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https://online.fr

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
93
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.
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.

605 ms

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

1.42 s

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

133 ms

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

0.016

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

1.02 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.

2.26 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
15
6 PASS 3 REVIEW 4 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 (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
37 scripts, 485 KB unused
FIX
37 scripts, 485 KB unused
Warning::
https://www.scaleway.com/_next/static/chunks/0oor5...: 144 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0dapp...: 108 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0y~mq...: 104 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0e.em...: 49 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.scaleway.com/_next/static/chunks/0o2mr...: 42 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 485 KB
485 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.scaleway.com/_next/static/chunks/0oor5ci-uuyuu.js193 KB144 KB (75%)✓3rd
https://www.scaleway.com/_next/static/chunks/0dappseomqdq7.js136 KB108 KB (80%)✓3rd
https://www.scaleway.com/_next/static/chunks/0y~mq96bt9zjh.js104 KB104 KB (100%)✓3rd
https://www.scaleway.com/_next/static/chunks/0e.em8d665ar4.js135 KB49 KB (36%)✓3rd
https://www.scaleway.com/_next/static/chunks/0o2mrezi6s0sr.js104 KB42 KB (41%)✓3rd
https://www.scaleway.com/_next/static/chunks/0h7kkxfcsy964.js99 KB38 KB (39%)✓3rd
https://www.scaleway.com/_next/static/chunks/turbopack-0akb2y_2-2-89.js4 KB—✓3rd
https://www.scaleway.com/_next/static/sLEzLT-UzFBJfNV5WbEGq/_clientMiddlewareManifest.js0 KB—✓3rd
https://www.scaleway.com/_next/static/chunks/turbopack-0jkqks.awmczj.js4 KB—✓3rd
https://www.scaleway.com/_next/static/chunks/0lopj98wlj7qr.js8 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
Page Weight Inventory
Action
79 resources · 1.8 MB · 485 KB savings available
FIX
79 resources · 1.8 MB · 485 KB savings available
Warning::
Page weight 855 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~485 KB of savings available
Warning::
78 third-party resources (100% of weight)
79 resources · 1.8 MiB · 78 third-party 855.2 KiB over 1MB target
JavaScript 53% · 992.9 KiB
Image 22% · 419.6 KiB
Font 11% · 209.1 KiB
Other 6% · 118.4 KiB
CSS 4% · 83.1 KiB
Document 3% · 56.0 KiB

~485.3 KiB of savings available

Remove unused JavaScript: 485.3 KiB
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.

C
Page Weight Budget
Action
1.8 MB transferred, 79 requests
REVIEW
1.8 MB transferred, 79 requests
Info::
Page weighs 5.3 MB (1.8 MB transferred)
Warning::
JavaScript is 992 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 992 KB
Info::
79 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
79 requests
0.38 g CO2 per page load
JavaScript 992.3 KiB 53%
Images 406.8 KiB 22%
Fonts 139.3 KiB 7%
Other 112.6 KiB 6%
Other 83.3 KiB 4%
CSS 83.1 KiB 4%
HTML 56.0 KiB 3%
Other 4.4 KiB 0%
Other 1.3 KiB 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

B
Image Optimization
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Info::
All images are well-optimized
13 images 407 KB
0 oversized -0 KB
8 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
689ms total JS execution
REVIEW
689ms total JS execution
Warning::
https://www.scaleway.com/_next/static/chunks/0e.em...: 257ms CPU time
Info::
https://www.scaleway.com/_next/static/chunks/turbo...: 162ms CPU time
Info::
Unattributable: 124ms CPU time
Info::
https://www.scaleway.com/fr/dedibox/: 79ms CPU time
Info::
https://www.scaleway.com/_next/static/chunks/turbo...: 66ms CPU time
Warning::
Third-party scripts: 689ms (100% of total)

