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https://levi.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
3
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
73
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
88
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.

3.41 s

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

3.82 s

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

247 ms

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.

3.41 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.

4.22 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
17
10 PASS 2 REVIEW 3 FIX
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 (350.9 KiB of 351.7 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4184ms total JS execution
FIX
4184ms total JS execution
Warning::
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiX...: 1789ms CPU time
Warning::
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiX...: 1678ms CPU time
Warning::
Unattributable: 646ms CPU time
Info::
https://www.levi.com/NL/nl_NL/: 71ms CPU time
Warning::
Third-party scripts: 4184ms (100% of total)

Main Thread Breakdown

Script Evaluation 79% Other 11% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?v=1fa86f34-8157-0355-0b1a-e2a4816c0210&t=7975494791789ms1608ms129ms3rd
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0B1678ms1380ms121ms3rd
Unattributable646ms316ms0ms3rd
https://www.levi.com/NL/nl_NL/71ms9ms2ms3rd
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
JS Bundles
4 scripts, 70 KB unused
REVIEW
4 scripts, 70 KB unused
Warning::
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiX...: 37 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiX...: 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.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0B178 KB37 KB (21%)✓3rd
https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?v=1fa86f34-8157-0355-0b1a-e2a4816c0210&t=797549479161 KB33 KB (21%)✓3rd
blob:https://www.levi.com/15e3f6d9-62ad-4fc1-8215-e25b0b3ac7fe0 KB—✓3rd
blob:https://www.levi.com/3f2db064-a182-4253-ae1d-16d0d76ca9810 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
352 KB transferred, 13 requests
PASS
352 KB transferred, 13 requests
Info::
Page weighs 1010 KB (352 KB transferred)
Info::
13 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
352 KB / 2.4 MB budget
352 KB transferred
13 requests
0.07 g CO2 per page load
JavaScript 338.6 KiB 96%
HTML 7.0 KiB 2%
Other 3.2 KiB 1%
Other 2.8 KiB 1%
0 2.4 MB 4.9 MB
Under budget
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
Page Weight Inventory
13 resources · 352 KB · 70 KB savings available
PASS
13 resources · 352 KB · 70 KB savings available
Info::
Within 1MB page-weight target
Got: 352 KB
Info::
~70 KB of savings available
Warning::
11 third-party resources (100% of weight)
13 resources · 351.7 KiB · 11 third-party Within 1MB page-weight target
JavaScript 96% · 338.6 KiB
Document 2% · 7.0 KiB
Other 1% · 4.0 KiB
Image 1% · 2.0 KiB

~70.3 KiB of savings available

Remove unused JavaScript: 70.3 KiB
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
13 requests over 3663ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.4 s LCP 3.8 shttps://levi.com// https://levi.com/ — 301 — 278 B — 28 ms — h2https://levi.com/NL/nl_NL//NL/nl_NL/ https://levi.com/NL/nl_NL/ — 301 — 539 B — 6 ms — h2https://www.levi.com/NL/nl_NL/www.levi.com/NL/nl_NL/ https://www.levi.com/NL/nl_NL/ — 200 — 5.1 KiB — 82 ms — h2https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?v=1fa86f34-8157-0355-0b1a-e2a4816c0210&t=797549479www.levi.com/48wc9/g/Rw/do-q/UdaN1S... https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?v=1fa86f34-8157-0355-0b1a-e2a4816c0210&t=797549479 — 200 — 160.8 KiB — 25 ms — h2https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0Bwww.levi.com/48wc9/g/Rw/do-q/UdaN1S... https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0B — 200 — 177.8 KiB — 29 ms — h2https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0Bwww.levi.com/48wc9/g/Rw/do-q/UdaN1S... https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0B — 201 — 1.1 KiB — 192 ms — h2https://www.levi.com/favicon.icowww.levi.com/favicon.ico https://www.levi.com/favicon.ico — 200 — 2.0 KiB — 19 ms — h2blob:https://www.levi.com/15e3f6d9-62ad-4fc1-8215-e25b0b3ac7fewww.levi.com/15e3f6d9-62ad-4fc1-821... blob:https://www.levi.com/15e3f6d9-62ad-4fc1-8215-e25b0b3ac7fe — -1 — 0 B — 0 ms — blob:https://www.levi.com/3f2db064-a182-4253-ae1d-16d0d76ca981www.levi.com/3f2db064-a182-4253-ae1... blob:https://www.levi.com/3f2db064-a182-4253-ae1d-16d0d76ca981 — -1 — 0 B — 0 ms — https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0Bwww.levi.com/48wc9/g/Rw/do-q/UdaN1S... https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/YEiXVcJ59t1a4bmO5p/MHNfInI/SWF5E/nAlPw0B — 201 — 1.2 KiB — 176 ms — h2https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?t=797549479www.levi.com/48wc9/g/Rw/do-q/UdaN1S... https://www.levi.com/48wc9/g/Rw/do-q/UdaN1Sq3/thiXVcJ59t1a/QS1lInI/VBFPE/Rk4V3gPAg?t=797549479 — 200 — 877 B — 76 ms — h2https://www.levi.com/NL/nl_NL/www.levi.com/NL/nl_NL/ https://www.levi.com/NL/nl_NL/ — 403 — 1.9 KiB — 20 ms — h2https://www.levi.com/favicon.icowww.levi.com/favicon.ico https://www.levi.com/favicon.ico — 200 — 0 B — 4 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 4184ms · 164KB · $56/mo
www.levi.com
Other
Costly
Execution 1789ms
Transfer 161 KB
Unused 21%
Monthly Cost $24/mo
www.levi.com
Other
Costly
Execution 1678ms
Transfer 1 KB
Unused 21%
Monthly Cost $22/mo
Unattributable
Other
Costly
Execution 646ms
Transfer 0 KB
Monthly Cost $9/mo
www.levi.com
Other
Optional
Execution 71ms
Transfer 2 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.levi.com adds 1789ms and costs ~$24/month
  • www.levi.com adds 1678ms and costs ~$22/month
  • Unattributable adds 646ms and costs ~$9/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.levi.com takes 1789ms 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.levi.com takes 1678ms 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 646ms 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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