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https://Vanessave.ilysix.fr

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
5
PASS
14
INFO
2

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
81
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
90
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.

24.51 s

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

25.70 s

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

137 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.

24.51 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.

25.70 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
25
14 PASS 5 REVIEW 4 FIX
F
Page Weight Budget
Action
4.5 MB transferred, 20 requests
FIX
4.5 MB transferred, 20 requests
Critical::
Page weighs 4.5 MB (4.5 MB transferred)
Warning::
JavaScript is 3.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.7 MB
Info::
CSS is 651 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 651 KB
Info::
20 HTTP requests
Info::
Estimated 0.94 g CO2 per page load
4.5 MB / 2.4 MB budget
4.5 MB transferred
20 requests
0.94 g CO2 per page load
JavaScript 3.7 MiB 84%
CSS 651.3 KiB 14%
Fonts 53.0 KiB 1%
HTML 28.6 KiB 1%
Other 14.8 KiB 0%
Other 415 B 0%
Images 0 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

F
JS Bundles
Action
7 scripts, 2.7 MB unused
FIX
7 scripts, 2.7 MB unused
Warning::
https://vanessave.ilysix.fr/_content/BlazorMonaco/...: 2.6 MB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanessave.ilysix.fr/_framework/blazor.web....: 99 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanessave.ilysix.fr/_content/MudBlazor/Mud...: 42 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanessave.ilysix.fr/_content/BlazorMonaco/...: 31 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanessave.ilysix.fr/_content/BlazorMonaco/...: unminified — 10 KB could be saved
Info::
Total unused JavaScript: 2.7 MB
2802 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.js3441 KB2629 KB (76%)✓1st
https://vanessave.ilysix.fr/_framework/blazor.web.js183 KB99 KB (54%)✓1st
https://vanessave.ilysix.fr/_content/MudBlazor/MudBlazor.min.js46 KB42 KB (91%)✓1st
https://vanessave.ilysix.fr/_content/BlazorMonaco/jsInterop.js36 KB31 KB (88%)✗1st
https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/loader.js29 KB—✓1st
https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.nls.js94 KB—✓1st
https://vanessave.ilysix.fr/_content/Toolbelt.Blazor.FileDropZone/script.min.js?v=2.1.11 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

F
Page Weight Inventory
Action
20 resources · 4.5 MB · 2.7 MB savings available
FIX
20 resources · 4.5 MB · 2.7 MB savings available
Warning::
Page weight 4.5 MB exceeds 1 MB target by 3.5 MB
Got: 4.5 MB Expected: ≤ 1 MB
Info::
~2.7 MB of savings available
Info::
4 third-party resources (1% of weight)
Info::
2 resources over 200KB
20 resources · 4.5 MiB · 4 third-party 3.5 MiB over 1MB target
JavaScript 84% · 3.7 MiB
CSS 14% · 651.3 KiB
Font 1% · 53.0 KiB
Document 1% · 28.6 KiB
Image 0% · 14.8 KiB
Other 0% · 415 B

~2.7 MiB of savings available

Remove unused JavaScript: 2.7 MiB
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: no-cache, no-store, max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store, max-age=0

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
C
JS Execution Cost
Action
1099ms total JS execution
REVIEW
1099ms total JS execution
Warning::
https://vanessave.ilysix.fr/_content/BlazorMonaco/...: 419ms CPU time
Warning::
https://vanessave.ilysix.fr/_content/BlazorMonaco/...: 271ms CPU time
Info::
https://vanessave.ilysix.fr/_framework/blazor.web....: 176ms CPU time
Info::
Unattributable: 131ms CPU time
Info::
https://vanessave.ilysix.fr/: 102ms CPU time
Info::
Third-party scripts: 131ms (12% of total)

Main Thread Breakdown

Script Evaluation 50% Script Parsing & Compilation 23% Other 14% Style & Layout 7% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.js419ms175ms235ms1st
https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.nls.js271ms264ms6ms1st
https://vanessave.ilysix.fr/_framework/blazor.web.js176ms106ms15ms1st
Unattributable131ms13ms0ms3rd
https://vanessave.ilysix.fr/102ms16ms1ms1st
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
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.
B
JavaScript Blocking
1 JS blocking issue(s) detected
REVIEW
1 JS blocking issue(s) detected
Warning::
5 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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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 (55.2 KiB of 4.5 MiB)
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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (53 KB)
PASS
2 fonts (53 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

