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https://senat.fr

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.

6.60 s

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

11.02 s

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

416 ms

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

0.057

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

6.60 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.

11.18 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
17
8 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 Execution Cost
Action
2255ms total JS execution
FIX
2255ms total JS execution
Warning::
https://www.senat.fr/_assets/cru-1776709016/eee83a...: 736ms CPU time
Warning::
https://www.senat.fr/: 559ms CPU time
Warning::
Unattributable: 451ms CPU time
Warning::
https://www.senat.fr/_assets/cru-1776709016/eee83a...: 393ms CPU time
Info::
https://www.senat.fr/_assets/cru-1776709016/eee83a...: 60ms CPU time
Warning::
Third-party scripts: 2255ms (100% of total)

Main Thread Breakdown

Style & Layout 40% Script Evaluation 23% Other 23% Script Parsing & Compilation 5% Parse HTML & CSS 4% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/senat.js?1775688233736ms359ms13ms3rd
https://www.senat.fr/559ms32ms4ms3rd
Unattributable451ms24ms0ms3rd
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/vendor.js?1775688233393ms61ms93ms3rd
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/styles/senat.css?177568823360ms0ms0ms3rd
https://stats.integra.fr/matomo.js55ms44ms11ms3rd
D
Page Weight Inventory
Action
45 resources · 1.8 MB · 123 KB savings available
FIX
45 resources · 1.8 MB · 123 KB savings available
Warning::
Page weight 839 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~123 KB of savings available
Warning::
44 third-party resources (100% of weight)
45 resources · 1.8 MiB · 44 third-party 839.2 KiB over 1MB target
Image 49% · 904.2 KiB
Font 35% · 645.1 KiB
JavaScript 11% · 208.5 KiB
CSS 4% · 74.4 KiB
Document 2% · 29.3 KiB
Other 0% · 1.7 KiB

~122.7 KiB of savings available

Remove unused JavaScript: 122.7 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, 45 requests
REVIEW
1.8 MB transferred, 45 requests
Info::
Page weighs 2.7 MB (1.8 MB transferred)
Info::
Fonts are 645 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 645 KB
Info::
45 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
45 requests
0.38 g CO2 per page load
Images 896.6 KiB 48%
Fonts 645.1 KiB 35%
JavaScript 208.5 KiB 11%
CSS 74.4 KiB 4%
HTML 29.3 KiB 2%
Other 7.7 KiB 0%
Other 786 B 0%
Other 559 B 0%
Other 286 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
JS Bundles
4 scripts, 123 KB unused
REVIEW
4 scripts, 123 KB unused
Warning::
https://www.senat.fr/_assets/cru-1776709016/eee83a...: 84 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://stats.integra.fr/matomo.js: 39 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 123 KB
123 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/vendor.js?1775688233122 KB84 KB (69%)✓3rd
https://stats.integra.fr/matomo.js66 KB39 KB (59%)✓3rd
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/manifest.js?17756882331 KB—✓3rd
https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/senat.js?177568823319 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

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
Image Optimization
23 images, 0 KB saveable
PASS
23 images, 0 KB saveable
Info::
All images are well-optimized
23 images 897 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
9 fonts (645 KB)
PASS
9 fonts (645 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

