s

Page Load Progression

1.2 s
2.5 s
3.7 s
4.9 s
6.2 s
7.4 s
8.7 s
9.9 s
Checks
15
5 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
7.0 MB transferred, 93 requests
FIX
7.0 MB transferred, 93 requests
Critical::
Page weighs 16.2 MB (7.0 MB transferred)
Warning::
JavaScript is 2.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.7 MB
Info::
93 HTTP requests
Info::
Estimated 1.5 g CO2 per page load
7.0 MB / 2.4 MB budget
7.0 MB transferred
93 requests
1.5 g CO2 per page load
Other 3.6 MiB 52%
JavaScript 2.7 MiB 38%
HTML 223.1 KiB 3%
Images 218.7 KiB 3%
CSS 151.6 KiB 2%
Other 43.0 KiB 1%
Other 9.6 KiB 0%
Fonts 8.0 KiB 0%
Other 7.3 KiB 0%
Other 1.7 KiB 0%
Other 226 B 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

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 (7.0 MiB of 7.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5938ms total JS execution
FIX
5938ms total JS execution
Warning::
https://www.uniqlo.com/eu-at/elgnisolqinu.js?async...: 1380ms CPU time
Warning::
https://www.uniqlo.com/eu-at/en/navigation/vendors...: 769ms CPU time
Warning::
https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZ...: 597ms CPU time
Warning::
https://www.uniqlo.com/eu-at/en/navigation/main-e1...: 594ms CPU time
Warning::
https://www.uniqlo.com/eu-at/en/?showSelector=true...: 512ms CPU time
Warning::
Third-party scripts: 5938ms (100% of total)

Main Thread Breakdown

Script Evaluation 73% Other 9% Script Parsing & Compilation 9% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://www.uniqlo.com/eu-at/elgnisolqinu.js?async&seed=AADM882dAQAAAYDl5LWNG4AGKFlVgZHd5xH19I0C7JGfS3G_1V5KxeCaYjiW&x-i1ysm4mm--z=q1380ms1340ms12ms3rd
https://www.uniqlo.com/eu-at/en/navigation/vendors-5b38081b487b6e200b96.js769ms698ms36ms3rd
https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/VpX3DSafSaEQ/cEAYIi4B/AH4ZC2/lEAhQSAg?v=9e53d52c-748d-36f6-8b54-3350ff5f0210597ms533ms19ms3rd
https://www.uniqlo.com/eu-at/en/navigation/main-e175dd727dba3e3fed90.js594ms528ms51ms3rd
https://www.uniqlo.com/eu-at/en/?showSelector=true&customCountryFlag=NL512ms23ms136ms3rd
Unattributable476ms152ms0ms3rd
https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/OzX3DSkNcfppXL1k1c/SWMRIi4B/ATtxBU/4DEiwB340ms314ms22ms3rd
https://www.uniqlo.com/eu-at/en/navigation/react-00cf30119fa389e87994.js309ms213ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-GW5VJ7NFB0&cx=c&gtm=4e64m2163ms100ms24ms3rd
https://s.go-mpulse.net/boomerang/L7CDG-PWJGL-QJZ59-K92TE-SW8B8143ms66ms8ms3rd

Showing top 10 of 18 scripts

F
JS Bundles
Action
34 scripts, 1.2 MB unused
FIX
34 scripts, 1.2 MB unused
Warning::
https://www.uniqlo.com/eu-at/en/navigation/brand-g...: 229 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniqlo.com/eu-at/en/navigation/vendors...: 182 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniqlo.com/eu-at/en/navigation/shared-...: 165 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniqlo.com/eu-at/en/navigation/main-e1...: 140 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GW5V...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.2 MB
1250 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-a8180792c82a052fd357.js308 KB229 KB (75%)3rd
https://www.uniqlo.com/eu-at/en/navigation/vendors-5b38081b487b6e200b96.js227 KB182 KB (81%)3rd
https://www.uniqlo.com/eu-at/en/navigation/shared-global-ec-uikit-d67fb8250a063de9b0c5.js208 KB165 KB (80%)3rd
https://www.uniqlo.com/eu-at/en/navigation/main-e175dd727dba3e3fed90.js229 KB140 KB (61%)3rd
https://www.googletagmanager.com/gtag/js?id=G-GW5VJ7NFB0&cx=c&gtm=4e64m2172 KB69 KB (40%)3rd
https://www.googletagmanager.com/gtag/destination?id=AW-561454602&cx=c&gtm=4e64m2136 KB68 KB (50%)3rd
https://www.googletagmanager.com/gtag/destination?id=DC-10207248&cx=c&gtm=4e64m2129 KB65 KB (50%)3rd
https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js111 KB59 KB (54%)3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NBBZS2R180 KB53 KB (30%)3rd
https://www.googletagmanager.com/gtag/js?l=dataLayer&id=undefined84 KB53 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

