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https://rfi.fr

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.

581 ms

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

1.04 s

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

17 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.

875 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.55 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
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 (1.2 MiB of 1.2 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
1.2 MB transferred, 47 requests
REVIEW
1.2 MB transferred, 47 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::
47 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
47 requests
0.25 g CO2 per page load
JavaScript 810.0 KiB 67%
Images 138.7 KiB 11%
HTML 127.0 KiB 10%
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

B
JS Execution Cost
503ms total JS execution
REVIEW
503ms total JS execution
Info::
https://www.rfi.fr/en/: 166ms CPU time
Info::
https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a...: 134ms CPU time
Info::
Unattributable: 132ms CPU time
Info::
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b...: 71ms CPU time
Warning::
Third-party scripts: 503ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 17% Style & Layout 13% Script Parsing & Compilation 9% Parse HTML & CSS 4% Garbage Collection 3% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.rfi.fr/en/166ms17ms4ms3rd
https://www.rfi.fr/build/js/main.fe035a7ee0b8e930a4f1.js134ms120ms3ms3rd
Unattributable132ms34ms0ms3rd
https://consent.fmm.io/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js71ms56ms12ms3rd
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
47 resources · 1.2 MB · 294 KB savings available
REVIEW
47 resources · 1.2 MB · 294 KB savings available
Warning::
Page weight 187 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~294 KB of savings available
Warning::
46 third-party resources (100% of weight)
Info::
1 resources over 200KB
47 resources · 1.2 MiB · 46 third-party 187.0 KiB over 1MB target
JavaScript 67% · 810.0 KiB
Image 16% · 188.6 KiB
Document 10% · 127.0 KiB
Font 4% · 47.5 KiB
CSS 3% · 36.7 KiB
Other 0% · 1.2 KiB

~294.4 KiB of savings available

Remove unused JavaScript: 294.4 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 139 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 500 ms 1.0 s FCP 581 ms LCP 1.0 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 — 20 ms — font-display: swap
inter_latin.640b10a7966... woff2 swap
Size 48 KB
Load time 20 ms
Start 134 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
47 requests over 862ms
INFO
0 ms 500 ms 1.0 s FCP 581 ms LCP 1.0 shttps://rfi.fr// https://rfi.fr/ — 301 — 78 B — 47 ms — h2https://www.rfi.fr/www.rfi.fr/ https://www.rfi.fr/ — 302 — 102 B — 51 ms — h2https://www.rfi.fr/en/www.rfi.fr/en/ https://www.rfi.fr/en/ — 200 — 127.0 KiB — 17 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 — 20 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 — 16 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 — 17 ms — h2https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:720/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:720/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webp — 200 — 20.6 KiB — 27 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 — 188 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 — 3 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 — 3 ms — h2https://www.rfi.fr/en/site.manifestwww.rfi.fr/en/site.manifest https://www.rfi.fr/en/site.manifest — 200 — 718 B — 46 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 — 16 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 — 26 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 — 24 ms — h2https://tms.fmm.io/rfi/en.jstms.fmm.io/rfi/en.js https://tms.fmm.io/rfi/en.js — 200 — 64.9 KiB — 8 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 — 23 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 — 5 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 — 13 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 — 15 ms — h2https://s.rfi.fr/media/display/4d858e40-3991-11f1-8230-005056a90284/w:388/p:16x9/1-Pyramides-de-M%C3%A9ro%C3%A9-SOUDAN-Faiza-Drici.webps.rfi.fr/media/display/4d858e40-399... https://s.rfi.fr/media/display/4d858e40-3991-11f1-8230-005056a90284/w:388/p:16x9/1-Pyramides-de-M%C3%A9ro%C3%A9-SOUDAN-Faiza-Drici.webp — 200 — 11.9 KiB — 13 ms — h2https://s.rfi.fr/media/display/86f884a8-3f82-11ef-a62f-005056bfb2b6/w:388/p:16x9/2024-06-26T080136Z_4560531_RC25F8ADP955_RTRMADP_3_FRANCE-ELECTION-JEWS.webps.rfi.fr/media/display/86f884a8-3f8... https://s.rfi.fr/media/display/86f884a8-3f82-11ef-a62f-005056bfb2b6/w:388/p:16x9/2024-06-26T080136Z_4560531_RC25F8ADP955_RTRMADP_3_FRANCE-ELECTION-JEWS.webp — 200 — 15.3 KiB — 11 ms — h2https://s.rfi.fr/media/display/3897e9c0-3990-11f1-8536-005056a90284/w:388/p:16x9/52c-Statue-de-la-Liberte-01.webps.rfi.fr/media/display/3897e9c0-399... https://s.rfi.fr/media/display/3897e9c0-3990-11f1-8536-005056a90284/w:388/p:16x9/52c-Statue-de-la-Liberte-01.webp — 200 — 13.4 KiB — 12 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 — 16 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 — 18 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 — 39 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 — 40 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 — 44 ms — h2
0 ms 500 ms 1.0 s FCP 581 ms LCP 1.0 shttps://rfi.fr// https://rfi.fr/ — 301 — 78 B — 47 ms — h2https://www.rfi.fr/www.rfi.fr/ https://www.rfi.fr/ — 302 — 102 B — 51 ms — h2https://www.rfi.fr/en/www.rfi.fr/en/ https://www.rfi.fr/en/ — 200 — 127.0 KiB — 17 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 — 20 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 — 16 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 — 17 ms — h2https://s.rfi.fr/media/display/93935d64-21df-11f1-afb9-005056a90284/w:720/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:720/p:16x9/2026-03-03T110653Z-1797884382-RC2X4GAVW8XM-RTRMADP-3-UKRAINE-CRISIS-EU-ENLARGEMENT.webp — 200 — 20.6 KiB — 27 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 — 188 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 — 3 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 503ms · 283KB · €5/mo
www.rfi.fr
Other
Optional
Execution 166ms
Transfer 127 KB
Monthly Cost €2/mo
www.rfi.fr
Other
Optional
Execution 134ms
Transfer 55 KB
Unused 57%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 132ms
Transfer 0 KB
Monthly Cost €1/mo
consent.fmm.io
Other
Optional
Execution 71ms
Transfer 101 KB
Unused 42%
Monthly Cost €1/mo

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

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

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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