645 KB total

Render-blocking

0

of 9

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 6.6 s LCP 11.0 shttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBold.woff2?0a5c133db8db023b7e79c8ea84964542OpenSans-SemiBold.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBold.woff2?0a5c133db8db023b7e79c8ea84964542 — 58.5 KiB — 67 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/vendor/bootstrap-icons/bootstrap-icons.woff2?92ea18a81d737146ff044ddb52010366bootstrap-icons.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/vendor/bootstrap-icons/bootstrap-icons.woff2?92ea18a81d737146ff044ddb52010366 — 131.4 KiB — 72 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Regular.woff2?6fdfc32f958aca18e06f9275d24296c8OpenSans-Regular.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Regular.woff2?6fdfc32f958aca18e06f9275d24296c8 — 58.6 KiB — 86 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Bold.woff2?9e4646a97275c486ddef470b6d8d6452OpenSans-Bold.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Bold.woff2?9e4646a97275c486ddef470b6d8d6452 — 56.7 KiB — 96 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/Raleway-Bold.woff2?37ef5663ade70b5e6f59adc005294cc3Raleway-Bold.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/Raleway-Bold.woff2?37ef5663ade70b5e6f59adc005294cc3 — 62.2 KiB — 96 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Light.woff2?0cb2c7f1ad4cae762219a7fff16cbdd3OpenSans-Light.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Light.woff2?0cb2c7f1ad4cae762219a7fff16cbdd3 — 58.3 KiB — 99 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Italic.woff2?e87aeb07725cd7e808f35da154b8e71cOpenSans-Italic.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-Italic.woff2?e87aeb07725cd7e808f35da154b8e71c — 61.5 KiB — 100 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBoldItalic.woff2?ba71df007e6359d830ec4fea8d5d69cfOpenSans-SemiBoldItalic... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBoldItalic.woff2?ba71df007e6359d830ec4fea8d5d69cf — 61.5 KiB — 97 ms — font-display: swaphttps://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/Rasa-Medium.woff2?727219abc6f6b54460125c86016a9c94Rasa-Medium.woff2 https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/Rasa-Medium.woff2?727219abc6f6b54460125c86016a9c94 — 96.5 KiB — 37 ms — font-display: swap
OpenSans-SemiBold.woff2 woff2 swap
Size 59 KB
Load time 67 ms
Start 418 ms
Risk FOUT — text flashes from fallback to web font
bootstrap-icons.woff2 woff2 swap
Size 131 KB
Load time 72 ms
Start 420 ms
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
OpenSans-Regular.woff2 woff2 swap
Size 59 KB
Load time 86 ms
Start 421 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-Bold.woff2 woff2 swap
Size 57 KB
Load time 96 ms
Start 422 ms
Risk FOUT — text flashes from fallback to web font
Raleway-Bold.woff2 woff2 swap
Size 62 KB
Load time 96 ms
Start 423 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-Light.woff2 woff2 swap
Size 58 KB
Load time 99 ms
Start 425 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-Italic.woff2 woff2 swap
Size 61 KB
Load time 100 ms
Start 425 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-SemiBoldItalic... woff2 swap
Size 61 KB
Load time 97 ms
Start 430 ms
Risk FOUT — text flashes from fallback to web font
Rasa-Medium.woff2 woff2 swap
Size 96 KB
Load time 37 ms
Start 632 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)

