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https://elysee.fr

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
2
PASS
8
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.
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.

6.40 s

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

39.36 s

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

140 ms

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

0.062

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

10.10 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.

41.89 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 2 REVIEW 5 FIX
F
Page Weight Budget
Action
12.2 MB transferred, 35 requests
FIX
12.2 MB transferred, 35 requests
Critical::
Page weighs 13.8 MB (12.2 MB transferred)
Warning::
Images are 11.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 11.2 MB
Info::
CSS is 612 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 612 KB
Info::
35 HTTP requests
Info::
Estimated 2.6 g CO2 per page load
12.2 MB / 2.4 MB budget
12.2 MB transferred
35 requests
2.6 g CO2 per page load
Images 11.2 MiB 91%
CSS 612.1 KiB 5%
JavaScript 264.1 KiB 2%
Fonts 163.9 KiB 1%
HTML 49.8 KiB 0%
Other 484 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

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

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 (12.2 MiB of 12.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
8 scripts, 158 KB unused
FIX
8 scripts, 158 KB unused
Warning::
https://www.elysee.fr/front/js/app.0e8307de.js: 131 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.elysee.fr/front/js/tarteaucitronjs/tar...: 27 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.elysee.fr/front/js/tarteaucitronjs/tar...: unminified — 10 KB could be saved
Warning::
https://www.elysee.fr/front/js/tarteaucitronjs/tar...: unminified — 7 KB could be saved
Info::
Total unused JavaScript: 158 KB
158 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.elysee.fr/front/js/app.0e8307de.js174 KB131 KB (75%)✓3rd
https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.services.js?v=2023020337 KB27 KB (72%)✗3rd
https://www.elysee.fr/bundles/bazingajstranslation/js/translator.min.js2 KB—✓3rd
https://www.elysee.fr/translations?locales=fr&version=v3.5.812 KB—✓3rd
https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.js21 KB—✗3rd
https://isho.elysee.fr/gtG690.js?214 KB—✓3rd
https://www.elysee.fr/front/js/tarteaucitronjs/lang/tarteaucitron.fr.js?v=202302031 KB—✓3rd
https://isho.elysee.fr/col586a/-/1575599844?page_template=accueil&sd=24&pggrp=accueil&site_type=standard&site_target=contenu&evariant=2-4&site_language=fr&pglbl=accueil&fra=0&segment-site=accueil&site_entity=Elysee&page_name=accueil&ss=412x823&url=https%3A%2F%2Fwww.elysee.fr%2F&2 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

D
Page Weight Inventory
Action
35 resources · 12.2 MB · 158 KB savings available
FIX
35 resources · 12.2 MB · 158 KB savings available
Warning::
Page weight 11.2 MB over 1MB target
Got: 12.2 MB Expected: ≤ 1 MB
Info::
~158 KB of savings available
Warning::
34 third-party resources (100% of weight)
Info::
14 resources over 200KB
35 resources · 12.2 MiB · 34 third-party 11.2 MiB over 1MB target
Image 91% · 11.2 MiB
CSS 5% · 612.1 KiB
JavaScript 2% · 264.1 KiB
Font 1% · 163.9 KiB
Document 0% · 49.8 KiB
Other 0% · 111 B

~157.8 KiB of savings available

Remove unused JavaScript: 157.8 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.

B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/format=auto%2C... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/dpr=2%2Cfit=co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elysee.fr/cdn-cgi/image/fit=cover%2Cfo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 11.2 MB
0 oversized -0 KB
2 legacy format
9 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

Performance issues directly impact user engagement and conversion rates.

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

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
1402ms total JS execution
REVIEW
1402ms total JS execution
Warning::
https://www.elysee.fr/: 505ms CPU time
Warning::
https://www.elysee.fr/front/js/app.0e8307de.js: 433ms CPU time
Warning::
Unattributable: 354ms CPU time
Info::
https://www.elysee.fr/front/js/tarteaucitronjs/tar...: 110ms CPU time
Warning::
Third-party scripts: 1402ms (100% of total)

Main Thread Breakdown

Other 46% Script Evaluation 20% Style & Layout 17% Parse HTML & CSS 7% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.elysee.fr/505ms21ms6ms3rd
https://www.elysee.fr/front/js/app.0e8307de.js433ms167ms52ms3rd
Unattributable354ms5ms0ms3rd
https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.js110ms79ms10ms3rd
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
3 fonts (164 KB)
PASS
3 fonts (164 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

