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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
57
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

2.62 s

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

5.55 s

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

624 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.

4.74 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.

14.06 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 3 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 (1.9 MiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5155ms total JS execution
FIX
5155ms total JS execution
Warning::
https://www.tagesschau.de/resources/assets/modern-...: 1988ms CPU time
Warning::
https://www.tagesschau.de/: 1024ms CPU time
Warning::
https://player.h-cdn.com/loader.js?customer=ard_de...: 802ms CPU time
Warning::
Unattributable: 779ms CPU time
Warning::
https://www.tagesschau.de/resources/assets/9860-04...: 363ms CPU time
Warning::
Third-party scripts: 5155ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 22% Style & Layout 15% Script Parsing & Compilation 5% Rendering 5% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.js1988ms1387ms41ms3rd
https://www.tagesschau.de/1024ms9ms0ms3rd
https://player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1802ms651ms68ms3rd
Unattributable779ms14ms0ms3rd
https://www.tagesschau.de/resources/assets/9860-04797034dec49ec10d84.chunk.bundle.js363ms235ms98ms3rd
https://www.tagesschau.de/resources/assets/5654-d9be88ee12ff202be756.chunk.bundle.js77ms10ms9ms3rd
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.PJsh2cctCQI.O/m=gapi_iframes/rt=j/sv=1/d=1/ed=1/rs=AHpOoo_QlMhY2cycn60Rs8eI1WInRwuahw/cb=gapi.loaded_0?le=scs71ms61ms8ms3rd
https://www.tagesschau.de/resources/assets/8354-f0ee7055d7d9e2ac857f.chunk.bundle.js52ms43ms8ms3rd
D
JS Bundles
Action
32 scripts, 434 KB unused
FIX
32 scripts, 434 KB unused
Warning::
https://player.h-cdn.com/loader.js?customer=ard_de...: 169 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.tagesschau.de/resources/assets/9860-04...: 156 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.tagesschau.de/resources/assets/modern-...: 86 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.tagesschau.de/resources/assets/8354-f0...: 22 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 434 KB
434 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1244 KB169 KB (70%)✓3rd
https://www.tagesschau.de/resources/assets/9860-04797034dec49ec10d84.chunk.bundle.js255 KB156 KB (61%)✓3rd
https://www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.js176 KB86 KB (49%)✓3rd
https://www.tagesschau.de/resources/assets/8354-f0ee7055d7d9e2ac857f.chunk.bundle.js28 KB22 KB (80%)✓3rd
https://www.tagesschau.de/resources/assets/581-c9f63369de2a946a4e43.chunk.bundle.js5 KB—✓3rd
https://www.tagesschau.de/resources/assets/4812-0abfdc3d9a383d3baaca.chunk.bundle.js8 KB—✓3rd
https://www.tagesschau.de/resources/assets/5778-1035c48dfbff11a45f47.chunk.bundle.js2 KB—✓3rd
https://www.tagesschau.de/resources/assets/2164-8d4cece496f91f0fddc9.chunk.bundle.js2 KB—✓3rd
https://www.tagesschau.de/resources/assets/4050-7224dc61b031deda6400.chunk.bundle.js5 KB—✓3rd
https://www.tagesschau.de/resources/assets/6163-84d0ae7ea8baee3a9502.chunk.bundle.js4 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

F
Page Weight Inventory
Action
68 resources · 1.9 MB · 434 KB savings available
FIX
68 resources · 1.9 MB · 434 KB savings available
Warning::
Page weight 900 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~434 KB of savings available
Warning::
67 third-party resources (100% of weight)
Info::
2 resources over 200KB
68 resources · 1.9 MiB · 67 third-party 900.4 KiB over 1MB target
JavaScript 51% · 974.3 KiB
Font 25% · 476.9 KiB
Image 14% · 264.0 KiB
Document 7% · 129.5 KiB
CSS 4% · 75.0 KiB
Other 0% · 4.8 KiB