Fixing the unchecked items could save ~66 KB and ~132 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
Network Waterfall
45 requests over 1414ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.6 s LCP 11.0 shttps://senat.fr// https://senat.fr/ — 301 — 125 B — 96 ms — http/1.0https://www.senat.fr/www.senat.fr/ https://www.senat.fr/ — 200 — 29.3 KiB — 119 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/styles/senat.css?1775688233www.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/styles/senat.css?1775688233 — 200 — 74.4 KiB — 41 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/senat-logo.svgwww.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/senat-logo.svg — 200 — 2.1 KiB — 54 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/manifest.js?1775688233www.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/manifest.js?1775688233 — 200 — 1.3 KiB — 26 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/vendor.js?1775688233www.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/vendor.js?1775688233 — 200 — 122.0 KiB — 67 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/senat.js?1775688233www.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/scripts/senat.js?1775688233 — 200 — 18.9 KiB — 25 ms — http/1.1https://stats.integra.fr/matomo.jsstats.integra.fr/matomo.js https://stats.integra.fr/matomo.js — 200 — 66.3 KiB — 89 ms — http/1.1data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 32'%3E%3…www.w3.org/2000/svg' viewBox='0 0 3... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 32'%3E%3… — 200 — 0 B — 0 ms — datahttps://www.senat.fr/fileadmin/_processed_/d/b/csm_rebond-videotheque_39912737f1.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/d/b/csm_rebond-videotheque_39912737f1.webp — 200 — 16.4 KiB — 37 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/4/9/csm_rebond-audiotheque_645cd49a5d.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/4/9/csm_rebond-audiotheque_645cd49a5d.webp — 200 — 17.6 KiB — 34 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/b/3/csm_rebond_phototheque_ac32665c49.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/b/3/csm_rebond_phototheque_ac32665c49.webp — 200 — 25.1 KiB — 69 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/d/4/csm_rebond_archivesdusenat_f459b3a0b0.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/d/4/csm_rebond_archivesdusenat_f459b3a0b0.webp — 200 — 22.5 KiB — 147 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/8/6/csm_Senatoriales_2026_374ba0a8df.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/8/6/csm_Senatoriales_2026_374ba0a8df.webp — 200 — 18.2 KiB — 168 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/4/2/csm_e-petition_ad15231328.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/4/2/csm_e-petition_ad15231328.webp — 200 — 14.0 KiB — 177 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBold.woff2?0a5c133db8db023b7e79c8ea84964542www.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/OpenSans-SemiBold.woff2?0a5c133db8db023b7e79c8ea84964542 — 200 — 58.5 KiB — 67 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/fonts/vendor/bootstrap-icons/bootstrap-icons.woff2?92ea18a81d737146ff044ddb52010366www.senat.fr/_assets/cru-1776709016... 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https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/favicon.svg — 200 — 1.6 KiB — 25 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/icon-192.pngwww.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/icon-192.png — 200 — 3.7 KiB — 25 ms — http/1.1https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/favicon.icowww.senat.fr/_assets/cru-1776709016... https://www.senat.fr/_assets/cru-1776709016/eee83a27e1e6e241ed7098a5f815474c/Frontend/assets/static/senat/favicon.ico — 200 — 2.3 KiB — 24 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/8/6/csm_Senatoriales_2026_00b56dc8bb.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/8/6/csm_Senatoriales_2026_00b56dc8bb.webp — 200 — 18.1 KiB — 41 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/8/7/csm_evenements-senat_fe9aa1d049.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/8/7/csm_evenements-senat_fe9aa1d049.webp — 200 — 45.5 KiB — 38 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/6/9/csm_jardin-du-luxembourg_65264f3260.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/6/9/csm_jardin-du-luxembourg_65264f3260.webp — 200 — 51.9 KiB — 38 ms — http/1.1https://www.senat.fr/fileadmin/_processed_/0/8/csm_palais-luxembourg_cd702506a4.webpwww.senat.fr/fileadmin/_processed_/... https://www.senat.fr/fileadmin/_processed_/0/8/csm_palais-luxembourg_cd702506a4.webp — 200 — 23.8 KiB — 37 ms — http/1.1
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 2255ms · 311KB · €24/mo
www.senat.fr
Other
Costly
Execution 736ms
Transfer 19 KB
Monthly Cost €8/mo
www.senat.fr
Other
Costly
Execution 559ms
Transfer 29 KB
Monthly Cost €6/mo
Unattributable
Other
Costly
Execution 451ms
Transfer 0 KB
Monthly Cost €5/mo
www.senat.fr
Other
Costly
Execution 393ms
Transfer 122 KB
Unused 69%
Monthly Cost €4/mo
www.senat.fr
Other
Optional
Execution 60ms
Transfer 74 KB
Monthly Cost €1/mo
stats.integra.fr
Other
Optional
Execution 55ms
Transfer 66 KB
Unused 59%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.senat.fr adds 736ms and costs ~€8/month
  • www.senat.fr adds 559ms and costs ~€6/month
  • Unattributable adds 451ms and costs ~€5/month
  • www.senat.fr adds 393ms and costs ~€4/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.senat.fr takes 736ms 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

www.senat.fr takes 559ms 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

Unattributable takes 451ms 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

www.senat.fr takes 393ms 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

69% of www.senat.fr'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

59% of stats.integra.fr'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

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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