F
Page Weight Inventory
Action
93 resources · 7.0 MB · 1.2 MB savings available
FIX
93 resources · 7.0 MB · 1.2 MB savings available
Warning::
Page weight 6.0 MB over 1MB target
Got: 7.0 MB Expected: ≤ 1 MB
Info::
~1.2 MB of savings available
Warning::
92 third-party resources (100% of weight)
Info::
7 resources over 200KB
93 resources · 7.0 MiB · 92 third-party 6.0 MiB over 1MB target
Media 52% · 3.6 MiB
JavaScript 38% · 2.7 MiB
Document 3% · 225.2 KiB
Image 3% · 220.9 KiB
CSS 2% · 155.9 KiB
Other 1% · 53.2 KiB
Font 0% · 8.0 KiB

~1.2 MiB of savings available

Remove unused JavaScript: 1.2 MiB
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.

No Cache-Control header

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

B
Image Optimization
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Info::
All images are well-optimized
14 images 219 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
1 fonts (8 KB)
PASS
1 fonts (8 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

8 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.7 s LCP 2.1 sdata:font/woff2;base64,d09GMgABAAAAAB/gAA8AAAAAT7QAAB+CAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP0ZGVE0cGh4b…gAA8AAAAAT7QAAB+CAAEAAA... data:font/woff2;base64,d09GMgABAAAAAB/gAA8AAAAAT7QAAB+CAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAP0ZGVE0cGh4b… — 8.0 KiB — 405 ms — font-display: swap
gAA8AAAAAT7QAAB+CAAEAAA... woff2 swap
Size 8 KB
Load time 405 ms
Start 1.2 s
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
93 requests over 9244ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 1.7 s LCP 2.1 shttps://uniqlo.com// https://uniqlo.com/ — 301 — 116 B — 683 ms — h2https://www.uniqlo.com/www.uniqlo.com/ https://www.uniqlo.com/ — 301 — 2.4 KiB — 121 ms — h2https://www.uniqlo.com/eu/en/home?customCountryFlag=NLwww.uniqlo.com/eu/en/home?customCou... https://www.uniqlo.com/eu/en/home?customCountryFlag=NL — 301 — 1.4 KiB — 54 ms — h2https://www.uniqlo.com/eu-at/en/?showSelector=true&customCountryFlag=NLwww.uniqlo.com/eu-at/en/?showSelect... https://www.uniqlo.com/eu-at/en/?showSelector=true&customCountryFlag=NL — 200 — 223.1 KiB — 185 ms — h2https://www.uniqlo.com/eu-at/elgnisolqinu.js?initwww.uniqlo.com/eu-at/elgnisolqinu.j... https://www.uniqlo.com/eu-at/elgnisolqinu.js?init — 200 — 8.5 KiB — 67 ms — h2https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-d168e58a4b427911e9e4.css — 200 — 119.4 KiB — 70 ms — h2https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-d168e58a4b427911e9e4.css — 200 — 18.2 KiB — 71 ms — h2https://www.uniqlo.com/eu-at/en/navigation/ec-components-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/ec-components-d168e58a4b427911e9e4.css — 200 — 13.9 KiB — 67 ms — h2https://asset.uniqlo.com/g/scripts/queueclient.min.jsasset.uniqlo.com/g/scripts/queuecli... https://asset.uniqlo.com/g/scripts/queueclient.min.js — 200 — 4.3 KiB — 34 ms — h2https://asset.uniqlo.com/g/scripts/queueconfigloader.min.jsasset.uniqlo.com/g/scripts/queuecon... https://asset.uniqlo.com/g/scripts/queueconfigloader.min.js — 200 — 6.3 KiB — 36 ms — h2https://im.uniqlo.com/global-cms/spa/resbf80884f9c8732120309e24c5805a81afr.jpgim.uniqlo.com/global-cms/spa/resbf8... https://im.uniqlo.com/global-cms/spa/resbf80884f9c8732120309e24c5805a81afr.jpg — 200 — 211.3 KiB — 45 ms — h2https://im.uniqlo.com/global-cms/spa/res5dd48562061caf6936099bcc04772644fr.pngim.uniqlo.com/global-cms/spa/res5dd... https://im.uniqlo.com/global-cms/spa/res5dd48562061caf6936099bcc04772644fr.png — 200 — 1.2 KiB — 46 ms — h2https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/OzX3DSkNcfppXL1k1c/SWMRIi4B/ATtxBU/4DEiwBwww.uniqlo.com/cM0snXE_W/oF/aV/Ks_1... https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/OzX3DSkNcfppXL1k1c/SWMRIi4B/ATtxBU/4DEiwB — 200 — 170.3 KiB — 29 ms — h2https://www.uniqlo.com/akam/13/2eafaa23www.uniqlo.com/akam/13/2eafaa23 https://www.uniqlo.com/akam/13/2eafaa23 — 200 — 9.4 KiB — 18 ms — h2https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-a8180792c82a052fd357.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-a8180792c82a052fd357.js — 200 — 308.2 KiB — 112 ms — h2https://s.go-mpulse.net/boomerang/L7CDG-PWJGL-QJZ59-K92TE-SW8B8s.go-mpulse.net/boomerang/L7CDG-PWJ... https://s.go-mpulse.net/boomerang/L7CDG-PWJGL-QJZ59-K92TE-SW8B8 — 200 — 60.0 KiB — 84 ms — h2https://www.uniqlo.com/eu-at/en/navigation/shared-global-ec-uikit-d67fb8250a063de9b0c5.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/shared-global-ec-uikit-d67fb8250a063de9b0c5.js — 200 — 207.6 KiB — 160 ms — h2https://www.uniqlo.com/eu-at/en/navigation/vendors-5b38081b487b6e200b96.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/vendors-5b38081b487b6e200b96.js — 200 — 226.7 KiB — 204 ms — h2https://www.uniqlo.com/eu-at/en/navigation/datadog-ea4552e953276276d855.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/datadog-ea4552e953276276d855.js — 200 — 56.3 KiB — 88 ms — h2https://www.uniqlo.com/eu-at/en/navigation/react-00cf30119fa389e87994.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/react-00cf30119fa389e87994.js — 200 — 65.6 KiB — 182 ms — h2https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-6b3e9ac1588943819163.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-6b3e9ac1588943819163.js — 200 — 34.3 KiB — 107 ms — h2https://www.uniqlo.com/eu-at/en/navigation/ec-components-db88987c253dcd5fe746.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/ec-components-db88987c253dcd5fe746.js — 200 — 54.3 KiB — 184 ms — h2https://www.uniqlo.com/eu-at/en/navigation/849-9864014fbf36a3bcffd8.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/849-9864014fbf36a3bcffd8.js — 200 — 101.9 KiB — 192 ms — h2https://www.uniqlo.com/eu-at/en/navigation/main-e175dd727dba3e3fed90.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/main-e175dd727dba3e3fed90.js — 200 — 229.2 KiB — 191 ms — h2https://www.uniqlo.com/eu-at/en/navigation/945-b2d07c0d051f3d90e925.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/945-b2d07c0d051f3d90e925.js — 200 — 4.5 KiB — 192 ms — h2https://www.uniqlo.com/eu-at/en/navigation/cms-e6f2ec1469e8ad1da922.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/cms-e6f2ec1469e8ad1da922.js — 200 — 9.6 KiB — 133 ms — h2https://www.uniqlo.com/eu-at/en/navigation/home-0b3233f70285f029ef74.jswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/home-0b3233f70285f029ef74.js — 200 — 5.4 KiB — 192 ms — h2https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/VpX3DSafSaEQ/cEAYIi4B/AH4ZC2/lEAhQSAg?v=9e53d52c-748d-36f6-8b54-3350ff5f0210www.uniqlo.com/cM0snXE_W/oF/aV/Ks_1... https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/VpX3DSafSaEQ/cEAYIi4B/AH4ZC2/lEAhQSAg?v=9e53d52c-748d-36f6-8b54-3350ff5f0210 — 200 — 155.5 KiB — 179 ms — h2https://www.uniqlo.com/eu-at/elgnisolqinu.js?async&seed=AADM882dAQAAAYDl5LWNG4AGKFlVgZHd5xH19I0C7JGfS3G_1V5KxeCaYjiW&x-i1ysm4mm--z=qwww.uniqlo.com/eu-at/elgnisolqinu.j... https://www.uniqlo.com/eu-at/elgnisolqinu.js?async&seed=AADM882dAQAAAYDl5LWNG4AGKFlVgZHd5xH19I0C7JGfS3G_1V5KxeCaYjiW&x-i1ysm4mm--z=q — 200 — 164.4 KiB — 194 ms — h2https://assets.queue-it.net/freu/integrationconfig/javascript/queueclientConfig.js?versionTimestamp=202604270802assets.queue-it.net/freu/integratio... https://assets.queue-it.net/freu/integrationconfig/javascript/queueclientConfig.js?versionTimestamp=202604270802 — 200 — 1.2 KiB — 45 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 1.7 s LCP 2.1 shttps://uniqlo.com// https://uniqlo.com/ — 301 — 116 B — 683 ms — h2https://www.uniqlo.com/www.uniqlo.com/ https://www.uniqlo.com/ — 301 — 2.4 KiB — 121 ms — h2https://www.uniqlo.com/eu/en/home?customCountryFlag=NLwww.uniqlo.com/eu/en/home?customCou... https://www.uniqlo.com/eu/en/home?customCountryFlag=NL — 301 — 1.4 KiB — 54 ms — h2https://www.uniqlo.com/eu-at/en/?showSelector=true&customCountryFlag=NLwww.uniqlo.com/eu-at/en/?showSelect... https://www.uniqlo.com/eu-at/en/?showSelector=true&customCountryFlag=NL — 200 — 223.1 KiB — 185 ms — h2https://www.uniqlo.com/eu-at/elgnisolqinu.js?initwww.uniqlo.com/eu-at/elgnisolqinu.j... https://www.uniqlo.com/eu-at/elgnisolqinu.js?init — 200 — 8.5 KiB — 67 ms — h2https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/brand-global-ec-uikit-d168e58a4b427911e9e4.css — 200 — 119.4 KiB — 70 ms — h2https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/fr-ito-web-react-d168e58a4b427911e9e4.css — 200 — 18.2 KiB — 71 ms — h2https://www.uniqlo.com/eu-at/en/navigation/ec-components-d168e58a4b427911e9e4.csswww.uniqlo.com/eu-at/en/navigation/... https://www.uniqlo.com/eu-at/en/navigation/ec-components-d168e58a4b427911e9e4.css — 200 — 13.9 KiB — 67 ms — h2https://asset.uniqlo.com/g/scripts/queueclient.min.jsasset.uniqlo.com/g/scripts/queuecli... https://asset.uniqlo.com/g/scripts/queueclient.min.js — 200 — 4.3 KiB — 34 ms — h2https://asset.uniqlo.com/g/scripts/queueconfigloader.min.jsasset.uniqlo.com/g/scripts/queuecon... https://asset.uniqlo.com/g/scripts/queueconfigloader.min.js — 200 — 6.3 KiB — 36 ms — 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h2https://c.riskified.com/v2/client_infosc.riskified.com/v2/client_infos https://c.riskified.com/v2/client_infos — 201 — 338 B — 101 ms — h2https://trial-eum-clientnsv4-s.akamaihd.net/eum/getdns.txt?c=pcnl61jkhtrial-eum-clientnsv4-s.akamaihd.net... https://trial-eum-clientnsv4-s.akamaihd.net/eum/getdns.txt?c=pcnl61jkh — 302 — 266 B — 27 ms — http/1.1https://trial-eum-clienttons-s.akamaihd.net/eum/getdns.txt?c=pcnl61jkhtrial-eum-clienttons-s.akamaihd.net... https://trial-eum-clienttons-s.akamaihd.net/eum/getdns.txt?c=pcnl61jkh — 302 — 278 B — 34 ms — http/1.1https://auecfsax2f6222ppdjsa-pcnl61-94b5f7117-clientnsv4-s.akamaihd.net/eum/results.txtauecfsax2f6222ppdjsa-pcnl61-94b5f71... https://auecfsax2f6222ppdjsa-pcnl61-94b5f7117-clientnsv4-s.akamaihd.net/eum/results.txt — 200 — 312 B — 35 ms — http/1.1https://fibzbqaacual4kqce3ybdaaaofu66gte-pcnl61-4b4bdc228-clienttons-s.akamaihd.net/eum/results.txtfibzbqaacual4kqce3ybdaaaofu66gte-pc... https://fibzbqaacual4kqce3ybdaaaofu66gte-pcnl61-4b4bdc228-clienttons-s.akamaihd.net/eum/results.txt — 200 — 312 B — 43 ms — http/1.1https://02179914.akstat.io/02179914.akstat.io/ https://02179914.akstat.io/ — 204 — 226 B — 182 ms — h2https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/VpX3DSafSaEQ/cEAYIi4B/AH4ZC2/lEAhQSAgwww.uniqlo.com/cM0snXE_W/oF/aV/Ks_1... https://www.uniqlo.com/cM0snXE_W/oF/aV/Ks_13NJbyuZI0M/VpX3DSafSaEQ/cEAYIi4B/AH4ZC2/lEAhQSAg — 200 — 1.0 KiB — 85 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 5938ms · 2245KB · €31/mo