164 KB total

Render-blocking

0

of 3

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 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s FCP 6.4 s LCP 39.4 sdata:font/woff2;charset=utf-8;base64,d09GMgABAAAAANrAAA8AAAACbigAANpcAAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…woff2;charset=utf-8;bas... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANrAAA8AAAACbigAANpcAAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 54.7 KiB — 56 ms — font-display: swapdata:font/woff2;charset=utf-8;base64,d09GMgABAAAAANsgAA8AAAACbsAAANq8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…woff2;charset=utf-8;bas... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANsgAA8AAAACbsAAANq8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 54.8 KiB — 58 ms — font-display: swapdata:font/woff2;charset=utf-8;base64,d09GMgABAAAAANngAA8AAAACcnwAANl8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…woff2;charset=utf-8;bas... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANngAA8AAAACcnwAANl8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 54.5 KiB — 60 ms — font-display: swap
woff2;charset=utf-8;bas... woff2 swap
Size 55 KB
Load time 56 ms
Start 336 ms
Risk FOUT — text flashes from fallback to web font
woff2;charset=utf-8;bas... woff2 swap
Size 55 KB
Load time 58 ms
Start 337 ms
Risk FOUT — text flashes from fallback to web font
woff2;charset=utf-8;bas... woff2 swap
Size 54 KB
Load time 60 ms
Start 338 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 resource hints configured