~434.1 KiB of savings available

Remove unused JavaScript: 434.1 KiB
C
Page Weight Budget
Action
1.9 MB transferred, 68 requests
REVIEW
1.9 MB transferred, 68 requests
Info::
Page weighs 6.7 MB (1.9 MB transferred)
Warning::
JavaScript is 974 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 974 KB
Info::
Fonts are 477 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 477 KB
Info::
68 HTTP requests
Info::
Estimated 0.39 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
68 requests
0.39 g CO2 per page load
JavaScript 974.3 KiB 51%
Fonts 476.9 KiB 25%
Images 222.1 KiB 12%
HTML 128.4 KiB 7%
CSS 75.0 KiB 4%
Other 42.0 KiB 2%
Other 4.0 KiB 0%
Other 1.5 KiB 0%
Other 330 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://images.tagesschau.de/image/9a300bab-f924-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.tagesschau.de/image/b24e1af8-b729-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.tagesschau.de/image/500bafa6-a89b-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.tagesschau.de/image/ad903341-f090-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.tagesschau.de/image/35510126-b002-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 222 KB
0 oversized -0 KB
4 legacy format
6 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

Performance issues directly impact user engagement and conversion rates.

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

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
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
6 fonts (477 KB)
PASS
6 fonts (477 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

477 KB total

Render-blocking

0

of 6

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 FCP 2.6 s LCP 5.6 shttps://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLight.woff2TheSansC5s-4_SemiLight.... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLight.woff2 — 113.2 KiB — 25 ms — font-display: swaphttps://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBold.woff2TheSansC5s-6_SemiBold.w... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBold.woff2 — 113.8 KiB — 25 ms — font-display: swaphttps://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLightItalic.woff2TheSansC5s-4_SemiLightI... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLightItalic.woff2 — 117.9 KiB — 10 ms — font-display: swaphttps://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBoldItalic.woff2TheSansC5s-6_SemiBoldIt... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBoldItalic.woff2 — 118.8 KiB — 26 ms — font-display: swapdata:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA… — 1.6 KiB — 28 ms — font-display: swaphttps://www.tagesschau.de/resources/assets/css/assets/9ae5a60f8f99358b3179-ardplayer.woff29ae5a60f8f99358b3179-ar... https://www.tagesschau.de/resources/assets/css/assets/9ae5a60f8f99358b3179-ardplayer.woff2 — 11.5 KiB — 8 ms — font-display: swap
TheSansC5s-4_SemiLight.... woff2 swap
Size 113 KB
Load time 25 ms
Start 112 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
TheSansC5s-6_SemiBold.w... woff2 swap
Size 114 KB
Load time 25 ms
Start 112 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
TheSansC5s-4_SemiLightI... woff2 swap
Size 118 KB
Load time 10 ms
Start 112 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
TheSansC5s-6_SemiBoldIt... woff2 swap
Size 119 KB
Load time 26 ms
Start 113 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
font-woff;charset=utf-8... woff swap
Size 2 KB
Load time 28 ms
Start 585 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
9ae5a60f8f99358b3179-ar... woff2 swap
Size 12 KB
Load time 8 ms
Start 792 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)

Fixing the unchecked items could save ~232 KB and ~464 ms

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
26 hints, 0 missing preconnects
PASS
26 hints, 0 missing preconnects
Info::
Page uses 26 resource hint(s)

