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https://rfi.fr

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
56
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.

2.67 s

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

6.52 s

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

646 ms

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

0.002

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

3.16 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.

8.83 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
2788ms total JS execution
FIX
2788ms total JS execution
Warning::
https://www.rfi.fr/en/: 664ms CPU time
Warning::
Unattributable: 595ms CPU time
Warning::
https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a...: 567ms CPU time
Warning::
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b...: 297ms CPU time
Info::
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b...: 181ms CPU time
Warning::
Third-party scripts: 2788ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 19% Style & Layout 12% Script Parsing & Compilation 9% Garbage Collection 4% Rendering 3% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.rfi.fr/en/664ms60ms14ms3rd
Unattributable595ms172ms0ms3rd
https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a4f1.js567ms484ms14ms3rd
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js297ms233ms47ms3rd
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-en-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js181ms73ms18ms3rd
https://tms.fmm.io/rfi/en.js160ms127ms32ms3rd
https://www.rfi.fr/build/js/vendor.fe035a7ee0b8e930a4f1.js146ms98ms47ms3rd
https://www.rfi.fr/build/8338.0ad5585de4639ec949c1.js65ms60ms5ms3rd
https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.fr59ms9ms49ms3rd
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/gpp-library.22ecd6bfac93de604efec0b75b2c796ee1675f92.js55ms36ms9ms3rd
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, 44 requests
REVIEW
1.2 MB transferred, 44 requests
Info::
Page weighs 3.8 MB (1.2 MB transferred)
Warning::
JavaScript is 810 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 810 KB
Info::
44 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
44 requests
0.24 g CO2 per page load
JavaScript 810.0 KiB 69%
HTML 127.0 KiB 11%
Images 109.8 KiB 9%
Other 50.0 KiB 4%
Fonts 47.5 KiB 4%
CSS 36.7 KiB 3%
Other 718 B 0%
Other 385 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
16 scripts, 294 KB unused
REVIEW
16 scripts, 294 KB unused
Warning::
https://www.rfi.fr/build/js/vendor.fe035a7ee0b8e93...: 98 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.rfi.fr/build/4974.b74e6af5102305c47a68...: 49 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b...: 43 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://tms.fmm.io/rfi/en.js: 37 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.rfi.fr/build/2090.bd7767c7453dc622c0e8...: 37 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 294 KB
294 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.rfi.fr/build/js/vendor.fe035a7ee0b8e930a4f1.js206 KB98 KB (47%)✓3rd
https://www.rfi.fr/build/4974.b74e6af5102305c47a68.js60 KB49 KB (82%)✓3rd
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js101 KB43 KB (42%)✓3rd
https://tms.fmm.io/rfi/en.js65 KB37 KB (58%)✓3rd
https://www.rfi.fr/build/2090.bd7767c7453dc622c0e8.js37 KB37 KB (100%)✓3rd
https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a4f1.js55 KB31 KB (57%)✓3rd
https://www.rfi.fr/build/1603.d4d6c00232cfdb05297f.js7 KB—✓3rd
https://www.rfi.fr/build/8338.0ad5585de4639ec949c1.js20 KB—✓3rd
https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.fr160 KB—✓3rd
https://www.rfi.fr/build/5884.d47599358aae88a22d93.js7 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

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
44 resources · 1.2 MB · 294 KB savings available
REVIEW
44 resources · 1.2 MB · 294 KB savings available
Warning::
Page weight 158 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~294 KB of savings available
Warning::
43 third-party resources (100% of weight)
Info::
1 resources over 200KB
44 resources · 1.2 MiB · 43 third-party 158.1 KiB over 1MB target
JavaScript 69% · 810.0 KiB
Image 14% · 159.6 KiB
Document 11% · 127.1 KiB
Font 4% · 47.5 KiB
CSS 3% · 36.7 KiB
Other 0% · 1.2 KiB

~294.5 KiB of savings available

Remove unused JavaScript: 294.5 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
17 images, 0 KB saveable
PASS
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 110 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (48 KB)
PASS
1 fonts (48 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

