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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
4
REVIEW
1
PASS
9
INFO
2

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

Mobile Desktop
41
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

3.20 s

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

11.40 s

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

1.11 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.

6.23 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.

11.55 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
9 PASS 1 REVIEW 4 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 82 requests
FIX
2.1 MB transferred, 82 requests
Info::
Page weighs 5.3 MB (2.1 MB transferred)
Warning::
JavaScript is 982 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 982 KB
Info::
82 HTTP requests
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
82 requests
0.44 g CO2 per page load
JavaScript 982.1 KiB 46%
Images 749.0 KiB 35%
Fonts 139.6 KiB 6%
Other 83.7 KiB 4%
CSS 81.9 KiB 4%
Other 66.2 KiB 3%
HTML 43.3 KiB 2%
Other 4.7 KiB 0%
Other 680 B 0%
Other 0 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

F
JS Execution Cost
Action
4346ms total JS execution
FIX
4346ms total JS execution
Warning::
https://www.scaleway.com/_next/static/chunks/0x-6o...: 1260ms CPU time
Warning::
https://www.scaleway.com/_next/static/chunks/turbo...: 1163ms CPU time
Warning::
https://www.scaleway.com/en/: 739ms CPU time
Warning::
Unattributable: 553ms CPU time
Warning::
https://www.scaleway.com/_next/static/chunks/turbo...: 366ms CPU time
Info::
Third-party scripts: 553ms (13% of total)

Main Thread Breakdown

Script Evaluation 53% Other 22% Style & Layout 10% Script Parsing & Compilation 9% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.scaleway.com/_next/static/chunks/0x-6o7o0.i.e2.js1260ms1006ms59ms1st
https://www.scaleway.com/_next/static/chunks/turbopack-0-_rp4p6-wb18.js1163ms924ms2ms1st
https://www.scaleway.com/en/739ms7ms1ms1st
Unattributable553ms67ms0ms3rd
https://www.scaleway.com/_next/static/chunks/turbopack-087~v1rr2-abx.js366ms363ms2ms1st
https://www.scaleway.com/_next/static/chunks/0apocp0s~0iy3.js142ms80ms59ms1st
https://www.scaleway.com/_next/static/chunks/0vosegp0~e-5h.js73ms2ms70ms1st
https://www.scaleway.com/_next/static/chunks/14p6u97z6tglr.js51ms1ms49ms1st
D
JS Bundles
Action
37 scripts, 490 KB unused
FIX
37 scripts, 490 KB unused
Warning::
https://www.scaleway.com/_next/static/chunks/0vose...: 144 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0eako...: 107 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/14p6u...: 103 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0x-6o...: 49 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0h7kk...: 43 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 490 KB
490 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.scaleway.com/_next/static/chunks/0vosegp0~e-5h.js192 KB144 KB (76%)✓1st
https://www.scaleway.com/_next/static/chunks/0eakoc57m6p9_.js131 KB107 KB (82%)✓1st
https://www.scaleway.com/_next/static/chunks/14p6u97z6tglr.js104 KB103 KB (100%)✓1st
https://www.scaleway.com/_next/static/chunks/0x-6o7o0.i.e2.js135 KB49 KB (37%)✓1st
https://www.scaleway.com/_next/static/chunks/0h7kkxfcsy964.js99 KB43 KB (45%)✓1st
https://www.scaleway.com/_next/static/chunks/0apocp0s~0iy3.js104 KB42 KB (41%)✓1st
https://www.scaleway.com/_next/static/chunks/turbopack-087~v1rr2-abx.js5 KB—✓1st
https://www.scaleway.com/_next/static/n2GeqsnIKrbyw3jZCuNBt/_clientMiddlewareManifest.js0 KB—✓1st
https://www.scaleway.com/_next/static/chunks/11cxbf2f1vyel.js17 KB—✓1st
https://www.scaleway.com/_next/static/chunks/turbopack-0-_rp4p6-wb18.js5 KB—✓1st

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

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: public, max-age=60, stale-while-revalidate=300, stale-if-error=86400, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=60, stale-while-revalidate=300, stale-if-error=86400, no-store

DirectiveValueMeaning
public—Any cache may store this response
max-age60Cache for 1 minute
stale-while-revalidate300Serve stale for 5 minutes while fetching fresh
stale-if-error86400
no-store—Never cache this response
Effective TTL: 60 seconds
B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 749 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
A+
Third-Party Impact
10% third-party, 0 ms blocking
PASS
10% third-party, 0 ms blocking
Info::
Third-party code accounts for 10% of page weight (220.1 KiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
90%
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 (209 KB)
PASS
6 fonts (209 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

209 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 3.2 s LCP 11.4 shttps://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff283afe278b6a6bb3c.p.0q-3... https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2 — 47.6 KiB — 0 ms — font-display: swaphttps://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff20c89a48fa5027cee.p.0rd3... https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2 — 22.2 KiB — 0 ms — font-display: swaphttps://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff20c89a48fa5027cee.p.0rd3... https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2 — 22.1 KiB — 0 ms — font-display: swaphttps://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff283afe278b6a6bb3c.p.0q-3... https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2 — 47.6 KiB — 0 ms — font-display: swaphttps://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff283afe278b6a6bb3c.p.0q-3... https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2 — 47.6 KiB — 0 ms — font-display: swaphttps://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff20c89a48fa5027cee.p.0rd3... https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2 — 22.1 KiB — 0 ms — font-display: swap
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... 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
11 hints, 0 missing preconnects
PASS
11 hints, 0 missing preconnects
Info::
Page uses 11 resource hint(s)

Current Resource Hints

preconnect
—
preload
10
dns-prefetch
—
prefetch
1

11 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
82 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
13% of JavaScript execution is third-party
First-party Third-party 553ms · 0KB · €6/mo
Unattributable
Other
Costly
Execution 553ms
Transfer 0 KB
Monthly Cost €6/mo

These scripts may cost more than they're worth

  • Unattributable adds 553ms and costs ~€6/month

Unattributable takes 553ms 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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