Current Resource Hints

preconnect
+2
12
preload
8
dns-prefetch
6
prefetch
—

26 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
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
68 requests over 15671ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 2.6 s LCP 5.6 shttps://tagesschau.de// https://tagesschau.de/ — 308 — 140 B — 62 ms — h2https://www.tagesschau.de/www.tagesschau.de/ https://www.tagesschau.de/ — 200 — 127.9 KiB — 32 ms — h2https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLight.woff2www.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLight.woff2 — 200 — 113.2 KiB — 25 ms — h2https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBold.woff2www.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBold.woff2 — 200 — 113.8 KiB — 25 ms — h2https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLightItalic.woff2www.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-4_SemiLightItalic.woff2 — 200 — 117.9 KiB — 10 ms — h2https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBoldItalic.woff2www.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/fonts/TheSansC5s-6_SemiBoldItalic.woff2 — 200 — 118.8 KiB — 26 ms — h2https://www.tagesschau.de/resources/assets/css/main-3754c478184023a8a18b.csswww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/css/main-3754c478184023a8a18b.css — 200 — 73.8 KiB — 19 ms — h2https://www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.jswww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.js — 200 — 3.1 KiB — 23 ms — h2https://www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.csswww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/js/ts/smartbanner/smartbanner.min.css — 200 — 1.2 KiB — 15 ms — h2https://images.tagesschau.de/image/500bafa6-a89b-486b-8430-4483869f0d0a/AAABnZIYz50/AAABnSSvrFg/16x9-big/fico-babis-102.webp?width=640images.tagesschau.de/image/500bafa6... https://images.tagesschau.de/image/500bafa6-a89b-486b-8430-4483869f0d0a/AAABnZIYz50/AAABnSSvrFg/16x9-big/fico-babis-102.webp?width=640 — 200 — 28.9 KiB — 16 ms — h2https://www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.jswww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/modern-20c517e20810c30c1af7.bundle.js — 200 — 175.8 KiB — 14 ms — h2https://player.h-cdn.com/loader.js?customer=ard_deplayer.h-cdn.com/loader.js?customer... https://player.h-cdn.com/loader.js?customer=ard_de — 200 — 4.7 KiB — 138 ms — h2https://www.tagesschau.de/resources/assets/icon/ts_watermark_white.svgwww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/icon/ts_watermark_white.svg — 200 — 6.8 KiB — 25 ms — h2https://www.tagesschau.de/resources/assets/icon/timeline-icon--fill-black.svgwww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/icon/timeline-icon--fill-black.svg — 200 — 387 B — 23 ms — h2https://www.tagesschau.de/resources/assets/icon/icon-ard-external-link--fill-emotional-100.svgwww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/icon/icon-ard-external-link--fill-emotional-100.svg — 200 — 936 B — 9 ms — h2https://images.tagesschau.de/image/9a300bab-f924-4213-b43e-ea07aff3d0b2/AAABnZIZo1w/AAABnSSvrFg/16x9-big/klingbeil-324.webp?width=640images.tagesschau.de/image/9a300bab... https://images.tagesschau.de/image/9a300bab-f924-4213-b43e-ea07aff3d0b2/AAABnZIZo1w/AAABnSSvrFg/16x9-big/klingbeil-324.webp?width=640 — 200 — 6.6 KiB — 8 ms — h2https://images.tagesschau.de/image/ad903341-f090-404b-bc8a-178698261126/AAABnZGWLJ4/AAABnSSvrFg/16x9-big/zapfpistole-106.webp?width=640images.tagesschau.de/image/ad903341... https://images.tagesschau.de/image/ad903341-f090-404b-bc8a-178698261126/AAABnZGWLJ4/AAABnSSvrFg/16x9-big/zapfpistole-106.webp?width=640 — 200 — 22.4 KiB — 17 ms — h2https://images.tagesschau.de/image/35510126-b002-452b-a4f9-7f6b870152fc/AAABldr9Jik/AAABnSSvrFg/16x9-big/klimachronik-ts-100.webp?width=640images.tagesschau.de/image/35510126... https://images.tagesschau.de/image/35510126-b002-452b-a4f9-7f6b870152fc/AAABldr9Jik/AAABnSSvrFg/16x9-big/klimachronik-ts-100.webp?width=640 — 200 — 10.9 KiB — 20 ms — h2https://images.tagesschau.de/image/b24e1af8-b729-4a38-a0e5-b056bd14b7f9/AAABnZB1t6U/AAABnSSvrFg/16x9-big/singapur-222.webp?width=640images.tagesschau.de/image/b24e1af8... https://images.tagesschau.de/image/b24e1af8-b729-4a38-a0e5-b056bd14b7f9/AAABnZB1t6U/AAABnSSvrFg/16x9-big/singapur-222.webp?width=640 — 200 — 28.7 KiB — 15 ms — h2https://www.tagesschau.de/resources/assets/9860-04797034dec49ec10d84.chunk.bundle.jswww.tagesschau.de/resources/assets/... 