48 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 4.0 s 5.0 s 6.0 s FCP 2.7 s LCP 6.5 shttps://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2inter_latin.640b10a7966... https://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 47.5 KiB — 25 ms — font-display: swap
inter_latin.640b10a7966... woff2 swap
Size 48 KB
Load time 25 ms
Start 139 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
44 requests over 943ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 2.7 s LCP 6.5 shttps://rfi.fr// https://rfi.fr/ — 301 — 78 B — 65 ms — h2https://www.rfi.fr/www.rfi.fr/ https://www.rfi.fr/ — 302 — 102 B — 24 ms — h2https://www.rfi.fr/en/www.rfi.fr/en/ https://www.rfi.fr/en/ — 200 — 127.0 KiB — 33 ms — h2https://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2www.rfi.fr/build/fonts/inter_latin.... https://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 200 — 47.5 KiB — 25 ms — h2https://www.rfi.fr/build/css/root.129c7baf82c9ab046d6d.csswww.rfi.fr/build/css/root.129c7baf8... https://www.rfi.fr/build/css/root.129c7baf82c9ab046d6d.css — 200 — 29.4 KiB — 17 ms — h2https://www.rfi.fr/build/css/page-builder.ee3d4cf98598c27c16e3.csswww.rfi.fr/build/css/page-builder.e... https://www.rfi.fr/build/css/page-builder.ee3d4cf98598c27c16e3.css — 200 — 7.3 KiB — 18 ms — h2https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:1024/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webps.rfi.fr/media/display/93935d64-21d... https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:1024/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webp — 200 — 32.3 KiB — 62 ms — h2https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.frconsent.fmm.io/495f718a-9d29-4830-9... https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.fr — 200 — 160.1 KiB — 218 ms — h2https://s.rfi.fr/media/display/46e9c87e-3d67-11f1-8474-005056bf30b7/w:388/p:16x9/000-A8EY7LG.webps.rfi.fr/media/display/46e9c87e-3d6... https://s.rfi.fr/media/display/46e9c87e-3d67-11f1-8474-005056bf30b7/w:388/p:16x9/000-A8EY7LG.webp — 200 — 8.8 KiB — 48 ms — h2https://s.rfi.fr/media/display/17abbc7a-3b6e-11f1-b625-005056a90284/w:388/p:16x9/2026-03-26T155646Z-1305981664-RC2CL7AHELD8-RTRMADP-3-XCORP-ADVERTISING-LAWSUIT.webps.rfi.fr/media/display/17abbc7a-3b6... https://s.rfi.fr/media/display/17abbc7a-3b6e-11f1-b625-005056a90284/w:388/p:16x9/2026-03-26T155646Z-1305981664-RC2CL7AHELD8-RTRMADP-3-XCORP-ADVERTISING-LAWSUIT.webp — 200 — 4.5 KiB — 44 ms — h2https://s.rfi.fr/media/display/f8e13ff2-17d4-11f1-8442-005056a97e36/w:388/p:16x9/AP25287402189332.webps.rfi.fr/media/display/f8e13ff2-17d... https://s.rfi.fr/media/display/f8e13ff2-17d4-11f1-8442-005056a97e36/w:388/p:16x9/AP25287402189332.webp — 200 — 5.7 KiB — 47 ms — h2https://www.rfi.fr/build/js/vendor.fe035a7ee0b8e930a4f1.jswww.rfi.fr/build/js/vendor.fe035a7e... https://www.rfi.fr/build/js/vendor.fe035a7ee0b8e930a4f1.js — 200 — 206.4 KiB — 43 ms — h2https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a4f1.jswww.rfi.fr/build/js/main.fe035a7ee0... https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a4f1.js — 200 — 54.8 KiB — 47 ms — h2https://tms.fmm.io/rfi/en.jstms.fmm.io/rfi/en.js https://tms.fmm.io/rfi/en.js — 200 — 64.9 KiB — 14 ms — h2https://www.rfi.fr/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svgwww.rfi.fr/build/images/svg/sprite.... https://www.rfi.fr/build/images/svg/sprite.c98bf387c90bc4a87186b0b783f15ba0.svg — 200 — 41.5 KiB — 42 ms — h2data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 60 60"><path …www.w3.org/2000/svg" viewBox="0 0 6... data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 60 60"><path … — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" width="13" height="14" vie…www.w3.org/2000/svg" width="13" hei... data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" width="13" height="14" vie… — 200 — 0 B — 0 ms — datahttps://s.rfi.fr/media/display/2bb6f6d8-2eaa-11f1-bc2c-005056a90284/w:388/p:16x9/000-98LX6ZT-1.webps.rfi.fr/media/display/2bb6f6d8-2ea... https://s.rfi.fr/media/display/2bb6f6d8-2eaa-11f1-bc2c-005056a90284/w:388/p:16x9/000-98LX6ZT-1.webp — 200 — 16.7 KiB — 4 ms — h2https://s.rfi.fr/media/display/56de4834-3d50-11f1-8e1e-005056a90284/w:388/p:16x9/2026-04-15T064120Z-47108453-RC2GPKALC38G-RTRMADP-3-ISRAEL-PALESTINIANS-GAZA.webps.rfi.fr/media/display/56de4834-3d5... https://s.rfi.fr/media/display/56de4834-3d50-11f1-8e1e-005056a90284/w:388/p:16x9/2026-04-15T064120Z-47108453-RC2GPKALC38G-RTRMADP-3-ISRAEL-PALESTINIANS-GAZA.webp — 200 — 19.2 KiB — 5 ms — h2https://s.rfi.fr/media/display/0a5a3110-e9a3-11ee-b8fe-005056a90284/w:388/p:16x9/2024-03-21T173453Z_440145725_RC2KZQ9A06JN_RTRMADP_3_FRANCE-GUADELOUPE-WATER.webps.rfi.fr/media/display/0a5a3110-e9a... https://s.rfi.fr/media/display/0a5a3110-e9a3-11ee-b8fe-005056a90284/w:388/p:16x9/2024-03-21T173453Z_440145725_RC2KZQ9A06JN_RTRMADP_3_FRANCE-GUADELOUPE-WATER.webp — 200 — 21.4 KiB — 5 ms — h2https://www.rfi.fr/en/site.manifestwww.rfi.fr/en/site.manifest https://www.rfi.fr/en/site.manifest — 200 — 718 B — 22 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.rfi.fr/en/_ws/urgentwww.rfi.fr/en/_ws/urgent https://www.rfi.fr/en/_ws/urgent — 200 — 385 B — 37 ms — h2https://www.rfi.fr/build/4974.b74e6af5102305c47a68.jswww.rfi.fr/build/4974.b74e6af510230... https://www.rfi.fr/build/4974.b74e6af5102305c47a68.js — 200 — 59.9 KiB — 22 ms — h2https://www.rfi.fr/build/6990.e5870108679a98096891.jswww.rfi.fr/build/6990.e5870108679a9... https://www.rfi.fr/build/6990.e5870108679a98096891.js — 200 — 4.1 KiB — 27 ms — h2https://www.rfi.fr/build/8338.0ad5585de4639ec949c1.jswww.rfi.fr/build/8338.0ad5585de4639... https://www.rfi.fr/build/8338.0ad5585de4639ec949c1.js — 200 — 19.7 KiB — 27 ms — h2https://www.rfi.fr/build/2090.bd7767c7453dc622c0e8.jswww.rfi.fr/build/2090.bd7767c7453dc... https://www.rfi.fr/build/2090.bd7767c7453dc622c0e8.js — 200 — 36.8 KiB — 31 ms — h2https://www.rfi.fr/build/1603.d4d6c00232cfdb05297f.jswww.rfi.fr/build/1603.d4d6c00232cfd... https://www.rfi.fr/build/1603.d4d6c00232cfdb05297f.js — 200 — 6.6 KiB — 28 ms — h2https://www.rfi.fr/build/5884.d47599358aae88a22d93.jswww.rfi.fr/build/5884.d47599358aae8... https://www.rfi.fr/build/5884.d47599358aae88a22d93.js — 200 — 6.6 KiB — 28 ms — h2data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA=data:image/webp;base64,UklGRiQAAABX... data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAwA0JaQAA3AA/vuUAAA= — 200 — 0 B — 0 ms — data
