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https://Bureau-savini.be

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
5
REVIEW
7
PASS
11
INFO
3

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
66
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

11.10 s

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

23.77 s

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.

11.10 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.

24.16 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
26
11 PASS 7 REVIEW 5 FIX
F
Page Weight Budget
Action
4.0 MB transferred, 78 requests
FIX
4.0 MB transferred, 78 requests
Critical::
Page weighs 7.2 MB (4.0 MB transferred)
Warning::
Images are 2.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.1 MB
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
Fonts are 503 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 503 KB
Info::
78 HTTP requests
Info::
Estimated 0.84 g CO2 per page load
4.0 MB / 2.4 MB budget
4.0 MB transferred
78 requests
0.84 g CO2 per page load
Images 2.1 MiB 52%
JavaScript 1.2 MiB 29%
Fonts 503.4 KiB 12%
CSS 147.8 KiB 4%
HTML 79.1 KiB 2%
Other 14.9 KiB 0%
Other 6.1 KiB 0%
Other 1006 B 0%
Other 508 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

D
Third-Party Impact
Action
67% third-party, 0 ms blocking
FIX
67% third-party, 0 ms blocking
Warning::
Third-party code accounts for 67% of page weight (2.7 MiB of 4.0 MiB)
Info::
Third-party blocking time is low (0 ms)
33%
67%
First-party Third-party
D
JS Bundles
Action
10 scripts, 229 KB unused
FIX
10 scripts, 229 KB unused
Warning::
https://bureau-savini.be/js/leaflet.js: 120 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bureau-savini.be/js/bootstrap.bundle.min.j...: 61 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bureausavini.be/js/jquery-3.3.1.min.js: 48 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bureausavini.be/js/script.js: unminified — 5 KB could be saved
Info::
Total unused JavaScript: 229 KB
229 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://bureau-savini.be/js/leaflet.js144 KB120 KB (83%)✓1st
https://bureau-savini.be/js/bootstrap.bundle.min.js79 KB61 KB (77%)✓1st
https://bureausavini.be/js/jquery-3.3.1.min.js85 KB48 KB (57%)✓3rd
https://bureausavini.be/js/script.js13 KB—✗3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.K__umxhH7-U.2021.O/am=AAAAQA/d=1/excm=base,root/br=1/rs=AGKMywF6bswYMQxJsgg0r5yGlFwp9ZDUdQ/m=root,base155 KB—✓3rd
https://www.youtube.com/s/player/e937390a/player_embed_es6.vflset/en_US/base.js468 KB—✓3rd
https://static.doubleclick.net/instream/ad_status.js0 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.K__umxhH7-U.2021.O/ck=ytembeds.base.7hicoR4Y1WI.L.W.O/am=AAAAQA/d=1/exm=base,root/excm=base,root/ed=1/br=1/rs=AGKMywGw_TlViJexZGC6PsjW6hg8MBHgig/m=r78Drb219 KB—✓3rd
https://www.google.com/js/th/lbOtJYu-XSMPpmqwnfYQu-hXa7FqdGzVnIQYRsDfT3c.js24 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.K__umxhH7-U.2021.O/ck=ytembeds.base.7hicoR4Y1WI.L.W.O/am=AAAAQA/d=1/exm=base,r78Drb,root/excm=base,root/ed=1/br=1/rs=AGKMywGw_TlViJexZGC6PsjW6hg8MBHgig/m=cwx9N17 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

D
Page Weight Inventory
Action
78 resources · 4.0 MB · 229 KB savings available
FIX
78 resources · 4.0 MB · 229 KB savings available
Warning::
Page weight 4.0 MB exceeds 1 MB target by 3.0 MB
Got: 4.0 MB Expected: ≤ 1 MB
Info::
~229 KB of savings available
Warning::
59 third-party resources (67% of weight)
Info::
6 resources over 200KB
78 resources · 4.0 MiB · 59 third-party 3.0 MiB over 1MB target
Image 52% · 2.1 MiB
JavaScript 29% · 1.2 MiB
Font 12% · 503.4 KiB
CSS 4% · 147.8 KiB
Document 2% · 79.4 KiB
Other 0% · 15.7 KiB

~229.5 KiB of savings available

Remove unused JavaScript: 229.5 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
Image Optimization
Action
35 images, 0 KB saveable
REVIEW
35 images, 0 KB saveable
Warning::
https://bureausavini.be/img/avatars/f3.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bureau-savini.be/img/ico_google_review.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://r2.storagewhise.eu/bureausavini/Pictures/7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bureau-savini.be/img/stars/5.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
35 images 2.1 MB
0 oversized -0 KB
30 legacy format
4 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1345ms total JS execution
REVIEW
1345ms total JS execution
Warning::
https://bureau-savini.be/fr/accueil: 841ms CPU time
Warning::
Unattributable: 364ms CPU time
Info::
https://bureausavini.be/js/jquery-3.3.1.min.js: 140ms CPU time
Info::
Third-party scripts: 140ms (10% of total)

