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https://www.wasabi.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
4
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
83
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
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.

750 ms

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

1.43 s

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

285 ms

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

0.040

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

1.35 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.

4.78 s

Page Load Progression

552 ms
1.1 s
1.7 s
2.2 s
2.8 s
3.3 s
3.9 s
4.4 s
Checks
14
5 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
4.1 MB transferred, 168 requests
FIX
4.1 MB transferred, 168 requests
Critical::
Page weighs 15.1 MB (4.1 MB transferred)
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Warning::
168 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.86 g CO2 per page load
4.1 MB / 2.4 MB budget
4.1 MB transferred
168 requests
0.86 g CO2 per page load
JavaScript 1.6 MiB 39%
Other 1.4 MiB 35%
Images 989.2 KiB 23%
HTML 55.5 KiB 1%
Fonts 34.8 KiB 1%
Other 8.4 KiB 0%
CSS 4.7 KiB 0%
Other 837 B 0%
Other 554 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

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

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 (4.1 MiB of 4.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
20 scripts, 654 KB unused
FIX
20 scripts, 654 KB unused
Warning::
https://wasabi.com/_next/static/chunks/pages/_app-...: 225 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PLB...: 76 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=DC-831...: 61 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-853...: 61 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 654 KB
654 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://wasabi.com/_next/static/chunks/pages/_app-8d0f6b178c065ffd.js551 KB225 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PLB3PMW180 KB76 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=G-JE5RX701S0&cx=c&gtm=4e6461h2178 KB69 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-8316818&cx=c&gtm=4e6461h2129 KB61 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-853928254&cx=c&gtm=4e6461h2144 KB61 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-9955201&cx=c&gtm=4e6461h2131 KB60 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-11367212055&cx=c&gtm=4e6461h2144 KB60 KB (42%)✓3rd
https://cdn.optimizely.com/js/5552864383205376.js96 KB43 KB (44%)✓3rd
https://wasabi.com/.netlify/scripts/rum4 KB—✓3rd
https://wasabi.com/_next/static/chunks/pages/index-1ab2ca1ac178127d.js3 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

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.

No Cache-Control header

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

B
Image Optimization
47 images, 0 KB saveable
REVIEW
47 images, 0 KB saveable
Info::
All images are well-optimized
47 images 989 KB
0 oversized -0 KB
15 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1910ms total JS execution
REVIEW
1910ms total JS execution
Warning::
https://wasabi.com/_next/static/chunks/pages/_app-...: 490ms CPU time
Warning::
https://wasabi.com/_next/static/chunks/framework-6...: 373ms CPU time
Warning::
Unattributable: 300ms CPU time
Warning::
https://wasabi.com/: 252ms CPU time
Info::
https://www.googletagmanager.com/gtag/destination?...: 111ms CPU time
Warning::
Third-party scripts: 1910ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 25% Style & Layout 10% Script Parsing & Compilation 7% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://wasabi.com/_next/static/chunks/pages/_app-8d0f6b178c065ffd.js490ms152ms65ms3rd
https://wasabi.com/_next/static/chunks/framework-63d16ff2f5e08230.js373ms340ms3ms3rd
Unattributable300ms14ms0ms3rd
https://wasabi.com/252ms3ms0ms3rd
https://www.googletagmanager.com/gtag/destination?id=G-JE5RX701S0&cx=c&gtm=4e6461h2111ms86ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PLB3PMW92ms72ms14ms3rd
https://wasabi.com/_next/static/chunks/main-b4f2ad0abb682109.js90ms85ms2ms3rd
https://cdn.optimizely.com/js/5552864383205376.js89ms74ms13ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-11367212055&cx=c&gtm=4e6461h259ms50ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-853928254&cx=c&gtm=4e6461h255ms46ms8ms3rd
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 (35 KB)
PASS
1 fonts (35 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

35 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 FCP 750 ms LCP 1.4 shttps://wasabi.com/_next/static/media/904be59b21bd51cb-s.p.woff2904be59b21bd51cb-s.p.woff2 https://wasabi.com/_next/static/media/904be59b21bd51cb-s.p.woff2 — 34.8 KiB — 0 ms — font-display: swap
904be59b21bd51cb-s.p.woff2 woff2 swap
Size 35 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
168 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
100% of JavaScript execution is third-party
First-party Third-party 1910ms · 1424KB · €33/mo
wasabi.com
Other
Costly
Execution 490ms
Transfer 551 KB
Unused 41%
Monthly Cost €8/mo
wasabi.com
Other
Costly
Execution 373ms
Transfer 43 KB
Monthly Cost €6/mo
Unattributable
Other
Costly
Execution 300ms
Transfer 0 KB
Monthly Cost €5/mo
wasabi.com
Other
Costly
Execution 252ms
Transfer 54 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 111ms
Transfer 178 KB
Unused 39%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 92ms
Transfer 180 KB
Unused 42%
Monthly Cost €2/mo
wasabi.com
Other
Optional
Execution 90ms
Transfer 32 KB
Monthly Cost €2/mo
Optimizely
A/B Testing
Optional
Execution 89ms
Transfer 96 KB
Unused 44%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 59ms
Transfer 144 KB
Unused 42%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 144 KB
Unused 42%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • wasabi.com adds 490ms and costs ~€8/month
  • wasabi.com adds 373ms and costs ~€6/month
  • Unattributable adds 300ms and costs ~€5/month
  • wasabi.com adds 252ms and costs ~€4/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

wasabi.com takes 490ms 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

wasabi.com takes 373ms 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 300ms 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

wasabi.com 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

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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