Main Thread Breakdown

Script Evaluation 63% Other 15% Style & Layout 9% Script Parsing & Compilation 8%
ScriptTotalScriptingParse/CompileParty
https://www.scaleway.com/_next/static/chunks/0e.em8d665ar4.js257ms218ms10ms3rd
https://www.scaleway.com/_next/static/chunks/turbopack-0jkqks.awmczj.js162ms158ms0ms3rd
Unattributable124ms22ms0ms3rd
https://www.scaleway.com/fr/dedibox/79ms2ms0ms3rd
https://www.scaleway.com/_next/static/chunks/turbopack-0akb2y_2-2-89.js66ms66ms0ms3rd
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 500 ms 1.0 s FCP 605 ms LCP 1.4 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 — 47.5 KiB — 71 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 — 22.0 KiB — 71 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 — 47.7 KiB — 106 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 — 99 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 — 30 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 — 30 ms — font-display: swap
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 47 KB
Load time 71 ms
Start 143 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... woff2 swap
Size 22 KB
Load time 71 ms
Start 144 ms
Risk FOUT — text flashes from fallback to web font
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 48 KB
Load time 106 ms
Start 317 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... woff2 swap
Size 22 KB
Load time 99 ms
Start 317 ms
Risk FOUT — text flashes from fallback to web font
83afe278b6a6bb3c.p.0q-3... woff2 swap
Size 48 KB
Load time 30 ms
Start 626 ms
Risk FOUT — text flashes from fallback to web font
0c89a48fa5027cee.p.0rd3... woff2 swap
Size 22 KB
Load time 30 ms
Start 626 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Scaleway

