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https://france24.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
77
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.

2.43 s

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

3.63 s

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

376 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.

3.15 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.

8.55 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 4 REVIEW 3 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 (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3246ms total JS execution
FIX
3246ms total JS execution
Warning::
https://www.france24.com/en/: 872ms CPU time
Warning::
https://www.france24.com/build/js/main.888681600e0...: 754ms CPU time
Warning::
Unattributable: 543ms CPU time
Warning::
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e051...: 298ms CPU time
Info::
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e051...: 246ms CPU time
Warning::
Third-party scripts: 3246ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 17% Style & Layout 15% Script Parsing & Compilation 7% Rendering 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.france24.com/en/872ms72ms11ms3rd
https://www.france24.com/build/js/main.888681600e07828a60a8.js754ms658ms11ms3rd
Unattributable543ms155ms0ms3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js298ms236ms44ms3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/ui-web-en-web.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js246ms95ms23ms3rd
https://tms.fmm.io/f24/en.js174ms154ms15ms3rd
https://www.france24.com/build/js/vendor.888681600e07828a60a8.js172ms104ms48ms3rd
https://www.france24.com/build/5236.cc88ad4ad2c9d7a7f1aa.js74ms65ms5ms3rd
https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.france24.com61ms10ms51ms3rd
https://consent.fmm.io/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/gpp-library.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js52ms41ms11ms3rd
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
1.2 MB transferred, 45 requests
REVIEW
1.2 MB transferred, 45 requests
Info::
Page weighs 3.9 MB (1.2 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::
45 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
45 requests
0.25 g CO2 per page load
JavaScript 756.1 KiB 62%
Images 227.4 KiB 19%
HTML 99.1 KiB 8%
Other 49.4 KiB 4%
Fonts 47.3 KiB 4%
CSS 30.4 KiB 3%
Other 461 B 0%
Other 128 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

C
JS Bundles
Action
13 scripts, 201 KB unused
REVIEW
13 scripts, 201 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...: 43 KB unused (42%)
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: 201 KB
201 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 KB43 KB (42%)✓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
45 resources · 1.2 MB · 201 KB savings available
REVIEW
45 resources · 1.2 MB · 201 KB savings available
Warning::
Page weight 186 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~201 KB of savings available
Warning::
44 third-party resources (100% of weight)
Info::
1 resources over 200KB
45 resources · 1.2 MiB · 44 third-party 186.4 KiB over 1MB target
JavaScript 62% · 756.1 KiB
Image 23% · 276.4 KiB
Document 8% · 99.2 KiB
Font 4% · 47.3 KiB
CSS 3% · 30.4 KiB
Other 0% · 896 B

~201.2 KiB of savings available

Remove unused JavaScript: 201.2 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
19 images, 0 KB saveable
PASS
19 images, 0 KB saveable
Info::
All images are well-optimized
19 images 227 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 1.0 s 2.0 s 3.0 s FCP 2.4 s LCP 3.6 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 — 13 ms — font-display: swap
inter_latin.640b10a7966... woff2 swap
Size 47 KB
Load time 13 ms
Start 104 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
1
preload
3
dns-prefetch
—
prefetch
—