Main Thread Breakdown

Style & Layout 36% Other 30% Script Evaluation 17% Rendering 7% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://bureau-savini.be/fr/accueil841ms136ms6ms1st
Unattributable364ms6ms0ms1st
https://bureausavini.be/js/jquery-3.3.1.min.js140ms68ms6ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
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
6 fonts (503 KB)
PASS
6 fonts (503 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

503 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 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s FCP 11.1 s LCP 23.8 shttps://bureau-savini.be/fonts/icomoon/fonts/icomoon.ttf?10si43icomoon.ttf https://bureau-savini.be/fonts/icomoon/fonts/icomoon.ttf?10si43 — 300.3 KiB — 59 ms — font-display: swaphttps://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2JTUSjIg1_i6t8kCHKm459Wl... https://fonts.gstatic.com/s/montserrat/v31/JTUSjIg1_i6t8kCHKm459WlhyyTh89Y.woff2 — 34.7 KiB — 61 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2pxiEyp8kv8JHgFVrJJfecnF... https://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2 — 7.7 KiB — 48 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLCz7Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2 — 7.7 KiB — 48 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.10.2/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47bootstrap-icons.woff2 https://cdnjs.cloudflare.com/ajax/libs/bootstrap-icons/1.10.2/font/fonts/bootstrap-icons.woff2?24e3eb84d0bcaf83d77f904c78ac1f47 — 119.1 KiB — 67 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 97 ms — font-display: swap
icomoon.ttf ttf swap
Size 300 KB
Load time 59 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
JTUSjIg1_i6t8kCHKm459Wl... woff2 swap
Size 35 KB
Load time 61 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
pxiEyp8kv8JHgFVrJJfecnF... woff2 swap
Size 8 KB
Load time 48 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
pxiByp8kv8JHgFVrLCz7Z1x... woff2 swap
Size 8 KB
Load time 48 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
bootstrap-icons.woff2 woff2 swap
Size 119 KB
Load time 67 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 97 ms
Start 1.4 s
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)

Fixing the unchecked items could save ~300 KB and ~600 ms

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::
2 dns-prefetch redundant with preconnect on same origin
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://fonts.gstatic.com, https://fonts.googleapis.com. Remove the redundant dns-prefetch entries.
Info::
Page uses 11 resource hint(s)

