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https://arte.tv

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
4
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
39
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.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

3.54 s

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

6.49 s

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

2.46 s

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

0.015

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

4.72 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.

12.88 s

Page Load Progression

429 ms
859 ms
1.3 s
1.7 s
2.1 s
2.6 s
3.0 s
3.4 s
Checks
17
9 PASS 2 REVIEW 4 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 (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
8166ms total JS execution
FIX
8166ms total JS execution
Warning::
https://www.arte.tv/_next/static/chunks/0v0~yvem-0...: 4548ms CPU time
Warning::
https://www.arte.tv/en/: 1348ms CPU time
Warning::
Unattributable: 785ms CPU time
Warning::
https://www.arte.tv/_next/static/chunks/003e35da60...: 348ms CPU time
Warning::
https://www.arte.tv/_next/static/chunks/04hwo-0y3l...: 311ms CPU time
Warning::
Third-party scripts: 8166ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 13% Script Parsing & Compilation 12% Style & Layout 11% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.js4548ms4141ms113ms3rd
https://www.arte.tv/en/1348ms21ms27ms3rd
Unattributable785ms29ms0ms3rd
https://www.arte.tv/_next/static/chunks/003e35da60l_c.js348ms59ms259ms3rd
https://www.arte.tv/_next/static/chunks/04hwo-0y3l~yb.js311ms57ms253ms3rd
https://www.arte.tv/_next/static/chunks/05hcg9gy-4mo7.js308ms56ms46ms3rd
https://polyfill.arte.tv/polyfill/v3/polyfill.min.js?features=Element.prototype.scrollBy&version=4.8.0252ms250ms1ms3rd
https://www.arte.tv/_next/static/chunks/04s5omuefokmf.js139ms26ms64ms3rd
https://www.arte.tv/_next/static/chunks/turbopack-15j9fwpu75oc0.js75ms60ms9ms3rd
https://www.arte.tv/static/design-system/scripts/bowser@2.11.0.js52ms34ms16ms3rd
D
JS Bundles
Action
46 scripts, 359 KB unused
FIX
46 scripts, 359 KB unused
Warning::
https://www.arte.tv/_next/static/chunks/003e35da60...: 85 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.arte.tv/_next/static/chunks/003e35da60...: 85 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.arte.tv/_next/static/chunks/04hwo-0y3l...: 52 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.arte.tv/_next/static/chunks/04hwo-0y3l...: 52 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.arte.tv/_next/static/chunks/04s5omuefo...: 22 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 359 KB
359 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.arte.tv/_next/static/chunks/003e35da60l_c.js0 KB85 KB (47%)✓3rd
https://www.arte.tv/_next/static/chunks/003e35da60l_c.js181 KB85 KB (47%)✓3rd
https://www.arte.tv/_next/static/chunks/04hwo-0y3l~yb.js153 KB52 KB (34%)✓3rd
https://www.arte.tv/_next/static/chunks/04hwo-0y3l~yb.js0 KB52 KB (34%)✓3rd
https://www.arte.tv/_next/static/chunks/04s5omuefokmf.js0 KB22 KB (56%)✓3rd
https://www.arte.tv/_next/static/chunks/04s5omuefokmf.js39 KB22 KB (56%)✓3rd
https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.js71 KB21 KB (30%)✓3rd
https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.js0 KB21 KB (30%)✓3rd
https://www.arte.tv/_next/static/chunks/0s2zz~x8y9154.js3 KB—✓3rd
https://www.arte.tv/_next/static/chunks/0rn04f0508uz3.js9 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

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
1.3 MB transferred, 78 requests
REVIEW
1.3 MB transferred, 78 requests
Info::
Page weighs 6.3 MB (1.3 MB transferred)
Warning::
JavaScript is 669 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 669 KB
Info::
78 HTTP requests
Info::
Estimated 0.27 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
78 requests
0.27 g CO2 per page load
JavaScript 669.1 KiB 51%
Images 307.6 KiB 23%
HTML 177.9 KiB 14%
Fonts 153.6 KiB 12%
Other 4.1 KiB 0%
Other 2.0 KiB 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