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: cegedim.cloud

Network Waterfall
35 requests over 1001ms
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 FCP 6.4 s LCP 39.4 shttps://elysee.fr// https://elysee.fr/ — 301 — 111 B — 65 ms — http/1.0https://www.elysee.fr/www.elysee.fr/ https://www.elysee.fr/ — 200 — 49.8 KiB — 100 ms — h2https://www.elysee.fr/front/css/fonts.03da62f5.csswww.elysee.fr/front/css/fonts.03da6... https://www.elysee.fr/front/css/fonts.03da62f5.css — 200 — 532.2 KiB — 85 ms — h2https://www.elysee.fr/front/css/app.5f5ea49d.csswww.elysee.fr/front/css/app.5f5ea49... https://www.elysee.fr/front/css/app.5f5ea49d.css — 200 — 74.9 KiB — 84 ms — h2https://www.elysee.fr/bundles/bazingajstranslation/js/translator.min.jswww.elysee.fr/bundles/bazingajstran... https://www.elysee.fr/bundles/bazingajstranslation/js/translator.min.js — 200 — 2.2 KiB — 33 ms — h2https://www.elysee.fr/translations?locales=fr&version=v3.5.8www.elysee.fr/translations?locales=... https://www.elysee.fr/translations?locales=fr&version=v3.5.8 — 200 — 11.7 KiB — 83 ms — h2https://www.elysee.fr/front/js/app.0e8307de.jswww.elysee.fr/front/js/app.0e8307de... https://www.elysee.fr/front/js/app.0e8307de.js — 200 — 174.0 KiB — 86 ms — h2https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.jswww.elysee.fr/front/js/tarteaucitro... https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.js — 200 — 20.9 KiB — 82 ms — h2https://www.elysee.fr/front/images/palais-w.f8a146b1.svgwww.elysee.fr/front/images/palais-w... https://www.elysee.fr/front/images/palais-w.f8a146b1.svg — 200 — 2.0 KiB — 32 ms — h2data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANrAAA8AAAACbigAANpcAAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…data:font/woff2;charset=utf-8;base6... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANrAAA8AAAACbigAANpcAAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 200 — 54.7 KiB — 56 ms — datadata:font/woff2;charset=utf-8;base64,d09GMgABAAAAANsgAA8AAAACbsAAANq8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…data:font/woff2;charset=utf-8;base6... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANsgAA8AAAACbsAAANq8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 200 — 54.8 KiB — 58 ms — datadata:font/woff2;charset=utf-8;base64,d09GMgABAAAAANngAA8AAAACcnwAANl8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA…data:font/woff2;charset=utf-8;base6... data:font/woff2;charset=utf-8;base64,d09GMgABAAAAANngAA8AAAACcnwAANl8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAA… — 200 — 54.5 KiB — 60 ms — datahttps://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=840%2Cheight=771%2Ctrim=344%3B0%3B451%3B0%2Cfit=cover/images/default/0001/19/144ddc3fb147fde8cee18d2deb4d40dbdd680357.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=840%2Cheight=771%2Ctrim=344%3B0%3B451%3B0%2Cfit=cover/images/default/0001/19/144ddc3fb147fde8cee18d2deb4d40dbdd680357.jpg — 200 — 1.0 MiB — 109 ms — h2https://www.elysee.fr/cdn-cgi/image/dpr=2%2Cfit=cover%2Cformat=auto%2Cquality=100%2Ctrim=0%3B0%3B0%3B297%2Cheight=140/images/default/0001/19/c2121db963efd6691f1a7b8e32189ceb42cb116c.jpgwww.elysee.fr/cdn-cgi/image/dpr=2%2... https://www.elysee.fr/cdn-cgi/image/dpr=2%2Cfit=cover%2Cformat=auto%2Cquality=100%2Ctrim=0%3B0%3B0%3B297%2Cheight=140/images/default/0001/19/c2121db963efd6691f1a7b8e32189ceb42cb116c.jpg — 200 — 268.4 KiB — 73 ms — h2https://www.elysee.fr/cdn-cgi/image/fit=cover%2Cformat=auto%2Cquality=100%2Cwidth=140%2Cheight=140%2Ctrim=0%3B0%3B59%3B0/images/default/0001/19/2ef8a8120e5c1dcc149644b30c32fea9dd17882b.pngwww.elysee.fr/cdn-cgi/image/fit=cov... https://www.elysee.fr/cdn-cgi/image/fit=cover%2Cformat=auto%2Cquality=100%2Cwidth=140%2Cheight=140%2Ctrim=0%3B0%3B59%3B0/images/default/0001/19/2ef8a8120e5c1dcc149644b30c32fea9dd17882b.png — 200 — 30.1 KiB — 62 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=640%2Cheight=332%2Ctrim=202%3B0%3B101%3B0%2Cfit=cover/images/default/0001/19/99489913b9125043ef0583af37f2fed113e4381b.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=640%2Cheight=332%2Ctrim=202%3B0%3B101%3B0%2Cfit=cover/images/default/0001/19/99489913b9125043ef0583af37f2fed113e4381b.jpg — 200 — 359.7 KiB — 91 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=640%2Cheight=332%2Ctrim=304%3B0%3B0%3B0%2Cfit=cover/images/default/0001/19/2a60430317cfcde91eff4d571b83388ff170b5ea.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=640%2Cheight=332%2Ctrim=304%3B0%3B0%3B0%2Cfit=cover/images/default/0001/19/2a60430317cfcde91eff4d571b83388ff170b5ea.jpg — 200 — 450.5 KiB — 109 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=448%3B0%3B98%3B0%2Cfit=cover/images/default/0001/16/f9a538720f73d55f6ea75db13f65f9e77d1884fe.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=448%3B0%3B98%3B0%2Cfit=cover/images/default/0001/16/f9a538720f73d55f6ea75db13f65f9e77d1884fe.jpg — 200 — 822.7 KiB — 129 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=404%3B0%3B142%3B0%2Cfit=cover/images/default/0001/16/48eda99aab9194ea879bc3ad8a37f0870fdc7266.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=404%3B0%3B142%3B0%2Cfit=cover/images/default/0001/16/48eda99aab9194ea879bc3ad8a37f0870fdc7266.jpg — 200 — 1.0 MiB — 156 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=317%3B0%3B229%3B0%2Cfit=cover/images/default/0001/16/fea4fee23a7cc6c84d6ce872e9883004bbfc674a.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=317%3B0%3B229%3B0%2Cfit=cover/images/default/0001/16/fea4fee23a7cc6c84d6ce872e9883004bbfc674a.jpg — 200 — 1.1 MiB — 178 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=543%3B0%3B3%3B0%2Cfit=cover/images/default/0001/16/3661adea638f898971174de7a212f2357617e47d.