Skip to content
https://videolan.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
80
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
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.
75
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.

2.88 s

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

4.22 s

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

131 ms

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

0.007

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

2.88 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.

5.88 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
9 PASS 4 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 (768.2 KiB of 768.3 KiB)
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.

C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://images.videolan.org/images/VLMC-IconSmall.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/DVBlast-IconSma... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/x264-IconSmall.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/cash.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/tools.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/heart.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/logoGrey.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/icons-VLC/vlc.m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.videolan.org/images/VLC-IconSmall.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 267 KB
0 oversized -0 KB
24 legacy format
9 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1877ms total JS execution
REVIEW
1877ms total JS execution
Warning::
https://www.videolan.org/: 771ms CPU time
Warning::
Unattributable: 590ms CPU time
Info::
https://images.videolan.org/js/jquery.min.js: 216ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-GZPM...: 152ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=UA-388...: 147ms CPU time
Warning::
Third-party scripts: 1877ms (100% of total)

Main Thread Breakdown

Other 29% Script Evaluation 25% Style & Layout 20% Rendering 18% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.videolan.org/771ms7ms4ms3rd
Unattributable590ms64ms0ms3rd
https://images.videolan.org/js/jquery.min.js216ms145ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-GZPMWXW7NJ&cx=c&gtm=4e64h1152ms117ms33ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-38853043-1147ms117ms29ms3rd
B
JS Bundles
7 scripts, 127 KB unused
REVIEW
7 scripts, 127 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GZPM...: 63 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-388...: 63 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 127 KB
127 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-GZPMWXW7NJ&cx=c&gtm=4e64h1146 KB63 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-38853043-1125 KB63 KB (51%)✓3rd
https://images.videolan.org/js/jquery.min.js37 KB—✓3rd
https://images.videolan.org/js/bootstrap.min.js3 KB—✓3rd
https://www.videolan.org/js/slick-init.js1 KB—✓3rd
https://www.videolan.org/js/slick.min.js12 KB—✓3rd
https://www.google-analytics.com/analytics.js21 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
768 KB transferred, 40 requests
PASS
768 KB transferred, 40 requests
Info::
Page weighs 1.6 MB (768 KB transferred)
Info::
40 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
768 KB / 2.4 MB budget
768 KB transferred
40 requests
0.16 g CO2 per page load
JavaScript 345.9 KiB 45%
Images 267.3 KiB 35%
Fonts 110.5 KiB 14%
CSS 27.5 KiB 4%
HTML 15.2 KiB 2%
Other 1.4 KiB 0%
Other 550 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
Font Loading
2 fonts (111 KB)
PASS
2 fonts (111 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

111 KB total

Render-blocking

0

of 2

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 FCP 2.9 s LCP 4.2 shttps://images.videolan.org/style/fonts/Raleway/Raleway-Thin.woff2Raleway-Thin.woff2 https://images.videolan.org/style/fonts/Raleway/Raleway-Thin.woff2 — 48.3 KiB — 92 ms — font-display: swaphttps://images.videolan.org/style/fonts/Raleway/Raleway-Regular.woff2Raleway-Regular.woff2 https://images.videolan.org/style/fonts/Raleway/Raleway-Regular.woff2 — 62.2 KiB — 109 ms — font-display: swap
Raleway-Thin.woff2 woff2 swap
Size 48 KB
Load time 92 ms
Start 284 ms
Risk FOUT — text flashes from fallback to web font
Raleway-Regular.woff2 woff2 swap
Size 62 KB
Load time 109 ms
Start 285 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
—
dns-prefetch
1
prefetch
—

1 resource hints configured

A
Page Weight Inventory
40 resources · 768 KB · 127 KB savings available
PASS
40 resources · 768 KB · 127 KB savings available
Info::
Within 1MB page-weight target
Got: 768 KB
Info::
~127 KB of savings available
Warning::
39 third-party resources (100% of weight)
40 resources · 768.3 KiB · 39 third-party Within 1MB page-weight target
JavaScript 45% · 345.9 KiB
Image 35% · 268.5 KiB
Font 14% · 110.5 KiB
CSS 4% · 27.5 KiB
Document 2% · 15.3 KiB
Other 0% · 550 B