4 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
Network Waterfall
45 requests over 960ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.4 s LCP 3.6 shttps://france24.com// https://france24.com/ — 301 — 82 B — 23 ms — h2https://www.france24.com/www.france24.com/ https://www.france24.com/ — 302 — 307 B — 24 ms — h2https://www.france24.com/en/www.france24.com/en/ https://www.france24.com/en/ — 200 — 99.1 KiB — 50 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 — 13 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 — 22.5 KiB — 26 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 — 22 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 — 44 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 — 154 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 — 17 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 — 23 ms — h3https://tms.fmm.io/f24/en.jstms.fmm.io/f24/en.js https://tms.fmm.io/f24/en.js — 200 — 65.4 KiB — 45 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 — 16 ms — h3https://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 — 16 ms — h2https://s.france24.com/media/display/58065fc6-051f-11f1-8ae8-005056a90284/w:720/p:16x9/Capture-217.webps.france24.com/media/display/58065f... https://s.france24.com/media/display/58065fc6-051f-11f1-8ae8-005056a90284/w:720/p:16x9/Capture-217.webp — 200 — 15.6 KiB — 18 ms — h2https://s.france24.com/media/display/16dde1c0-38e8-11f1-a872-005056a97e36/w:720/p:16x9/AP26103010284349.webps.france24.com/media/display/16dde1... https://s.france24.com/media/display/16dde1c0-38e8-11f1-a872-005056a97e36/w:720/p:16x9/AP26103010284349.webp — 200 — 18.6 KiB — 20 ms — h2https://s.france24.com/media/display/4ac4fa8c-38ed-11f1-a918-005056bfb2b6/w:720/p:16x9/e5106f32f19498a117639877c613020deaca9991.webps.france24.com/media/display/4ac4fa... https://s.france24.com/media/display/4ac4fa8c-38ed-11f1-a918-005056bfb2b6/w:720/p:16x9/e5106f32f19498a117639877c613020deaca9991.webp — 200 — 32.9 KiB — 21 ms — h2https://s.france24.com/media/display/4d1ad026-3911-11f1-8964-005056bf30b7/w:720/p:16x9/c49f8e6d6e605ce120d0fee99e9350f29d411cf8.webps.france24.com/media/display/4d1ad0... https://s.france24.com/media/display/4d1ad026-3911-11f1-8964-005056bf30b7/w:720/p:16x9/c49f8e6d6e605ce120d0fee99e9350f29d411cf8.webp — 200 — 22.4 KiB — 24 ms — h2https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:720/p:16x9/000-A7X46ZC.webps.france24.com/media/display/d1579f... https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:720/p:16x9/000-A7X46ZC.webp — 200 — 31.3 KiB — 25 ms — h2https://www.france24.com/en/site.manifestwww.france24.com/en/site.manifest https://www.france24.com/en/site.manifest — 200 — 461 B — 21 ms — h3https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:720/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webps.france24.com/media/display/5c3668... https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:720/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webp — 200 — 35.6 KiB — 11 ms — h2data: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="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 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 — 14 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 — 15 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 — 22 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 — 10 ms — h3data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA=data:image/webp;base64,UklGRiQAAABX... data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA= — 200 — 0 B — 0 ms — datadata:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAABBxAR/Q9ERP8DAABWUDggGAAA…data:image/webp;base64,UklGRkoAAABX... data:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAABBxAR/Q9ERP8DAABWUDggGAAA… — 200 — 0 B — 0 ms — data
0 ms 1.0 s 2.0 s 3.0 s FCP 2.4 s LCP 3.6 shttps://france24.com// https://france24.com/ — 301 — 82 B — 23 ms — h2https://www.france24.com/www.france24.com/ https://www.france24.com/ — 302 — 307 B — 24 ms — h2https://www.france24.com/en/www.france24.com/en/ https://www.france24.com/en/ — 200 — 99.1 KiB — 50 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 — 13 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 — 22.5 KiB — 26 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 — 22 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 — 44 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 — 154 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 — 17 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 — 23 ms — h3https://tms.fmm.io/f24/en.jstms.fmm.io/f24/en.js 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h2https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:720/p:16x9/000-A7X46ZC.webps.france24.com/media/display/d1579f... https://s.france24.com/media/display/d1579f5c-38eb-11f1-a746-005056a90284/w:720/p:16x9/000-A7X46ZC.webp — 200 — 31.3 KiB — 25 ms — h2https://www.france24.com/en/site.manifestwww.france24.com/en/site.manifest https://www.france24.com/en/site.manifest — 200 — 461 B — 21 ms — h3https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:720/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webps.france24.com/media/display/5c3668... https://s.france24.com/media/display/5c3668c0-38c3-11f1-b864-005056a90284/w:720/p:16x9/34531c7ce058632741c5ead8464f4df0efdb7db7.webp — 200 — 35.6 KiB — 11 ms — h2data: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 — 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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 3246ms · 783KB · €9/mo
www.france24.com
Other
Costly
Execution 872ms
Transfer 99 KB
Monthly Cost €2/mo
www.france24.com
Other
Costly
Execution 754ms
Transfer 36 KB
Monthly Cost €2/mo
Unattributable
Other
Costly
Execution 543ms
Transfer 0 KB
Monthly Cost €1/mo
consent.fmm.io
Other
Costly
Execution 298ms
Transfer 101 KB
Unused 42%
Monthly Cost €1/mo
consent.fmm.io
Other
Costly
Execution 246ms
Transfer 53 KB
Monthly Cost €1/mo
tms.fmm.io
Other
Optional
Execution 174ms
Transfer 65 KB
Unused 58%
Monthly Cost €0/mo
www.france24.com
Other
Optional
Execution 172ms
Transfer 176 KB
Unused 47%
Monthly Cost €0/mo
www.france24.com
Other
Optional
Execution 74ms
Transfer 16 KB
Monthly Cost €0/mo
consent.fmm.io
Other
Optional
Execution 61ms
Transfer 218 KB
Monthly Cost €0/mo
consent.fmm.io
Other
Optional
Execution 52ms
Transfer 18 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.france24.com adds 872ms and costs ~€2/month
  • www.france24.com adds 754ms and costs ~€2/month
  • Unattributable adds 543ms and costs ~€1/month
  • consent.fmm.io adds 298ms and costs ~€1/month
  • consent.fmm.io adds 246ms 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 872ms 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 754ms 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 543ms 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

consent.fmm.io takes 298ms 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

consent.fmm.io takes 246ms 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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