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https://france24.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.

574 ms

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

1.03 s

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

48 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.

1.07 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.

1.53 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
15
6 PASS 5 REVIEW 2 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 (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
Page Weight Budget
1.1 MB transferred, 48 requests
REVIEW
1.1 MB transferred, 48 requests
Info::
Page weighs 3.9 MB (1.1 MB transferred)
Warning::
JavaScript is 756 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 756 KB
Info::
48 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
48 requests
0.24 g CO2 per page load
JavaScript 756.1 KiB 66%
Images 167.4 KiB 15%
HTML 98.6 KiB 9%
Other 49.3 KiB 4%
Fonts 47.3 KiB 4%
CSS 30.5 KiB 3%
Other 739 B 0%
Other 461 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under 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

B
JS Execution Cost
897ms total JS execution
REVIEW
897ms total JS execution
Info::
https://www.france24.com/build/js/main.888681600e0...: 247ms CPU time
Info::
https://www.france24.com/en/: 240ms CPU time
Info::
Unattributable: 163ms CPU time
Info::
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e051...: 80ms CPU time
Info::
https://tms.fmm.io/f24/en.js: 62ms CPU time
Warning::
Third-party scripts: 897ms (100% of total)

Main Thread Breakdown

Script Evaluation 51% Other 18% Style & Layout 14% Script Parsing & Compilation 7% Parse HTML & CSS 4% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.france24.com/build/js/main.888681600e07828a60a8.js247ms217ms3ms3rd
https://www.france24.com/en/240ms18ms5ms3rd
Unattributable163ms36ms0ms3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js80ms65ms9ms3rd
https://tms.fmm.io/f24/en.js62ms51ms6ms3rd
https://www.france24.com/build/js/vendor.888681600e07828a60a8.js52ms31ms14ms3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/ui-web-en-web.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js52ms25ms5ms3rd
C
JS Bundles
Action
13 scripts, 200 KB unused
REVIEW
13 scripts, 200 KB unused
Warning::
https://www.france24.com/build/js/vendor.888681600...: 82 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e051...: 42 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.france24.com/build/5351.1d4599263f000d...: 39 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://tms.fmm.io/f24/en.js: 38 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 200 KB
200 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.france24.com/build/js/vendor.888681600e07828a60a8.js176 KB82 KB (47%)✓3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js101 KB42 KB (41%)✓3rd
https://www.france24.com/build/5351.1d4599263f000dafb15e.js47 KB39 KB (82%)✓3rd
https://tms.fmm.io/f24/en.js65 KB38 KB (58%)✓3rd
https://www.france24.com/build/6804.71a90fbb18e330a7d63d.js6 KB—✓3rd
https://www.france24.com/build/5236.cc88ad4ad2c9d7a7f1aa.js16 KB—✓3rd
https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.com218 KB—✓3rd
https://www.france24.com/build/js/main.888681600e07828a60a8.js36 KB—✓3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/consent-string.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js16 KB—✓3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/src_sdk_core_modules_integrations_sdk-integrations_providers_google_google_js.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js1 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

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

B
Page Weight Inventory
48 resources · 1.1 MB · 200 KB savings available
REVIEW
48 resources · 1.1 MB · 200 KB savings available
Warning::
Page weight 126 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~200 KB of savings available
Warning::
47 third-party resources (100% of weight)
Info::
1 resources over 200KB
48 resources · 1.1 MiB · 47 third-party 126.5 KiB over 1MB target
JavaScript 66% · 756.1 KiB
Image 19% · 216.4 KiB
Document 9% · 98.7 KiB
Font 4% · 47.3 KiB
CSS 3% · 30.5 KiB
Other 0% · 1.4 KiB

~200.1 KiB of savings available

Remove unused JavaScript: 200.1 KiB
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
20 images, 0 KB saveable
PASS
20 images, 0 KB saveable
Info::
All images are well-optimized
20 images 167 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (47 KB)
PASS
1 fonts (47 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