~126.8 KiB of savings available

Remove unused JavaScript: 126.8 KiB
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
40 requests over 607ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.9 s LCP 4.2 shttps://videolan.org// https://videolan.org/ — 301 — 116 B — 60 ms — h2https://www.videolan.org/www.videolan.org/ https://www.videolan.org/ — 200 — 15.2 KiB — 44 ms — h2https://images.videolan.org/style/bootstrap.min.cssimages.videolan.org/style/bootstrap... https://images.videolan.org/style/bootstrap.min.css — 200 — 18.8 KiB — 64 ms — h2https://images.videolan.org/style/style.min.cssimages.videolan.org/style/style.min... https://images.videolan.org/style/style.min.css — 200 — 7.2 KiB — 49 ms — h2https://www.videolan.org/style/slick.min.csswww.videolan.org/style/slick.min.cs... https://www.videolan.org/style/slick.min.css — 200 — 1.5 KiB — 20 ms — h2https://images.videolan.org/js/jquery.min.jsimages.videolan.org/js/jquery.min.j... https://images.videolan.org/js/jquery.min.js — 200 — 37.4 KiB — 69 ms — h2https://images.videolan.org/images/logoBlue.pngimages.videolan.org/images/logoBlue... https://images.videolan.org/images/logoBlue.png — 200 — 2.0 KiB — 63 ms — h2https://images.videolan.org/images/partners/mux.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/mux.png — 200 — 10.6 KiB — 65 ms — h2https://images.videolan.org/images/partners/geminiso.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/geminiso.png — 200 — 20.3 KiB — 22 ms — h2https://images.videolan.org/images/partners/videolabs.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/videolabs.png — 200 — 3.1 KiB — 22 ms — h2https://images.videolan.org/images/partners/kwu.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/kwu.png — 200 — 18.5 KiB — 28 ms — h2https://images.videolan.org/js/bootstrap.min.jsimages.videolan.org/js/bootstrap.mi... https://images.videolan.org/js/bootstrap.min.js — 200 — 3.5 KiB — 31 ms — h2https://www.videolan.org/js/slick-init.jswww.videolan.org/js/slick-init.js https://www.videolan.org/js/slick-init.js — 200 — 750 B — 29 ms — h2https://www.videolan.org/js/slick.min.jswww.videolan.org/js/slick.min.js https://www.videolan.org/js/slick.min.js — 200 — 12.1 KiB — 32 ms — h2https://www.googletagmanager.com/gtag/js?id=UA-38853043-1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-38853043-1 — 200 — 125.4 KiB — 159 ms — h2https://images.videolan.org/images/partners/youtube_logo.svgimages.videolan.org/images/partners... https://images.videolan.org/images/partners/youtube_logo.svg — 200 — 1.9 KiB — 34 ms — h2https://images.videolan.org/vlc/screenshots/3.0.0/3.0.17-windows11-fitted.jpgimages.videolan.org/vlc/screenshots... https://images.videolan.org/vlc/screenshots/3.0.0/3.0.17-windows11-fitted.jpg — 200 — 69.6 KiB — 45 ms — h2https://images.videolan.org/images/icons-VLC/vlc.mini.svgimages.videolan.org/images/icons-VL... https://images.videolan.org/images/icons-VLC/vlc.mini.svg — 200 — 55.7 KiB — 43 ms — h2https://images.videolan.org/images/VLC-IconSmall.pngimages.videolan.org/images/VLC-Icon... https://images.videolan.org/images/VLC-IconSmall.png — 200 — 8.5 KiB — 40 ms — h2https://www.videolan.org/style/images/downloadButtonGradientOrangeBright.pngwww.videolan.org/style/images/downl... https://www.videolan.org/style/images/downloadButtonGradientOrangeBright.png — 200 — 531 B — 39 ms — h2https://images.videolan.org/images/VLMC-IconSmall.pngimages.videolan.org/images/VLMC-Ico... https://images.videolan.org/images/VLMC-IconSmall.png — 200 — 14.9 KiB — 21 ms — h2https://images.videolan.org/images/DVBlast-IconSmall.pngimages.videolan.org/images/DVBlast-... https://images.videolan.org/images/DVBlast-IconSmall.png — 200 — 13.9 KiB — 22 ms — h2https://images.videolan.org/images/x264-IconSmall.pngimages.videolan.org/images/x264-Ico... https://images.videolan.org/images/x264-IconSmall.png — 200 — 14.3 KiB — 24 ms — h2https://images.videolan.org/images/cash.pngimages.videolan.org/images/cash.png https://images.videolan.org/images/cash.png — 200 — 3.8 KiB — 20 ms — h2https://images.videolan.org/images/tools.pngimages.videolan.org/images/tools.pn... https://images.videolan.org/images/tools.png — 200 — 5.6 KiB — 20 ms — h2https://images.videolan.org/images/heart.pngimages.videolan.org/images/heart.pn... https://images.videolan.org/images/heart.png — 200 — 5.8 KiB — 20 ms — h2https://images.videolan.org/images/logoGrey.pngimages.videolan.org/images/logoGrey... https://images.videolan.org/images/logoGrey.png — 200 — 2.0 KiB — 20 ms — h2https://images.videolan.org/images/icons/platform-sprite.pngimages.videolan.org/images/icons/pl... https://images.videolan.org/images/icons/platform-sprite.png — 200 — 11.6 KiB — 21 ms — h2https://images.videolan.org/images/icons/social/twitter.svgimages.videolan.org/images/icons/so... https://images.videolan.org/images/icons/social/twitter.svg — 200 — 502 B — 22 ms — h2https://images.videolan.org/images/icons/social/facebook.svgimages.videolan.org/images/icons/so... https://images.videolan.org/images/icons/social/facebook.svg — 200 — 655 B — 20 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.9 s LCP 4.2 shttps://videolan.org// https://videolan.org/ — 301 — 116 B — 60 ms — h2https://www.videolan.org/www.videolan.org/ https://www.videolan.org/ — 200 — 15.2 KiB — 44 ms — h2https://images.videolan.org/style/bootstrap.min.cssimages.videolan.org/style/bootstrap... https://images.videolan.org/style/bootstrap.min.css — 200 — 18.8 KiB — 64 ms — h2https://images.videolan.org/style/style.min.cssimages.videolan.org/style/style.min... https://images.videolan.org/style/style.min.css — 200 — 7.2 KiB — 49 ms — h2https://www.videolan.org/style/slick.min.csswww.videolan.org/style/slick.min.cs... https://www.videolan.org/style/slick.min.css — 200 — 1.5 KiB — 20 ms — h2https://images.videolan.org/js/jquery.min.jsimages.videolan.org/js/jquery.min.j... https://images.videolan.org/js/jquery.min.js — 200 — 37.4 KiB — 69 ms — h2https://images.videolan.org/images/logoBlue.pngimages.videolan.org/images/logoBlue... https://images.videolan.org/images/logoBlue.png — 200 — 2.0 KiB — 63 ms — h2https://images.videolan.org/images/partners/mux.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/mux.png — 200 — 10.6 KiB — 65 ms — h2https://images.videolan.org/images/partners/geminiso.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/geminiso.png — 200 — 20.3 KiB — 22 ms — h2https://images.videolan.org/images/partners/videolabs.