Current Resource Hints

preconnect
2
preload
7
dns-prefetch
2
prefetch
—

11 resource hints configured

preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://fonts.gstatic.com, https://fonts.googleapis.com. Remove the redundant dns-prefetch entries.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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+
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
4 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
8 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
78 requests over 4252ms
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 FCP 11.1 s LCP 23.8 shttps://bureau-savini.be// https://bureau-savini.be/ — 301 — 294 B — 88 ms — http/1.1http://bureau-savini.be/fr/accueil/fr/accueil http://bureau-savini.be/fr/accueil — 307 — 0 B — 1 ms — http/1.1https://bureau-savini.be/fr/accueil/fr/accueil https://bureau-savini.be/fr/accueil — 200 — 16.1 KiB — 110 ms — http/1.1https://bureau-savini.be/css/bootstrap.css.php/css/bootstrap.css.php https://bureau-savini.be/css/bootstrap.css.php — 200 — 33.1 KiB — 83 ms — http/1.1https://bureau-savini.be/css/style.css.php/css/style.css.php https://bureau-savini.be/css/style.css.php — 200 — 7.8 KiB — 40 ms — http/1.1https://bureau-savini.be/css/leaflet.css/css/leaflet.css https://bureau-savini.be/css/leaflet.css — 200 — 3.8 KiB — 71 ms — http/1.1https://bureau-savini.be/fonts/bs/font/bootstrap-icons.min.css/fonts/bs/font/bootstrap-icons.min.... https://bureau-savini.be/fonts/bs/font/bootstrap-icons.min.css — 200 — 13.8 KiB — 114 ms — http/1.1https://bureau-savini.be/fonts/icomoon/style.css?01/fonts/icomoon/style.css?01 https://bureau-savini.be/fonts/icomoon/style.css?01 — 200 — 14.8 KiB — 112 ms — http/1.1https://bureau-savini.be/js/bootstrap.bundle.min.js/js/bootstrap.bundle.min.js https://bureau-savini.be/js/bootstrap.bundle.min.js — 200 — 79.2 KiB — 134 ms — http/1.1https://bureau-savini.be/js/leaflet.js/js/leaflet.js https://bureau-savini.be/js/leaflet.js — 200 — 144.5 KiB — 162 ms — http/1.1https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&family=Montserrat:wght@400;500&display=swapfonts.googleapis.com/css2?family=Po... https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&family=Montserrat:wght@400;500&display=swap — 200 — 892 B — 947 ms — h2https://cdn.jsdelivr.net/npm/flatpickr/dist/flatpickr.min.csscdn.jsdelivr.net/npm/flatpickr/dist... https://cdn.jsdelivr.net/npm/flatpickr/dist/flatpickr.min.css — 200 — 3.8 KiB — 95 ms — h2https://bureausavini.be/img/logo.png?nocache=1788081924bureausavini.be/img/logo.png?nocach... https://bureausavini.be/img/logo.png?nocache=1788081924 — 200 — 24.1 KiB — 144 ms — http/1.1https://r2.storagewhise.eu/bureausavini/Pictures/7844349/640/16f5ed5773424712b5da1f23e799a4cb.jpgr2.storagewhise.eu/bureausavini/Pic... https://r2.storagewhise.eu/bureausavini/Pictures/7844349/640/16f5ed5773424712b5da1f23e799a4cb.jpg — 200 — 43.3 KiB — 115 ms — h2https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@200;300;400;500;600;700&display=swapfonts.googleapis.com/css2?family=Nu... https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@200;300;400;500;600;700&display=swap — 200 — 1.2 KiB — 62 ms — h2https://ctrl.rent/immo/epc-Wa/mini/epc-B.pngctrl.rent/immo/epc-Wa/mini/epc-B.pn... https://ctrl.rent/immo/epc-Wa/mini/epc-B.png — 200 — 5.4 KiB — 118 ms — 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h3https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.K__umxhH7-U.2021.O/ck=ytembeds.base.7hicoR4Y1WI.L.W.O/am=AAAAQA/d=1/exm=base,r78Drb,root/excm=base,root/ed=1/br=1/rs=AGKMywGw_TlViJexZGC6PsjW6hg8MBHgig/m=cwx9Nwww.youtube.com/s/_/ytembeds/_/js/k... https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.K__umxhH7-U.2021.O/ck=ytembeds.base.7hicoR4Y1WI.L.W.O/am=AAAAQA/d=1/exm=base,r78Drb,root/excm=base,root/ed=1/br=1/rs=AGKMywGw_TlViJexZGC6PsjW6hg8MBHgig/m=cwx9N — 200 — 17.1 KiB — 93 ms — h3https://googleads.g.doubleclick.net/pagead/id?slf_rd=1googleads.g.doubleclick.net/pagead/... https://googleads.g.doubleclick.net/pagead/id?slf_rd=1 — 200 — 146 B — 57 ms — h3https://i.ytimg.com/vi/oBkhcUJ1aRA/sddefault.jpg?sqp=-oaymwEmCIAFEOAD8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGGUgUyhJMA8=&rs=AOn4CLALMeSKDX8Tw5hFaEwnUPGQsXX0XQi.ytimg.com/vi/oBkhcUJ1aRA/sddefaul... https://i.ytimg.com/vi/oBkhcUJ1aRA/sddefault.jpg?sqp=-oaymwEmCIAFEOAD8quKqQMa8AEB-AH-CYAC0AWKAgwIABABGGUgUyhJMA8=&rs=AOn4CLALMeSKDX8Tw5hFaEwnUPGQsXX0XQ — 200 — 32.9 KiB — 195 ms — h2https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svgwww.gstatic.com/youtube/img/icons/m... https://www.gstatic.com/youtube/img/icons/mweb/youtube_fill/logo/v2/67px.svg — 200 — 727 B — 133 ms — h2https://www.youtube.com/generate_204?aAuoEgwww.youtube.com/generate_204?aAuoEg https://www.youtube.com/generate_204?aAuoEg — 204 — 10 B — 25 ms — h3https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 0 B — 94 ms — h2https://bureau-savini.be/img/fav/favicon.ico?nocache=1788081924/img/fav/favicon.ico?nocache=178808... https://bureau-savini.be/img/fav/favicon.ico?nocache=1788081924 — 200 — 5.8 KiB — 30 ms — http/1.1https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateITjnn-pa.googleapis.com/$rpc/google.i... https://jnn-pa.googleapis.com/$rpc/google.internal.waa.v1.Waa/GenerateIT — 200 — 312 B — 31 ms — h2https://www.youtube.com/youtubei/v1/log_event?alt=jsonwww.youtube.com/youtubei/v1/log_eve... https://www.youtube.com/youtubei/v1/log_event?alt=json — 200 — 50 B — 31 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
10% of JavaScript execution is third-party
First-party Third-party 140ms · 85KB · €2/mo
bureausavini.be
Other
Optional
Execution 140ms
Transfer 85 KB
Unused 57%
Monthly Cost €2/mo

57% of bureausavini.be's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

Image Optimization
61 images, 1005 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

61

Total Size

1005 KB

Oversized

6

37 missing alt text 61 missing dimensions 60 missing lazy loading
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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