C
Page Weight Inventory
Action
78 resources · 1.3 MB · 359 KB savings available
REVIEW
78 resources · 1.3 MB · 359 KB savings available
Warning::
Page weight 290 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~359 KB of savings available
Warning::
77 third-party resources (100% of weight)
Info::
1 resources over 200KB
78 resources · 1.3 MiB · 77 third-party 290.3 KiB over 1MB target
JavaScript 51% · 669.1 KiB
Image 23% · 307.6 KiB
Document 14% · 177.9 KiB
Font 12% · 153.6 KiB
Other 0% · 6.1 KiB

~359.1 KiB of savings available

Remove unused JavaScript: 359.1 KiB
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
6 images, 0 KB saveable
PASS
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 308 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
8 fonts (154 KB)
PASS
8 fonts (154 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

154 KB total

Render-blocking

0

of 8

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 3.5 s LCP 6.5 shttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Regular.woff2Barna-Regular.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Regular.woff2 — 38.2 KiB — 771 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-SemiBold.woff2Barna-SemiBold.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-SemiBold.woff2 — 38.6 KiB — 654 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Bold.woff2Barna-Bold.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Bold.woff2 — 38.7 KiB — 908 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Light.woff2Barna-Light.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Light.woff2 — 38.0 KiB — 853 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Light.woff2Barna-Light.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Light.woff2 — 0 B — 0 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Regular.woff2Barna-Regular.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Regular.woff2 — 0 B — 0 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-SemiBold.woff2Barna-SemiBold.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-SemiBold.woff2 — 0 B — 0 ms — font-display: swaphttps://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Bold.woff2Barna-Bold.woff2 https://static-cdn.arte.tv/static/fonts/barna-web/woff2/Barna-Bold.woff2 — 0 B — 0 ms — font-display: swap
Barna-Regular.woff2 woff2 swap
Size 38 KB
Load time 771 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
Barna-SemiBold.woff2 woff2 swap
Size 39 KB
Load time 654 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
Barna-Bold.woff2 woff2 swap
Size 39 KB
Load time 908 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
Barna-Light.woff2 woff2 swap
Size 38 KB
Load time 853 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
Barna-Light.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Barna-Regular.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Barna-SemiBold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 4.3 s
Risk FOUT — text flashes from fallback to web font
Barna-Bold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 4.3 s
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
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: Google Cloud