53 KB total

Render-blocking

0

of 2

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 26.0 s FCP 24.5 s LCP 25.7 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 53 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 16.3 KiB — 37 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 53 ms
Start 525 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 16 KB
Load time 37 ms
Start 923 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+
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+
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 uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-cache, no-store, max-age=0
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
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
5 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
20 requests over 960ms
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 FCP 24.5 s LCP 25.7 shttps://vanessave.ilysix.fr// https://vanessave.ilysix.fr/ — 200 — 28.6 KiB — 97 ms — h2https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swapfonts.googleapis.com/css?family=Rob... https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap — 200 — 2.2 KiB — 163 ms — h2https://vanessave.ilysix.fr/_content/MudBlazor/MudBlazor.min.css/_content/MudBlazor/MudBlazor.min.c... https://vanessave.ilysix.fr/_content/MudBlazor/MudBlazor.min.css — 200 — 528.6 KiB — 138 ms — h2https://vanessave.ilysix.fr/Vanessave.styles.css/Vanessave.styles.css https://vanessave.ilysix.fr/Vanessave.styles.css — 200 — 2.7 KiB — 33 ms — h2https://vanessave.ilysix.fr/styles.css/styles.css https://vanessave.ilysix.fr/styles.css — 200 — 250 B — 31 ms — h2https://vanessave.ilysix.fr/_content/BlazorMonaco/jsInterop.js/_content/BlazorMonaco/jsInterop.js https://vanessave.ilysix.fr/_content/BlazorMonaco/jsInterop.js — 200 — 35.7 KiB — 196 ms — h2https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/loader.js/_content/BlazorMonaco/lib/monaco-e... https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/loader.js — 200 — 29.5 KiB — 196 ms — h2https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.js/_content/BlazorMonaco/lib/monaco-e... https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.js — 200 — 3.4 MiB — 290 ms — h2https://vanessave.ilysix.fr/_framework/blazor.web.js/_framework/blazor.web.js https://vanessave.ilysix.fr/_framework/blazor.web.js — 200 — 183.3 KiB — 196 ms — h2https://vanessave.ilysix.fr/_content/MudBlazor/MudBlazor.min.js/_content/MudBlazor/MudBlazor.min.j... https://vanessave.ilysix.fr/_content/MudBlazor/MudBlazor.min.js — 200 — 46.4 KiB — 198 ms — h2https://vanessave.ilysix.fr/_content/Vanessave.Shared/Vanessave.Shared.bundle.scp.css/_content/Vanessave.Shared/Vanessav... https://vanessave.ilysix.fr/_content/Vanessave.Shared/Vanessave.Shared.bundle.scp.css — 200 — 375 B — 210 ms — h2https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.css/_content/BlazorMonaco/lib/monaco-e... https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.css — 200 — 117.1 KiB — 33 ms — h2https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.nls.js/_content/BlazorMonaco/lib/monaco-e... https://vanessave.ilysix.fr/_content/BlazorMonaco/lib/monaco-editor/min/vs/editor/editor.main.nls.js — 200 — 94.4 KiB — 31 ms — h2data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='…www.w3.org/2000/svg' viewBox='0 0 3... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='… — 200 — 0 B — 0 ms — datahttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 53 ms — h3https://vanessave.ilysix.fr/_blazor/initializers/_blazor/initializers https://vanessave.ilysix.fr/_blazor/initializers — 200 — 58 B — 28 ms — h2https://vanessave.ilysix.fr/_blazor/negotiate?negotiateVersion=1/_blazor/negotiate?negotiateVersion... https://vanessave.ilysix.fr/_blazor/negotiate?negotiateVersion=1 — 200 — 357 B — 28 ms — h2https://vanessave.ilysix.fr/favicon.ico/favicon.ico https://vanessave.ilysix.fr/favicon.ico — 200 — 14.8 KiB — 37 ms — h2https://vanessave.ilysix.fr/_content/Toolbelt.Blazor.FileDropZone/script.min.js?v=2.1.1/_content/Toolbelt.Blazor.FileDropZ... https://vanessave.ilysix.fr/_content/Toolbelt.Blazor.FileDropZone/script.min.js?v=2.1.1 — 200 — 1.5 KiB — 44 ms — h2https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 200 — 16.3 KiB — 37 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
12% of JavaScript execution is third-party
First-party Third-party 131ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 131ms
Transfer 0 KB
Monthly Cost €1/mo

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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