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https://www.adidas.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
87
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
80
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.

2.66 s

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

3.41 s

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

37 ms

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

0.017

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

2.66 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.

3.41 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
16
10 PASS 2 REVIEW 2 FIX
D
JS Execution Cost
Action
2772ms total JS execution
FIX
2772ms total JS execution
Warning::
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/k8aYk...: 1274ms CPU time
Warning::
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/VuaYk...: 961ms CPU time
Warning::
Unattributable: 383ms CPU time
Info::
https://www.adidas.com/: 154ms CPU time
Info::
Third-party scripts: 383ms (14% of total)

Main Thread Breakdown

Script Evaluation 77% Other 13% Style & Layout 4% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/k8aYkp3wED3r/BS8rDwE/XCU6/Ez4LaFxt?v=ef324881-a92b-73f5-6f83-c2f6c6a10211&t=794707451274ms1165ms51ms1st
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/VuaYkp3wED3rYVaabi/dzojDwE/YUYi/IBYTKUEB961ms768ms46ms1st
Unattributable383ms162ms0ms3rd
https://www.adidas.com/154ms38ms3ms1st
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: max-age=0, no-cache, no-store
Info::
ETag present — enables conditional (304) responses
Cache-Control

max-age=0, no-cache, no-store

DirectiveValueMeaning
max-age0Cache for 0 seconds
no-cache—Cache but always revalidate first
no-store—Never cache this response
B
JS Bundles
4 scripts, 70 KB unused
REVIEW
4 scripts, 70 KB unused
Warning::
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/VuaYk...: 36 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/k8aYk...: 33 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 70 KB
70 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/VuaYkp3wED3rYVaabi/dzojDwE/YUYi/IBYTKUEB171 KB36 KB (21%)✓1st
https://www.adidas.com/K5LhMx/Dm6/-8_/2jlatA/k8aYkp3wED3r/BS8rDwE/XCU6/Ez4LaFxt?v=ef324881-a92b-73f5-6f83-c2f6c6a10211&t=79470745162 KB33 KB (21%)✓1st
blob:https://www.adidas.com/ca1dd86b-4ddd-4482-bd22-19ccc25a68830 KB—✓3rd
blob:https://www.adidas.com/d4ba8515-945d-4edd-8500-7bd5d990d3dc0 KB—✓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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
462 KB transferred, 17 requests
PASS
462 KB transferred, 17 requests
Info::
Page weighs 1.1 MB (462 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
462 KB / 2.4 MB budget
462 KB transferred
17 requests
0.09 g CO2 per page load
JavaScript 333.2 KiB 72%
Fonts 104.8 KiB 23%
HTML 10.7 KiB 2%
Other 8.8 KiB 2%
Other 3.6 KiB 1%
CSS 1.2 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (105 KB)
PASS
3 fonts (105 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

105 KB total

Render-blocking

0

of 3

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 FCP 2.7 s LCP 3.4 shttps://www.adidas.com/WAFfailoverassets/fonts/adineuePROCyr-Regular.woffadineuePROCyr-Regular.woff https://www.adidas.com/WAFfailoverassets/fonts/adineuePROCyr-Regular.woff — 40.6 KiB — 0 ms — font-display: swaphttps://www.adidas.com/WAFfailoverassets/fonts/icomoon.wofficomoon.woff https://www.adidas.com/WAFfailoverassets/fonts/icomoon.woff — 15.1 KiB — 0 ms — font-display: swaphttps://www.adidas.com/WAFfailoverassets/fonts/adineuePROCyr-Bold.woffadineuePROCyr-Bold.woff https://www.adidas.com/WAFfailoverassets/fonts/adineuePROCyr-Bold.woff — 49.2 KiB — 0 ms — font-display: swap
adineuePROCyr-Regular.woff woff swap
Size 41 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
icomoon.woff woff swap
Size 15 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
adineuePROCyr-Bold.woff woff swap
Size 49 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
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 ~31 KB and ~62 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+
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
Network Waterfall
17 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
14% of JavaScript execution is third-party
First-party Third-party 383ms · 0KB · €4/mo
Unattributable
Other
Costly
Execution 383ms
Transfer 0 KB
Monthly Cost €4/mo

These scripts may cost more than they're worth

  • Unattributable adds 383ms and costs ~€4/month

Unattributable takes 383ms 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

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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