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/videolabs.png — 200 — 3.1 KiB — 22 ms — h2https://images.videolan.org/images/partners/kwu.pngimages.videolan.org/images/partners... https://images.videolan.org/images/partners/kwu.png — 200 — 18.5 KiB — 28 ms — h2https://images.videolan.org/js/bootstrap.min.jsimages.videolan.org/js/bootstrap.mi... https://images.videolan.org/js/bootstrap.min.js — 200 — 3.5 KiB — 31 ms — h2https://www.videolan.org/js/slick-init.jswww.videolan.org/js/slick-init.js https://www.videolan.org/js/slick-init.js — 200 — 750 B — 29 ms — h2https://www.videolan.org/js/slick.min.jswww.videolan.org/js/slick.min.js https://www.videolan.org/js/slick.min.js — 200 — 12.1 KiB — 32 ms — h2https://www.googletagmanager.com/gtag/js?id=UA-38853043-1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-38853043-1 — 200 — 125.4 KiB — 159 ms — h2https://images.videolan.org/images/partners/youtube_logo.svgimages.videolan.org/images/partners... https://images.videolan.org/images/partners/youtube_logo.svg — 200 — 1.9 KiB — 34 ms — h2https://images.videolan.org/vlc/screenshots/3.0.0/3.0.17-windows11-fitted.jpgimages.videolan.org/vlc/screenshots... https://images.videolan.org/vlc/screenshots/3.0.0/3.0.17-windows11-fitted.jpg — 200 — 69.6 KiB — 45 ms — h2https://images.videolan.org/images/icons-VLC/vlc.mini.svgimages.videolan.org/images/icons-VL... https://images.videolan.org/images/icons-VLC/vlc.mini.svg — 200 — 55.7 KiB — 43 ms — h2https://images.videolan.org/images/VLC-IconSmall.pngimages.videolan.org/images/VLC-Icon... https://images.videolan.org/images/VLC-IconSmall.png — 200 — 8.5 KiB — 40 ms — h2https://www.videolan.org/style/images/downloadButtonGradientOrangeBright.pngwww.videolan.org/style/images/downl... https://www.videolan.org/style/images/downloadButtonGradientOrangeBright.png — 200 — 531 B — 39 ms — h2https://images.videolan.org/images/VLMC-IconSmall.pngimages.videolan.org/images/VLMC-Ico... https://images.videolan.org/images/VLMC-IconSmall.png — 200 — 14.9 KiB — 21 ms — h2https://images.videolan.org/images/DVBlast-IconSmall.pngimages.videolan.org/images/DVBlast-... https://images.videolan.org/images/DVBlast-IconSmall.png — 200 — 13.9 KiB — 22 ms — h2https://images.videolan.org/images/x264-IconSmall.pngimages.videolan.org/images/x264-Ico... https://images.videolan.org/images/x264-IconSmall.png — 200 — 14.3 KiB — 24 ms — h2https://images.videolan.org/images/cash.pngimages.videolan.org/images/cash.png https://images.videolan.org/images/cash.png — 200 — 3.8 KiB — 20 ms — h2https://images.videolan.org/images/tools.pngimages.videolan.org/images/tools.pn... https://images.videolan.org/images/tools.png — 200 — 5.6 KiB — 20 ms — h2https://images.videolan.org/images/heart.pngimages.videolan.org/images/heart.pn... https://images.videolan.org/images/heart.png — 200 — 5.8 KiB — 20 ms — h2https://images.videolan.org/images/logoGrey.pngimages.videolan.org/images/logoGrey... https://images.videolan.org/images/logoGrey.png — 200 — 2.0 KiB — 20 ms — h2https://images.videolan.org/images/icons/platform-sprite.pngimages.videolan.org/images/icons/pl... https://images.videolan.org/images/icons/platform-sprite.png — 200 — 11.6 KiB — 21 ms — h2https://images.videolan.org/images/icons/social/twitter.svgimages.videolan.org/images/icons/so... https://images.videolan.org/images/icons/social/twitter.svg — 200 — 502 B — 22 ms — h2https://images.videolan.org/images/icons/social/facebook.svgimages.videolan.org/images/icons/so... https://images.videolan.org/images/icons/social/facebook.svg — 200 — 655 B — 20 ms — h2https://images.videolan.org/images/icons/social/mastodon.svgimages.videolan.org/images/icons/so... https://images.videolan.org/images/icons/social/mastodon.svg — 200 — 2.0 KiB — 22 ms — h2https://images.videolan.org/style/fonts/Raleway/Raleway-Thin.woff2images.videolan.org/style/fonts/Ral... https://images.videolan.org/style/fonts/Raleway/Raleway-Thin.woff2 — 200 — 48.3 KiB — 92 ms — h2https://images.videolan.org/style/fonts/Raleway/Raleway-Regular.woff2images.videolan.org/style/fonts/Ral... https://images.videolan.org/style/fonts/Raleway/Raleway-Regular.woff2 — 200 — 62.2 KiB — 109 ms — h2https://www.videolan.org/images/icons/arrow-left.pngwww.videolan.org/images/icons/arrow... https://www.videolan.org/images/icons/arrow-left.png — 200 — 511 B — 21 ms — h2https://www.videolan.org/images/icons/ripple-loader.svgwww.videolan.org/images/icons/rippl... https://www.videolan.org/images/icons/ripple-loader.svg — 200 — 686 B — 22 ms — h2https://www.videolan.org/images/icons/arrow-right.pngwww.videolan.org/images/icons/arrow... https://www.videolan.org/images/icons/arrow-right.png — 200 — 512 B — 22 ms — h2https://www.googletagmanager.com/gtag/js?id=G-GZPMWXW7NJ&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-GZPMWXW7NJ&cx=c&gtm=4e64h1 — 200 — 145.9 KiB — 57 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 84 ms — h2https://images.videolan.org/images/favicon.icoimages.videolan.org/images/favicon.... https://images.videolan.org/images/favicon.ico — 200 — 1.3 KiB — 19 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-GZPMWXW7NJ&gtm=45je64h1v9116941577za20g&_p=1776801447176&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=EAAI&are=1&cid=351337804.1776801447&frm=0&ir=1&pscdl=noapi&rcb=9&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266400~117384406&sid=1776801447&sct=1&seg=0&dl=https%3A%2F%2Fwww.videolan.org%2F&dt=VLC%3A%20Official%20site%20-%20Free%20multimedia%20solutions%20for%20all%20OS!%20-%20VideoLAN&en=page_view&_fv=1&_nsi=1&_ss=1&ep.anonymize_ip=true&tfd=535region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-GZPMWXW7NJ&gtm=45je64h1v9116941577za20g&_p=1776801447176&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=EAAI&are=1&cid=351337804.1776801447&frm=0&ir=1&pscdl=noapi&rcb=9&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266400~117384406&sid=1776801447&sct=1&seg=0&dl=https%3A%2F%2Fwww.videolan.org%2F&dt=VLC%3A%20Official%20site%20-%20Free%20multimedia%20solutions%20for%20all%20OS!%20-%20VideoLAN&en=page_view&_fv=1&_nsi=1&_ss=1&ep.anonymize_ip=true&tfd=535 — 204 — 550 B — 71 ms — h2
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 1877ms · 324KB · $25/mo
www.videolan.org
Other
Costly
Execution 771ms
Transfer 15 KB
Monthly Cost $10/mo
Unattributable
Other
Costly
Execution 590ms
Transfer 0 KB
Monthly Cost $8/mo
images.videolan.org
Other
Costly
Execution 216ms
Transfer 37 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 152ms
Transfer 146 KB
Unused 44%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 147ms
Transfer 125 KB
Unused 51%
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • www.videolan.org adds 771ms and costs ~$10/month
  • Unattributable adds 590ms and costs ~$8/month
  • images.videolan.org adds 216ms 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.videolan.org takes 771ms 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 590ms 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

images.videolan.org takes 216ms 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

51% of Google Tag Manager'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.

Send Feedback