Network Waterfall
78 requests over 5787ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.5 s LCP 6.5 shttps://arte.tv// https://arte.tv/ — 301 — 83 B — 460 ms — h2https://www.arte.tv/www.arte.tv/ https://www.arte.tv/ — 301 — 176 B — 468 ms — h2https://www.arte.tv/en/www.arte.tv/en/ https://www.arte.tv/en/ — 200 — 112.7 KiB — 511 ms — h2https://api-cdn.arte.tv/img/v2/image/N7JfEqXBuFTZxQ2CJektKo/3840x2160api-cdn.arte.tv/img/v2/image/N7JfEq... https://api-cdn.arte.tv/img/v2/image/N7JfEqXBuFTZxQ2CJektKo/3840x2160 — 200 — 247.8 KiB — 559 ms — h2https://www.arte.tv/_next/static/chunks/17x9nz_mfhi5o.jswww.arte.tv/_next/static/chunks/17x... https://www.arte.tv/_next/static/chunks/17x9nz_mfhi5o.js — 200 — 2.3 KiB — 321 ms — h2https://www.arte.tv/static/design-system/scripts/bowser@2.11.0.jswww.arte.tv/static/design-system/sc... https://www.arte.tv/static/design-system/scripts/bowser@2.11.0.js — 200 — 6.0 KiB — 316 ms — h2https://polyfill.arte.tv/polyfill/v3/polyfill.min.js?features=Element.prototype.scrollBy&version=4.8.0polyfill.arte.tv/polyfill/v3/polyfi... https://polyfill.arte.tv/polyfill/v3/polyfill.min.js?features=Element.prototype.scrollBy&version=4.8.0 — 200 — 390 B — 453 ms — h2https://www.arte.tv/_next/static/chunks/0rn04f0508uz3.jswww.arte.tv/_next/static/chunks/0rn... https://www.arte.tv/_next/static/chunks/0rn04f0508uz3.js — 200 — 8.8 KiB — 313 ms — h2https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.jswww.arte.tv/_next/static/chunks/0v0... https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.js — 200 — 71.1 KiB — 349 ms — h2https://www.arte.tv/_next/static/chunks/04s5omuefokmf.jswww.arte.tv/_next/static/chunks/04s... https://www.arte.tv/_next/static/chunks/04s5omuefokmf.js — 200 — 38.7 KiB — 365 ms — h2https://www.arte.tv/_next/static/chunks/0-l6-j0ljgdvc.jswww.arte.tv/_next/static/chunks/0-l... https://www.arte.tv/_next/static/chunks/0-l6-j0ljgdvc.js — 200 — 8.4 KiB — 370 ms — h2https://www.arte.tv/_next/static/chunks/turbopack-15j9fwpu75oc0.jswww.arte.tv/_next/static/chunks/tur... https://www.arte.tv/_next/static/chunks/turbopack-15j9fwpu75oc0.js — 200 — 4.8 KiB — 374 ms — h2https://www.arte.tv/_next/static/chunks/0f8uvcgqjxunf.jswww.arte.tv/_next/static/chunks/0f8... https://www.arte.tv/_next/static/chunks/0f8uvcgqjxunf.js — 200 — 457 B — 379 ms — h2https://www.arte.tv/_next/static/chunks/0x~h6266evwgt.jswww.arte.tv/_next/static/chunks/0x~... https://www.arte.tv/_next/static/chunks/0x~h6266evwgt.js — 200 — 14.4 KiB — 383 ms — h2https://www.arte.tv/_next/static/chunks/0644z.~o3nce6.jswww.arte.tv/_next/static/chunks/064... https://www.arte.tv/_next/static/chunks/0644z.~o3nce6.js — 200 — 3.4 KiB — 387 ms — h2https://www.arte.tv/_next/static/chunks/0jpcb2.b_3oy6.jswww.arte.tv/_next/static/chunks/0jp... https://www.arte.tv/_next/static/chunks/0jpcb2.b_3oy6.js — 200 — 9.2 KiB — 389 ms — h2https://www.arte.tv/_next/static/chunks/0exp4-lrw11aj.jswww.arte.tv/_next/static/chunks/0ex... https://www.arte.tv/_next/static/chunks/0exp4-lrw11aj.js — 200 — 12.3 KiB — 390 ms — h2https://www.arte.tv/_next/static/chunks/0_0pjip_e.e-5.jswww.arte.tv/_next/static/chunks/0_0... https://www.arte.tv/_next/static/chunks/0_0pjip_e.e-5.js — 200 — 38.9 KiB — 400 ms — h2https://www.arte.tv/_next/static/chunks/0_sb3.xm1d2tt.jswww.arte.tv/_next/static/chunks/0_s... https://www.arte.tv/_next/static/chunks/0_sb3.xm1d2tt.js — 200 — 11.0 KiB — 405 ms — h2https://www.arte.tv/_next/static/chunks/04ntwx1v_gxdx.jswww.arte.tv/_next/static/chunks/04n... https://www.arte.tv/_next/static/chunks/04ntwx1v_gxdx.js — 200 — 9.7 KiB — 412 ms — h2https://www.arte.tv/_next/static/chunks/04hwo-0y3l~yb.jswww.arte.tv/_next/static/chunks/04h... https://www.arte.tv/_next/static/chunks/04hwo-0y3l~yb.js — 200 — 153.5 KiB — 457 ms — h2https://www.arte.tv/_next/static/chunks/003e35da60l_c.jswww.arte.tv/_next/static/chunks/003... https://www.arte.tv/_next/static/chunks/003e35da60l_c.js — 200 — 181.2 KiB — 501 ms — h2https://www.arte.tv/_next/static/chunks/05hcg9gy-4mo7.jswww.arte.tv/_next/static/chunks/05h... https://www.arte.tv/_next/static/chunks/05hcg9gy-4mo7.js — 200 — 20.8 KiB — 522 ms — h2https://www.arte.tv/_next/static/chunks/0nn.ngdv73jpx.jswww.arte.tv/_next/static/chunks/0nn... https://www.arte.tv/_next/static/chunks/0nn.ngdv73jpx.js — 200 — 15.9 KiB — 506 ms — h2https://www.arte.tv/_next/static/chunks/0tzeggt5l0yr9.jswww.arte.tv/_next/static/chunks/0tz... https://www.arte.tv/_next/static/chunks/0tzeggt5l0yr9.js — 200 — 2.4 KiB — 511 ms — h2https://www.arte.tv/_next/static/chunks/0i2ofpz6~fz4..jswww.arte.tv/_next/static/chunks/0i2... https://www.arte.tv/_next/static/chunks/0i2ofpz6~fz4..js — 200 — 576 B — 512 ms — h2https://www.arte.tv/_next/static/chunks/0s2zz~x8y9154.jswww.arte.tv/_next/static/chunks/0s2... https://www.arte.tv/_next/static/chunks/0s2zz~x8y9154.js — 200 — 3.3 KiB — 515 ms — h2https://api-cdn.arte.tv/img/v2/image/XAfCKPeHmJGBccywyKQy63/380x214?type=TEXTapi-cdn.arte.tv/img/v2/image/XAfCKP... https://api-cdn.arte.tv/img/v2/image/XAfCKPeHmJGBccywyKQy63/380x214?type=TEXT — 200 — 8.1 KiB — 393 ms — h2https://api-cdn.arte.tv/img/v2/image/hVQidojNoKdamS7EMhjJGF/380x214?type=TEXTapi-cdn.arte.tv/img/v2/image/hVQido... https://api-cdn.arte.tv/img/v2/image/hVQidojNoKdamS7EMhjJGF/380x214?type=TEXT — 200 — 17.5 KiB — 403 ms — h2https://api-cdn.arte.tv/img/v2/image/8oWeHmddXQqsoJVtRstSJL/380x214?type=TEXTapi-cdn.arte.tv/img/v2/image/8oWeHm... https://api-cdn.arte.tv/img/v2/image/8oWeHmddXQqsoJVtRstSJL/380x214?type=TEXT — 200 — 16.5 KiB — 429 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.5 s LCP 6.5 shttps://arte.tv// https://arte.tv/ — 301 — 83 B — 460 ms — h2https://www.arte.tv/www.arte.tv/ https://www.arte.tv/ — 301 — 176 B — 468 ms — h2https://www.arte.tv/en/www.arte.tv/en/ https://www.arte.tv/en/ — 200 — 112.7 KiB — 511 ms — h2https://api-cdn.arte.tv/img/v2/image/N7JfEqXBuFTZxQ2CJektKo/3840x2160api-cdn.arte.tv/img/v2/image/N7JfEq... https://api-cdn.arte.tv/img/v2/image/N7JfEqXBuFTZxQ2CJektKo/3840x2160 — 200 — 247.8 KiB — 559 ms — h2https://www.arte.tv/_next/static/chunks/17x9nz_mfhi5o.jswww.arte.tv/_next/static/chunks/17x... https://www.arte.tv/_next/static/chunks/17x9nz_mfhi5o.js — 200 — 2.3 KiB — 321 ms — h2https://www.arte.tv/static/design-system/scripts/bowser@2.11.0.jswww.arte.tv/static/design-system/sc... https://www.arte.tv/static/design-system/scripts/bowser@2.11.0.js — 200 — 6.0 KiB — 316 ms — h2https://polyfill.arte.tv/polyfill/v3/polyfill.min.js?features=Element.prototype.scrollBy&version=4.8.0polyfill.arte.tv/polyfill/v3/polyfi... https://polyfill.arte.tv/polyfill/v3/polyfill.min.js?features=Element.prototype.scrollBy&version=4.8.0 — 200 — 390 B — 453 ms — h2https://www.arte.tv/_next/static/chunks/0rn04f0508uz3.jswww.arte.tv/_next/static/chunks/0rn... https://www.arte.tv/_next/static/chunks/0rn04f0508uz3.js — 200 — 8.8 KiB — 313 ms — h2https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.jswww.arte.tv/_next/static/chunks/0v0... https://www.arte.tv/_next/static/chunks/0v0~yvem-0ho1.js — 200 — 71.1 KiB — 349 ms — h2https://www.arte.tv/_next/static/chunks/04s5omuefokmf.jswww.arte.tv/_next/static/chunks/04s... https://www.arte.tv/_next/static/chunks/04s5omuefokmf.js — 200 — 38.7 KiB — 365 ms — h2https://www.arte.tv/_next/static/chunks/0-l6-j0ljgdvc.jswww.arte.tv/_next/static/chunks/0-l... https://www.arte.tv/_next/static/chunks/0-l6-j0ljgdvc.js — 200 — 8.4 KiB — 370 ms — h2https://www.arte.tv/_next/static/chunks/turbopack-15j9fwpu75oc0.jswww.arte.tv/_next/static/chunks/tur... https://www.arte.tv/_next/static/chunks/turbopack-15j9fwpu75oc0.js — 200 — 4.8 KiB — 374 ms — h2https://www.arte.tv/_next/static/chunks/0f8uvcgqjxunf.jswww.arte.tv/_next/static/chunks/0f8... https://www.arte.tv/_next/static/chunks/0f8uvcgqjxunf.js — 200 — 457 B — 379 ms — h2https://www.arte.tv/_next/static/chunks/0x~h6266evwgt.jswww.arte.tv/_next/static/chunks/0x~... https://www.arte.tv/_next/static/chunks/0x~h6266evwgt.js — 200 — 14.4 KiB — 383 ms — h2https://www.arte.tv/_next/static/chunks/0644z.~o3nce6.jswww.arte.tv/_next/static/chunks/064... https://www.arte.tv/_next/static/chunks/0644z.~o3nce6.js — 200 — 3.4 KiB — 387 ms — h2https://www.arte.tv/_next/static/chunks/0jpcb2.b_3oy6.jswww.arte.tv/_next/static/chunks/0jp... https://www.arte.tv/_next/static/chunks/0jpcb2.b_3oy6.js — 200 — 9.2 KiB — 389 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 8166ms · 113KB · €101/mo
www.arte.tv
Other
Costly
Execution 4548ms
Transfer 0 KB
Unused 30%
Monthly Cost €56/mo
www.arte.tv
Other
Costly
Execution 1348ms
Transfer 113 KB
Monthly Cost €17/mo
Unattributable
Other
Costly
Execution 785ms
Transfer 0 KB
Monthly Cost €10/mo
www.arte.tv
Other
Costly
Execution 348ms
Transfer 0 KB
Unused 47%
Monthly Cost €4/mo
www.arte.tv
Other
Costly
Execution 311ms
Transfer 0 KB
Unused 34%
Monthly Cost €4/mo
www.arte.tv
Other
Costly
Execution 308ms
Transfer 0 KB
Monthly Cost €4/mo
polyfill.arte.tv
Other
Costly
Execution 252ms
Transfer 0 KB
Monthly Cost €3/mo
www.arte.tv
Other
Optional
Execution 139ms
Transfer 0 KB
Unused 56%
Monthly Cost €2/mo
www.arte.tv
Other
Optional
Execution 75ms
Transfer 0 KB
Monthly Cost €1/mo
www.arte.tv
Other
Optional
Execution 52ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.arte.tv adds 4548ms and costs ~€56/month
  • www.arte.tv adds 1348ms and costs ~€17/month
  • Unattributable adds 785ms and costs ~€10/month
  • www.arte.tv adds 348ms and costs ~€4/month
  • www.arte.tv adds 311ms and costs ~€4/month
  • www.arte.tv adds 308ms and costs ~€4/month
  • polyfill.arte.tv adds 252ms 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.arte.tv takes 4548ms 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.arte.tv takes 1348ms 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 785ms 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.arte.tv takes 348ms 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.arte.tv takes 311ms 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.arte.tv takes 308ms 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

polyfill.arte.tv takes 252ms 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

56% of www.arte.tv'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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