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=543%3B0%3B3%3B0%2Cfit=cover/images/default/0001/16/3661adea638f898971174de7a212f2357617e47d.jpg — 200 — 1.7 MiB — 224 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=265%3B0%3B281%3B0%2Cfit=cover/images/default/0001/16/01c1795f371630811b661473a423e0b8ead8c696.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=265%3B0%3B281%3B0%2Cfit=cover/images/default/0001/16/01c1795f371630811b661473a423e0b8ead8c696.jpg — 200 — 1.0 MiB — 238 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=250%3B0%3B296%3B0%2Cfit=cover/images/default/0001/17/2159aed9fead8bffe083dcc0dd904fda75ecd3cd.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=250%3B0%3B296%3B0%2Cfit=cover/images/default/0001/17/2159aed9fead8bffe083dcc0dd904fda75ecd3cd.jpg — 200 — 1.2 MiB — 256 ms — 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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 FCP 6.4 s LCP 39.4 shttps://elysee.fr// https://elysee.fr/ — 301 — 111 B — 65 ms — http/1.0https://www.elysee.fr/www.elysee.fr/ https://www.elysee.fr/ — 200 — 49.8 KiB — 100 ms — h2https://www.elysee.fr/front/css/fonts.03da62f5.csswww.elysee.fr/front/css/fonts.03da6... https://www.elysee.fr/front/css/fonts.03da62f5.css — 200 — 532.2 KiB — 85 ms — h2https://www.elysee.fr/front/css/app.5f5ea49d.csswww.elysee.fr/front/css/app.5f5ea49... https://www.elysee.fr/front/css/app.5f5ea49d.css — 200 — 74.9 KiB — 84 ms — h2https://www.elysee.fr/bundles/bazingajstranslation/js/translator.min.jswww.elysee.fr/bundles/bazingajstran... https://www.elysee.fr/bundles/bazingajstranslation/js/translator.min.js — 200 — 2.2 KiB — 33 ms — h2https://www.elysee.fr/translations?locales=fr&version=v3.5.8www.elysee.fr/translations?locales=... 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h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=920%3B1%3B622%3B0%2Cfit=cover/images/default/0001/17/f894ef2710eb222918673ce67f691c16b712afd0.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=1400%2Cheight=559%2Ctrim=920%3B1%3B622%3B0%2Cfit=cover/images/default/0001/17/f894ef2710eb222918673ce67f691c16b712afd0.jpg — 200 — 1.4 MiB — 298 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427/images/default/0001/13/5ef55cdf2fa5fa5ba36651cb03129f0208ccd6a6.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427/images/default/0001/13/5ef55cdf2fa5fa5ba36651cb03129f0208ccd6a6.jpg — 200 — 294.7 KiB — 280 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427%2Ctrim=18%3B30%3B2%3B24%2Cfit=cover/images/default/0001/13/59a0e8cf59b3e927e784a64f238295f429822f55.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427%2Ctrim=18%3B30%3B2%3B24%2Cfit=cover/images/default/0001/13/59a0e8cf59b3e927e784a64f238295f429822f55.jpg — 200 — 105.1 KiB — 280 ms — h2https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427/images/default/0001/13/35ec19a1e2d77a4e657b3317c51522223b7da8e6.jpgwww.elysee.fr/cdn-cgi/image/format=... https://www.elysee.fr/cdn-cgi/image/format=auto%2Cquality=100%2Cwidth=320%2Cheight=427/images/default/0001/13/35ec19a1e2d77a4e657b3317c51522223b7da8e6.jpg — 200 — 364.4 KiB — 292 ms — 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h2https://www.elysee.fr/front/js/tarteaucitronjs/lang/tarteaucitron.fr.js?v=20230203www.elysee.fr/front/js/tarteaucitro... https://www.elysee.fr/front/js/tarteaucitronjs/lang/tarteaucitron.fr.js?v=20230203 — 200 — 1.5 KiB — 30 ms — h2https://isho.elysee.fr/col586a/-/1575599844?page_template=accueil&sd=24&pggrp=accueil&site_type=standard&site_target=contenu&evariant=2-4&site_language=fr&pglbl=accueil&fra=0&segment-site=accueil&site_entity=Elysee&page_name=accueil&ss=412x823&url=https%3A%2F%2Fwww.elysee.fr%2F&isho.elysee.fr/col586a/-/1575599844... https://isho.elysee.fr/col586a/-/1575599844?page_template=accueil&sd=24&pggrp=accueil&site_type=standard&site_target=contenu&evariant=2-4&site_language=fr&pglbl=accueil&fra=0&segment-site=accueil&site_entity=Elysee&page_name=accueil&ss=412x823&url=https%3A%2F%2Fwww.elysee.fr%2F& — 200 — 2.5 KiB — 87 ms — http/1.1https://www.elysee.fr/front/images/favicon-32x32.9d32b752.pngwww.elysee.fr/front/images/favicon-... https://www.elysee.fr/front/images/favicon-32x32.9d32b752.png — 200 — 373 B — 28 ms — h2https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.services.js?v=20230203www.elysee.fr/front/js/tarteaucitro... https://www.elysee.fr/front/js/tarteaucitronjs/tarteaucitron.services.js?v=20230203 — 200 — 37.2 KiB — 27 ms — h2
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 1402ms · 245KB · €15/mo
www.elysee.fr
Other
Costly
Execution 505ms
Transfer 50 KB
Monthly Cost €5/mo
www.elysee.fr
Other
Costly
Execution 433ms
Transfer 174 KB
Unused 75%
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 354ms
Transfer 0 KB
Monthly Cost €4/mo
www.elysee.fr
Other
Optional
Execution 110ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.elysee.fr adds 505ms and costs ~€5/month
  • www.elysee.fr adds 433ms and costs ~€5/month
  • Unattributable adds 354ms 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.elysee.fr takes 505ms 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.elysee.fr takes 433ms 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

75% of www.elysee.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

Unattributable takes 354ms 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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