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h2https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyD7GOI6-vPMIAUFrcKJkQsvnXHgWTs21N4&cb=1776294824562www.googleapis.com/identitytoolkit/... https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyD7GOI6-vPMIAUFrcKJkQsvnXHgWTs21N4&cb=1776294824562 — 200 — 0 B — 266 ms — h2https://www.tagesschau.de/resources/assets/image/appicon/ts_ikone_192x192px_rgb.pngwww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/image/appicon/ts_ikone_192x192px_rgb.png — 200 — 36.4 KiB — 20 ms — h2https://vqggwrz.pa-cd.com/event?s=595936&idclient=mo0o2ptjon9fenovvqggwrz.pa-cd.com/event?s=595936&id... https://vqggwrz.pa-cd.com/event?s=595936&idclient=mo0o2ptjon9fenov — 204 — 330 B — 103 ms — h2https://www.tagesschau.de/resources/assets/image/favicon/favicon.svgwww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/image/favicon/favicon.svg — 200 — 30.9 KiB — 17 ms — h2https://www.tagesschau.de/resources/assets/image/favicon/favicon.icowww.tagesschau.de/resources/assets/... https://www.tagesschau.de/resources/assets/image/favicon/favicon.ico — 200 — 11.0 KiB — 14 ms — h2https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyD7GOI6-vPMIAUFrcKJkQsvnXHgWTs21N4&cb=1776294824562www.googleapis.com/identitytoolkit/... https://www.googleapis.com/identitytoolkit/v3/relyingparty/getProjectConfig?key=AIzaSyD7GOI6-vPMIAUFrcKJkQsvnXHgWTs21N4&cb=1776294824562 — 200 — 441 B — 181 ms — h2https://player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1player.h-cdn.com/loader.js?customer... https://player.h-cdn.com/loader.js?customer=ard_de&no_conf=true&md5=933738-0acf1ad1 — 200 — 243.9 KiB — 189 ms — h2https://player.h-cdn.com/config.js?customer=ard_de&md5=62639-55349260player.h-cdn.com/config.js?customer... https://player.h-cdn.com/config.js?customer=ard_de&md5=62639-55349260 — 200 — 11.3 KiB — 167 ms — h2https://zagent7.h-cdn.com/cmd/get_links_info?customer=ard_de&zone=gen&ver=1.165.211&url=https%3A%2F%2Fwww.tagesschau.de%2Fzagent7.h-cdn.com/cmd/get_links_inf... https://zagent7.h-cdn.com/cmd/get_links_info?customer=ard_de&zone=gen&ver=1.165.211&url=https%3A%2F%2Fwww.tagesschau.de%2F — 200 — 1.0 KiB — 119 ms — http/1.1https://perr.h-cdn.com/be_client_cgi/perr?id=www_cdn_db_spark_stats&browser=chrome&browser_ver=147&customer=ard_de&tag_id=4035&tag_date=1775747725174perr.h-cdn.com/be_client_cgi/perr?i... https://perr.h-cdn.com/be_client_cgi/perr?id=www_cdn_db_spark_stats&browser=chrome&browser_ver=147&customer=ard_de&tag_id=4035&tag_date=1775747725174 — 200 — 0 B — 309 ms — http/1.1
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 5155ms · 892KB · €56/mo
www.tagesschau.de
Other
Costly
Execution 1988ms
Transfer 176 KB
Unused 49%
Monthly Cost €22/mo
www.tagesschau.de
Other
Costly
Execution 1024ms
Transfer 128 KB
Monthly Cost €11/mo
player.h-cdn.com
Other
Costly
Execution 802ms
Transfer 244 KB
Unused 70%
Monthly Cost €9/mo
Unattributable
Other
Costly
Execution 779ms
Transfer 0 KB
Monthly Cost €8/mo
www.tagesschau.de
Other
Costly
Execution 363ms
Transfer 255 KB
Unused 61%
Monthly Cost €4/mo
www.tagesschau.de
Other
Optional
Execution 77ms
Transfer 27 KB
Monthly Cost €1/mo
apis.google.com
Other
Optional
Execution 71ms
Transfer 34 KB
Monthly Cost €1/mo
www.tagesschau.de
Other
Optional
Execution 52ms
Transfer 28 KB
Unused 80%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.tagesschau.de adds 1988ms and costs ~€22/month
  • www.tagesschau.de adds 1024ms and costs ~€11/month
  • player.h-cdn.com adds 802ms and costs ~€9/month
  • Unattributable adds 779ms and costs ~€8/month
  • www.tagesschau.de adds 363ms and costs ~€4/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.tagesschau.de takes 1988ms 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.tagesschau.de takes 1024ms 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

player.h-cdn.com takes 802ms 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

70% of player.h-cdn.com'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

Unattributable takes 779ms 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.tagesschau.de takes 363ms 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

61% of www.tagesschau.de'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

80% of www.tagesschau.de'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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