www.uniqlo.com
Other
Costly
Execution 1380ms
Transfer 164 KB
Monthly Cost €7/mo
www.uniqlo.com
Other
Costly
Execution 769ms
Transfer 227 KB
Unused 81%
Monthly Cost €4/mo
www.uniqlo.com
Other
Costly
Execution 597ms
Transfer 155 KB
Unused 21%
Monthly Cost €3/mo
www.uniqlo.com
Other
Costly
Execution 594ms
Transfer 229 KB
Unused 61%
Monthly Cost €3/mo
www.uniqlo.com
Other
Costly
Execution 512ms
Transfer 223 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 476ms
Transfer 0 KB
Monthly Cost €3/mo
www.uniqlo.com
Other
Costly
Execution 340ms
Transfer 1 KB
Unused 21%
Monthly Cost €2/mo
www.uniqlo.com
Other
Costly
Execution 309ms
Transfer 66 KB
Unused 31%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 163ms
Transfer 172 KB
Unused 40%
Monthly Cost €1/mo
s.go-mpulse.net
Other
Optional
Execution 143ms
Transfer 60 KB
Unused 38%
Monthly Cost €1/mo
OneTrust
Consent
Essential
Execution 133ms
Transfer 111 KB
Unused 54%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 130ms
Transfer 129 KB
Unused 50%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 100ms
Transfer 180 KB
Unused 30%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 65ms
Transfer 136 KB
Unused 50%
Monthly Cost €0/mo
www.uniqlo.com
Other
Optional
Execution 62ms
Transfer 9 KB
Monthly Cost €0/mo
beacon.riskified.com
Other
Optional
Execution 59ms
Transfer 18 KB
Monthly Cost €0/mo
www.uniqlo.com
Other
Optional
Execution 55ms
Transfer 308 KB
Unused 75%
Monthly Cost €0/mo
www.uniqlo.com
Other
Optional
Execution 50ms
Transfer 56 KB
Unused 61%
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.uniqlo.com adds 1380ms and costs ~€7/month
  • www.uniqlo.com adds 769ms and costs ~€4/month
  • www.uniqlo.com adds 597ms and costs ~€3/month
  • www.uniqlo.com adds 594ms and costs ~€3/month
  • www.uniqlo.com adds 512ms and costs ~€3/month
  • Unattributable adds 476ms and costs ~€3/month
  • www.uniqlo.com adds 340ms and costs ~€2/month
  • www.uniqlo.com adds 309ms and costs ~€2/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

www.uniqlo.com takes 1380ms 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.uniqlo.com takes 769ms 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

81% of www.uniqlo.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.uniqlo.com takes 597ms 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.uniqlo.com takes 594ms 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

61% of www.uniqlo.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.uniqlo.com takes 512ms 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 476ms 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.uniqlo.com takes 340ms 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.uniqlo.com takes 309ms 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

54% of OneTrust'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

50% 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

75% of www.uniqlo.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

61% of www.uniqlo.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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