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 2.7 s LCP 6.5 shttps://rfi.fr// https://rfi.fr/ — 301 — 78 B — 65 ms — h2https://www.rfi.fr/www.rfi.fr/ https://www.rfi.fr/ — 302 — 102 B — 24 ms — h2https://www.rfi.fr/en/www.rfi.fr/en/ https://www.rfi.fr/en/ — 200 — 127.0 KiB — 33 ms — h2https://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2www.rfi.fr/build/fonts/inter_latin.... https://www.rfi.fr/build/fonts/inter_latin.640b10a7966d94927c2ec64a71918e48.woff2 — 200 — 47.5 KiB — 25 ms — h2https://www.rfi.fr/build/css/root.129c7baf82c9ab046d6d.csswww.rfi.fr/build/css/root.129c7baf8... https://www.rfi.fr/build/css/root.129c7baf82c9ab046d6d.css — 200 — 29.4 KiB — 17 ms — h2https://www.rfi.fr/build/css/page-builder.ee3d4cf98598c27c16e3.csswww.rfi.fr/build/css/page-builder.e... https://www.rfi.fr/build/css/page-builder.ee3d4cf98598c27c16e3.css — 200 — 7.3 KiB — 18 ms — h2https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:1024/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webps.rfi.fr/media/display/93935d64-21d... https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:1024/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webp — 200 — 32.3 KiB — 62 ms — h2https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.frconsent.fmm.io/495f718a-9d29-4830-9... https://consent.fmm.io/495f718a-9d29-4830-96dc-6035928a6362/loader.js?target=www.rfi.fr — 200 — 160.1 KiB — 218 ms — h2https://s.rfi.fr/media/display/46e9c87e-3d67-11f1-8474-005056bf30b7/w:388/p:16x9/000-A8EY7LG.webps.rfi.fr/media/display/46e9c87e-3d6... https://s.rfi.fr/media/display/46e9c87e-3d67-11f1-8474-005056bf30b7/w:388/p:16x9/000-A8EY7LG.webp — 200 — 8.8 KiB — 48 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 2788ms · 804KB · €30/mo
www.rfi.fr
Other
Costly
Execution 664ms
Transfer 127 KB
Monthly Cost €7/mo
Unattributable
Other
Costly
Execution 595ms
Transfer 0 KB
Monthly Cost €6/mo
www.rfi.fr
Other
Costly
Execution 567ms
Transfer 55 KB
Unused 57%
Monthly Cost €6/mo
consent.fmm.io
Other
Costly
Execution 297ms
Transfer 101 KB
Unused 42%
Monthly Cost €3/mo
consent.fmm.io
Other
Optional
Execution 181ms
Transfer 53 KB
Monthly Cost €2/mo
tms.fmm.io
Other
Optional
Execution 160ms
Transfer 65 KB
Unused 58%
Monthly Cost €2/mo
www.rfi.fr
Other
Optional
Execution 146ms
Transfer 206 KB
Unused 47%
Monthly Cost €2/mo
www.rfi.fr
Other
Optional
Execution 65ms
Transfer 20 KB
Monthly Cost €1/mo
consent.fmm.io
Other
Optional
Execution 59ms
Transfer 160 KB
Monthly Cost €1/mo
consent.fmm.io
Other
Optional
Execution 55ms
Transfer 17 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.rfi.fr adds 664ms and costs ~€7/month
  • Unattributable adds 595ms and costs ~€6/month
  • www.rfi.fr adds 567ms and costs ~€6/month
  • consent.fmm.io adds 297ms and costs ~€3/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.rfi.fr takes 664ms 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 595ms 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.rfi.fr takes 567ms 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

57% of www.rfi.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

consent.fmm.io takes 297ms 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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