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https://www.wellnesscalmspaprive.be

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
1
REVIEW
1
PASS
17
INFO
3

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

465 ms

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

825 ms

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

0 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.

723 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

829 ms

Page Load Progression

1.8 s
3.6 s
5.4 s
7.1 s
8.9 s
10.7 s
12.5 s
14.3 s
Checks
22
17 PASS 1 REVIEW 1 FIX
D
JS Execution Cost
Action
3349ms total JS execution
FIX
3349ms total JS execution
Warning::
https://www.wellnesscalmspaprive.be/: 3146ms CPU time
Info::
Unattributable: 203ms CPU time

Main Thread Breakdown

Other 44% Style & Layout 42% Rendering 11%
ScriptTotalScriptingParse/CompileParty
https://www.wellnesscalmspaprive.be/3146ms31ms2ms1st
Unattributable203ms7ms0ms1st
B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
339 KB transferred, 23 requests
PASS
339 KB transferred, 23 requests
Info::
Page weighs 484 KB (339 KB transferred)
Info::
23 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
339 KB / 2.4 MB budget
339 KB transferred
23 requests
0.07 g CO2 per page load
Images 250.2 KiB 74%
JavaScript 36.5 KiB 11%
CSS 25.3 KiB 7%
HTML 17.6 KiB 5%
Other 4.3 KiB 1%
Other 3.4 KiB 1%
Other 1.5 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
1% third-party, 0 ms blocking
PASS
1% third-party, 0 ms blocking
Info::
Third-party code accounts for 1% of page weight (4.3 KiB of 338.9 KiB)
Info::
Third-party blocking time is low (0 ms)
99%
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+
Image Optimization
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 250 KB
0 oversized -0 KB
1 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+
JS Bundles
9 scripts, 0 KB unused
PASS
9 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.wellnesscalmspaprive.be/suivi.js?v=426f44514 KB—✓1st
https://www.wellnesscalmspaprive.be/site.js?v=426f44519 KB—✓1st
https://www.wellnesscalmspaprive.be/config-site.js?v=426f44513 KB—✓1st
https://www.wellnesscalmspaprive.be/consentement.js?v=426f44512 KB—✓1st
https://www.wellnesscalmspaprive.be/anti-robot.js?v=426f44512 KB—✓1st
https://www.wellnesscalmspaprive.be/chat.js?v=426f44513 KB—✓1st
https://www.wellnesscalmspaprive.be/presence.js?v=426f44512 KB—✓1st
https://www.wellnesscalmspaprive.be/fetes.js?v=c6116a6612 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d873017920888140920 KB—✓3rd
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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Page Weight Inventory
23 resources · 339 KB · 0 KB savings available
PASS
23 resources · 339 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 339 KB
Info::
5 third-party resources (1% of weight)
23 resources · 338.9 KiB · 5 third-party Within 1MB page-weight target
Image 75% · 253.6 KiB
JavaScript 11% · 36.5 KiB
CSS 7% · 25.3 KiB
Document 5% · 17.6 KiB
Other 2% · 5.8 KiB
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

Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
23 requests over 41147ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s FCP 465 ms LCP 825 mshttps://www.wellnesscalmspaprive.be// https://www.wellnesscalmspaprive.be/ — 200 — 17.6 KiB — 183 ms — h3https://www.wellnesscalmspaprive.be/style.css?v=426f4451/style.css?v=426f4451 https://www.wellnesscalmspaprive.be/style.css?v=426f4451 — 200 — 21.2 KiB — 173 ms — h3https://www.wellnesscalmspaprive.be/fetes.css?v=c6116a66/fetes.css?v=c6116a66 https://www.wellnesscalmspaprive.be/fetes.css?v=c6116a66 — 200 — 4.1 KiB — 198 ms — h3https://www.wellnesscalmspaprive.be/images/calm-spa-logo-original-160.webp/images/calm-spa-logo-original-160.... https://www.wellnesscalmspaprive.be/images/calm-spa-logo-original-160.webp — 200 — 10.1 KiB — 104 ms — h3https://www.wellnesscalmspaprive.be/images/calm-spa-2-jette-jacuzzi-1600.webp/images/calm-spa-2-jette-jacuzzi-16... https://www.wellnesscalmspaprive.be/images/calm-spa-2-jette-jacuzzi-1600.webp — 200 — 94.5 KiB — 123 ms — h3https://www.wellnesscalmspaprive.be/suivi.js?v=426f4451/suivi.js?v=426f4451 https://www.wellnesscalmspaprive.be/suivi.js?v=426f4451 — 200 — 3.7 KiB — 170 ms — h3https://www.wellnesscalmspaprive.be/site.js?v=426f4451/site.js?v=426f4451 https://www.wellnesscalmspaprive.be/site.js?v=426f4451 — 200 — 9.3 KiB — 46 ms — h3https://www.wellnesscalmspaprive.be/config-site.js?v=426f4451/config-site.js?v=426f4451 https://www.wellnesscalmspaprive.be/config-site.js?v=426f4451 — 200 — 2.5 KiB — 86 ms — h3https://www.wellnesscalmspaprive.be/consentement.js?v=426f4451/consentement.js?v=426f4451 https://www.wellnesscalmspaprive.be/consentement.js?v=426f4451 — 200 — 2.3 KiB — 68 ms — h3https://www.wellnesscalmspaprive.be/anti-robot.js?v=426f4451/anti-robot.js?v=426f4451 https://www.wellnesscalmspaprive.be/anti-robot.js?v=426f4451 — 200 — 1.9 KiB — 75 ms — h3https://www.wellnesscalmspaprive.be/chat.js?v=426f4451/chat.js?v=426f4451 https://www.wellnesscalmspaprive.be/chat.js?v=426f4451 — 200 — 3.3 KiB — 181 ms — h3https://www.wellnesscalmspaprive.be/presence.js?v=426f4451/presence.js?v=426f4451 https://www.wellnesscalmspaprive.be/presence.js?v=426f4451 — 200 — 1.8 KiB — 148 ms — h3https://www.wellnesscalmspaprive.be/fetes.js?v=c6116a66/fetes.js?v=c6116a66 https://www.wellnesscalmspaprive.be/fetes.js?v=c6116a66 — 200 — 11.7 KiB — 69 ms — h3https://www.wellnesscalmspaprive.be/manifest.webmanifest/manifest.webmanifest https://www.wellnesscalmspaprive.be/manifest.webmanifest — 200 — 1.5 KiB — 102 ms — h3https://www.wellnesscalmspaprive.be/elisa/elisa-calm-spa.jpg/elisa/elisa-calm-spa.jpg https://www.wellnesscalmspaprive.be/elisa/elisa-calm-spa.jpg — 200 — 51.2 KiB — 60 ms — h3https://www.wellnesscalmspaprive.be/images/calm-spa-jette-piscine-privee-960.webp/images/calm-spa-jette-piscine-priv... https://www.wellnesscalmspaprive.be/images/calm-spa-jette-piscine-privee-960.webp — 200 — 62.8 KiB — 35 ms — h3https://www.wellnesscalmspaprive.be/images/spa-louise-ixelles-piscine-31-960.webp/images/spa-louise-ixelles-piscine-... https://www.wellnesscalmspaprive.be/images/spa-louise-ixelles-piscine-31-960.webp — 200 — 31.7 KiB — 35 ms — h3https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 — -1 — 0 B — 0 ms — https://calmspa-gestion.samadeveloppement.workers.dev/api/public/config-sitecalmspa-gestion.samadeveloppement.w... https://calmspa-gestion.samadeveloppement.workers.dev/api/public/config-site — 200 — 1.8 KiB — 460 ms — h3https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presencecalmspa-gestion.samadeveloppement.w... https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presence — 200 — 873 B — 758 ms — h3https://www.wellnesscalmspaprive.be/images/icone-calm-32.png/images/icone-calm-32.png https://www.wellnesscalmspaprive.be/images/icone-calm-32.png — 200 — 3.4 KiB — 25 ms — h3https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presencecalmspa-gestion.samadeveloppement.w... https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presence — 200 — 872 B — 498 ms — h3https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presencecalmspa-gestion.samadeveloppement.w... https://calmspa-gestion.samadeveloppement.workers.dev/api/public/presence — 200 — 878 B — 485 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
12 images, 166 KB total, 49 KB wasted
INFO

Image Optimization Audit

Total Images

12

Total Size

166 KB

Oversized

1

Wasted

49 KB

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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