47 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 574 ms LCP 1.0 shttps://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2inter_latin.640b10a7966... https://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 47.3 KiB — 32 ms — font-display: swap
inter_latin.640b10a7966... woff2 swap
Size 47 KB
Load time 32 ms
Start 129 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
Network Waterfall
48 requests over 1122ms
INFO
0 ms 500 ms 1.0 s FCP 574 ms LCP 1.0 shttps://france24.com// https://france24.com/ — 301 — 82 B — 34 ms — h2https://www.france24.com/www.france24.com/ https://www.france24.com/ — 302 — 258 B — 53 ms — h2https://www.france24.com/en/www.france24.com/en/ https://www.france24.com/en/ — 200 — 98.6 KiB — 20 ms — h2https://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2www.france24.com/build/fonts/inter_... https://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 200 — 47.3 KiB — 32 ms — h3https://www.france24.com/build/css/root.588dad1f50ec30ab9a1b.csswww.france24.com/build/css/root.588... https://www.france24.com/build/css/root.588dad1f50ec30ab9a1b.css — 200 — 22.6 KiB — 22 ms — h3https://www.france24.com/build/css/page-builder.9bea95cae901334d408d.csswww.france24.com/build/css/page-bui... https://www.france24.com/build/css/page-builder.9bea95cae901334d408d.css — 200 — 7.9 KiB — 26 ms — h3https://s.france24.com/media/display/dc9cc68e-3847-11f1-af04-005056bf30b7/w:1024/p:16x9/AP26104602906474.webps.france24.com/media/display/dc9cc6... https://s.france24.com/media/display/dc9cc68e-3847-11f1-af04-005056bf30b7/w:1024/p:16x9/AP26104602906474.webp — 200 — 42.3 KiB — 24 ms — h2https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.comconsent.fmm.io/495f718a-9d29-4830-9... https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.com — 200 — 218.3 KiB — 148 ms — h2https://www.france24.com/build/js/vendor.888681600e07828a60a8.jswww.france24.com/build/js/vendor.88... https://www.france24.com/build/js/vendor.888681600e07828a60a8.js — 200 — 176.3 KiB — 18 ms — h3https://www.france24.com/build/js/main.888681600e07828a60a8.jswww.france24.com/build/js/main.8886... https://www.france24.com/build/js/main.888681600e07828a60a8.js — 200 — 36.0 KiB — 25 ms — h3https://tms.fmm.io/f24/en.jstms.fmm.io/f24/en.js https://tms.fmm.io/f24/en.js — 200 — 65.4 KiB — 10 ms — h2https://www.france24.com/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svgwww.france24.com/build/images/svg/s... https://www.france24.com/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svg — 200 — 35.2 KiB — 25 ms — h3data:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa…www.w3.org/2000/svg"><pa… data:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,<svg width="24" height="24" fill="none" xmlns="http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,<svg width="24" height="24" fill="none" xmlns="http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa…www.w3.org/2000/svg"><pa… data:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa… — 200 — 0 B — 0 ms — datahttps://s.france24.com/media/display/65dcfdd8-38e3-11f1-9fff-005056a97e36/w:720/p:16x9/AP26105509892449.webps.france24.com/media/display/65dcfd... https://s.france24.com/media/display/65dcfdd8-38e3-11f1-9fff-005056a97e36/w:720/p:16x9/AP26105509892449.webp — 200 — 24.7 KiB — 7 ms — h2https://s.france24.com/media/display/58065fc6-051f-11f1-8ae8-005056a90284/w:388/p:16x9/Capture-217.webps.france24.com/media/display/58065f... https://s.france24.com/media/display/58065fc6-051f-11f1-8ae8-005056a90284/w:388/p:16x9/Capture-217.webp — 200 — 7.5 KiB — 9 ms — h2https://s.france24.com/media/display/16dde1c0-38e8-11f1-a872-005056a97e36/w:388/p:16x9/AP26103010284349.webps.france24.com/media/display/16dde1... https://s.france24.com/media/display/16dde1c0-38e8-11f1-a872-005056a97e36/w:388/p:16x9/AP26103010284349.webp — 200 — 8.4 KiB — 15 ms — h2https://s.france24.com/media/display/4ac4fa8c-38ed-11f1-a918-005056bfb2b6/w:388/p:16x9/e5106f32f19498a117639877c613020deaca9991.webps.france24.com/media/display/4ac4fa... https://s.france24.com/media/display/4ac4fa8c-38ed-11f1-a918-005056bfb2b6/w:388/p:16x9/e5106f32f19498a117639877c613020deaca9991.webp — 200 — 10.5 KiB — 16 ms — h2https://s.france24.com/media/display/4d1ad026-3911-11f1-8964-005056bf30b7/w:388/p:16x9/c49f8e6d6e605ce120d0fee99e9350f29d411cf8.webps.france24.com/media/display/4d1ad0... https://s.france24.com/media/display/4d1ad026-3911-11f1-8964-005056bf30b7/w:388/p:16x9/c49f8e6d6e605ce120d0fee99e9350f29d411cf8.webp — 200 — 10.5 KiB — 17 ms — h2https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:388/p:16x9/000-A7X46ZC.webps.france24.com/media/display/d1579f... https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:388/p:16x9/000-A7X46ZC.webp — 200 — 12.8 KiB — 19 ms — h2https://www.france24.com/en/site.manifestwww.france24.com/en/site.manifest https://www.france24.com/en/site.manifest — 200 — 461 B — 29 ms — h3https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:388/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webps.france24.com/media/display/5c3668... https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:388/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webp — 200 — 12.5 KiB — 14 ms — h2https://s.france24.com/media/display/e6279b3c-db08-11ee-b7f5-005056bf30b7/w:1024/p:16x9/news_en_1920x1080.webps.france24.com/media/display/e6279b... https://s.france24.com/media/display/e6279b3c-db08-11ee-b7f5-005056bf30b7/w:1024/p:16x9/news_en_1920x1080.webp — 200 — 34.3 KiB — 15 ms — h2data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="1384 -4061 42.997…www.w3.org/2000/svg" viewBox="1384 ... data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="1384 -4061 42.997… — 200 — 0 B — 0 ms — datahttps://www.france24.com/en/_ws/urgentwww.france24.com/en/_ws/urgent https://www.france24.com/en/_ws/urgent — 200 — 128 B — 13 ms — h3https://www.france24.com/build/5351.1d4599263f000dafb15e.jswww.france24.com/build/5351.1d45992... https://www.france24.com/build/5351.1d4599263f000dafb15e.js — 200 — 47.1 KiB — 14 ms — h3https://www.france24.com/build/5236.cc88ad4ad2c9d7a7f1aa.jswww.france24.com/build/5236.cc88ad4... https://www.france24.com/build/5236.cc88ad4ad2c9d7a7f1aa.js — 200 — 15.7 KiB — 25 ms — h3https://www.france24.com/build/6804.71a90fbb18e330a7d63d.jswww.france24.com/build/6804.71a90fb... https://www.france24.com/build/6804.71a90fbb18e330a7d63d.js — 200 — 6.2 KiB — 13 ms — h3data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA=data:image/webp;base64,UklGRiQAAABX... data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA= — 200 — 0 B — 0 ms — data
0 ms 500 ms 1.0 s FCP 574 ms LCP 1.0 shttps://france24.com// https://france24.com/ — 301 — 82 B — 34 ms — h2https://www.france24.com/www.france24.com/ https://www.france24.com/ — 302 — 258 B — 53 ms — h2https://www.france24.com/en/www.france24.com/en/ https://www.france24.com/en/ — 200 — 98.6 KiB — 20 ms — h2https://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2www.france24.com/build/fonts/inter_... https://www.france24.com/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 200 — 47.3 KiB — 32 ms — h3https://www.france24.com/build/css/root.588dad1f50ec30ab9a1b.csswww.france24.com/build/css/root.588... https://www.france24.com/build/css/root.588dad1f50ec30ab9a1b.css — 200 — 22.6 KiB — 22 ms — h3https://www.france24.com/build/css/page-builder.9bea95cae901334d408d.csswww.france24.com/build/css/page-bui... https://www.france24.com/build/css/page-builder.9bea95cae901334d408d.css — 200 — 7.9 KiB — 26 ms — h3https://s.france24.com/media/display/dc9cc68e-3847-11f1-af04-005056bf30b7/w:1024/p:16x9/AP26104602906474.webps.france24.com/media/display/dc9cc6... https://s.france24.com/media/display/dc9cc68e-3847-11f1-af04-005056bf30b7/w:1024/p:16x9/AP26104602906474.webp — 200 — 42.3 KiB — 24 ms — h2https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.comconsent.fmm.io/495f718a-9d29-4830-9... https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.com — 200 — 218.3 KiB — 148 ms — h2https://www.france24.com/build/js/vendor.888681600e07828a60a8.jswww.france24.com/build/js/vendor.88... https://www.france24.com/build/js/vendor.888681600e07828a60a8.js — 200 — 176.3 KiB — 18 ms — h3https://www.france24.com/build/js/main.888681600e07828a60a8.jswww.france24.com/build/js/main.8886... https://www.france24.com/build/js/main.888681600e07828a60a8.js — 200 — 36.0 KiB — 25 ms — h3https://tms.fmm.io/f24/en.jstms.fmm.io/f24/en.js https://tms.fmm.io/f24/en.js — 200 — 65.4 KiB — 10 ms — h2https://www.france24.com/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svgwww.france24.com/build/images/svg/s... https://www.france24.com/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svg — 200 — 35.2 KiB — 25 ms — h3data:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa…www.w3.org/2000/svg"><pa… data:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,<svg width="24" height="24" fill="none" xmlns="http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,<svg width="24" height="24" fill="none" xmlns="http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,<svg width="32" height="32" xmlns="http://www.w3.org/2000/svg"><pa…www.w3.org/2000/svg"><pa… data:image/svg+xml;charset=utf-8,<svg width="32" height="32" 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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 897ms · 531KB · €2/mo
www.france24.com
Other
Costly
Execution 247ms
Transfer 36 KB
Monthly Cost €1/mo
www.france24.com
Other
Costly
Execution 240ms
Transfer 99 KB
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 163ms
Transfer 0 KB
Monthly Cost €0/mo
consent.fmm.io
Other
Optional
Execution 80ms
Transfer 101 KB
Unused 41%
Monthly Cost €0/mo
tms.fmm.io
Other
Optional
Execution 62ms
Transfer 65 KB
Unused 58%
Monthly Cost €0/mo
www.france24.com
Other
Optional
Execution 52ms
Transfer 176 KB
Unused 47%
Monthly Cost €0/mo
consent.fmm.io
Other
Optional
Execution 52ms
Transfer 53 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.france24.com adds 247ms and costs ~€1/month
  • www.france24.com adds 240ms and costs ~€1/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.france24.com takes 247ms 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.france24.com takes 240ms 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

58% of tms.fmm.io'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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