Network Waterfall
79 requests over 2110ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 605 ms LCP 1.4 shttps://online.fr// https://online.fr/ — 301 — 101 B — 55 ms — http/1.1https://www.scaleway.com/fr/dedibox/www.scaleway.com/fr/dedibox/ https://www.scaleway.com/fr/dedibox/ — 200 — 56.0 KiB — 96 ms — h2https://www-uploads.scaleway.com/3_D_Dedibox_Illustration_3_D_35f1f6031a.webpwww-uploads.scaleway.com/3_D_Dedibo... https://www-uploads.scaleway.com/3_D_Dedibox_Illustration_3_D_35f1f6031a.webp — 200 — 114.4 KiB — 73 ms — h2https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2www.scaleway.com/_next/static/media... https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2 — 200 — 47.5 KiB — 71 ms — h2https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2www.scaleway.com/_next/static/media... https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2 — 200 — 22.0 KiB — 71 ms — h2https://www.scaleway.com/_next/static/chunks/0flm0cl~p0z1g.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0flm0cl~p0z1g.css — 200 — 1.3 KiB — 28 ms — h2https://www.scaleway.com/_next/static/chunks/0v_ock0m1q~u2.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0v_ock0m1q~u2.css — 200 — 20.6 KiB — 33 ms — h2https://www.scaleway.com/_next/static/chunks/0-co6ohyflokr.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0-co6ohyflokr.css — 200 — 5.5 KiB — 33 ms — h2https://www.scaleway.com/_next/static/chunks/0f_uy-bc_q138.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0f_uy-bc_q138.css — 200 — 8.0 KiB — 29 ms — h2https://www.scaleway.com/_next/static/chunks/014zvrrw3g6s2.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/014zvrrw3g6s2.css — 200 — 13.3 KiB — 36 ms — h2https://www.scaleway.com/_next/static/chunks/11hm5tjyl_dyp.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/11hm5tjyl_dyp.css — 200 — 10.1 KiB — 63 ms — h2https://www.scaleway.com/_next/static/chunks/0ef3za3gh7mjg.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0ef3za3gh7mjg.css — 200 — 12.5 KiB — 35 ms — h2https://www.scaleway.com/_next/static/chunks/0nfwmb25zr0r-.csswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0nfwmb25zr0r-.css — 200 — 11.7 KiB — 35 ms — h2https://www.scaleway.com/_next/static/chunks/0dpq4112-74p~.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0dpq4112-74p~.js — 200 — 9.9 KiB — 64 ms — h2https://www.scaleway.com/_next/static/chunks/0l~38dy~pkeyj.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0l~38dy~pkeyj.js — 200 — 10.3 KiB — 64 ms — h2https://www.scaleway.com/_next/static/chunks/0d8z..aizug4z.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0d8z..aizug4z.js — 200 — 7.8 KiB — 64 ms — h2https://www.scaleway.com/_next/static/chunks/0ujv3hs~6qh_2.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0ujv3hs~6qh_2.js — 200 — 17.5 KiB — 65 ms — h2https://www.scaleway.com/_next/static/chunks/0e.em8d665ar4.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0e.em8d665ar4.js — 200 — 135.0 KiB — 71 ms — h2https://www.scaleway.com/_next/static/chunks/06do3kv0a4-by.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/06do3kv0a4-by.js — 200 — 27.4 KiB — 67 ms — h2https://www.scaleway.com/_next/static/chunks/0xpg~4nzbt~yh.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0xpg~4nzbt~yh.js — 200 — 19.7 KiB — 67 ms — h2https://www.scaleway.com/_next/static/chunks/0o2mrezi6s0sr.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0o2mrezi6s0sr.js — 200 — 104.0 KiB — 73 ms — h2https://www.scaleway.com/_next/static/chunks/turbopack-0jkqks.awmczj.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/turbopack-0jkqks.awmczj.js — 200 — 4.4 KiB — 73 ms — h2https://www.scaleway.com/_next/static/chunks/0lopj98wlj7qr.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0lopj98wlj7qr.js — 200 — 8.2 KiB — 73 ms — h2https://www.scaleway.com/_next/static/chunks/13v82mxu9cn89.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/13v82mxu9cn89.js — 200 — 11.7 KiB — 73 ms — h2https://www.scaleway.com/_next/static/chunks/0g9-ngoy37z~k.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0g9-ngoy37z~k.js — 200 — 9.8 KiB — 73 ms — h2https://www.scaleway.com/_next/static/chunks/0dappseomqdq7.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0dappseomqdq7.js — 200 — 135.5 KiB — 79 ms — h2https://www.scaleway.com/_next/static/chunks/13teduazyc73l.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/13teduazyc73l.js — 200 — 11.9 KiB — 76 ms — h2https://www.scaleway.com/_next/static/chunks/0oor5ci-uuyuu.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0oor5ci-uuyuu.js — 200 — 192.8 KiB — 84 ms — h2https://www.scaleway.com/_next/static/chunks/0h7kkxfcsy964.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0h7kkxfcsy964.js — 200 — 99.0 KiB — 87 ms — h2https://www.scaleway.com/_next/static/chunks/0y~mq96bt9zjh.jswww.scaleway.com/_next/static/chunk... https://www.scaleway.com/_next/static/chunks/0y~mq96bt9zjh.js — 200 — 103.9 KiB — 88 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 605 ms LCP 1.4 shttps://online.fr// https://online.fr/ — 301 — 101 B — 55 ms — http/1.1https://www.scaleway.com/fr/dedibox/www.scaleway.com/fr/dedibox/ https://www.scaleway.com/fr/dedibox/ — 200 — 56.0 KiB — 96 ms — h2https://www-uploads.scaleway.com/3_D_Dedibox_Illustration_3_D_35f1f6031a.webpwww-uploads.scaleway.com/3_D_Dedibo... https://www-uploads.scaleway.com/3_D_Dedibox_Illustration_3_D_35f1f6031a.webp — 200 — 114.4 KiB — 73 ms — h2https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2www.scaleway.com/_next/static/media... https://www.scaleway.com/_next/static/media/83afe278b6a6bb3c.p.0q-301v4kxxnr.woff2 — 200 — 47.5 KiB — 71 ms — h2https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2www.scaleway.com/_next/static/media... https://www.scaleway.com/_next/static/media/0c89a48fa5027cee.p.0rd3rjvnnhw7n.woff2 — 200 — 22.0 KiB — 71 ms — 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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 689ms · 200KB · €3/mo
www.scaleway.com
Other
Costly
Execution 257ms
Transfer 135 KB
Unused 36%
Monthly Cost €1/mo
www.scaleway.com
Other
Optional
Execution 162ms
Transfer 4 KB
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 124ms
Transfer 0 KB
Monthly Cost €1/mo
www.scaleway.com
Other
Optional
Execution 79ms
Transfer 56 KB
Monthly Cost €0/mo
www.scaleway.com
Other
Optional
Execution 66ms
Transfer 4 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.scaleway.com adds 257ms and costs ~€1/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.scaleway.com takes 257ms 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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