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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
5
PASS
5
INFO
2

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

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
85
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.

1.67 s

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

2.32 s

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

92 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.

2.19 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.

2.78 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
5 PASS 5 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
14 scripts, 464 KB unused
FIX
14 scripts, 464 KB unused
Warning::
https://www.mdr.de/resources/4.11.3/main.js?versio...: 188 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mdr.de/resources/global/ardplayer/rele...: 163 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mdr.de/resources/4.11.3/701.chunk.js: 113 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 464 KB
464 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.mdr.de/resources/4.11.3/main.js?version=25600335 KB188 KB (56%)✓3rd
https://www.mdr.de/resources/global/ardplayer/release-7.3.0/ardplayer-mdr-7.3.0.75a272cb.js253 KB163 KB (64%)✓3rd
https://www.mdr.de/resources/4.11.3/701.chunk.js120 KB113 KB (95%)✓3rd
https://www.mdr.de/resources/4.11.3/393.chunk.js3 KB—✓3rd
https://www.mdr.de/resources/4.11.3/156.chunk.js13 KB—✓3rd
https://www.mdr.de/resources/global/js/Vendor/piano/piano-analytics-6.10.0.js23 KB—✓3rd
https://www.mdr.de/resources/4.11.3/562.chunk.js8 KB—✓3rd
https://www.mdr.de/administratives/html/js-addon-100.js?version=179210 KB—✓3rd
https://www.mdr.de/resources/4.11.3/667.chunk.js44 KB—✓3rd
https://www.mdr.de/administratives/html/js-addon-base-100.js?version=424831 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

F
Page Weight Inventory
Action
54 resources · 1.5 MB · 464 KB savings available
FIX
54 resources · 1.5 MB · 464 KB savings available
Warning::
Page weight 537 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~464 KB of savings available
Warning::
53 third-party resources (100% of weight)
Info::
2 resources over 200KB
54 resources · 1.5 MiB · 53 third-party 537.1 KiB over 1MB target
JavaScript 54% · 848.5 KiB
Font 25% · 388.3 KiB
Image 11% · 179.1 KiB
CSS 8% · 118.3 KiB
Document 2% · 24.0 KiB
Other 0% · 2.9 KiB

~464.3 KiB of savings available

Remove unused JavaScript: 464.3 KiB
B
Page Weight Budget
1.5 MB transferred, 54 requests
REVIEW
1.5 MB transferred, 54 requests
Info::
Page weighs 4.8 MB (1.5 MB transferred)
Warning::
JavaScript is 848 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 848 KB
Info::
Fonts are 388 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 388 KB
Info::
54 HTTP requests
Info::
Estimated 0.32 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
54 requests
0.32 g CO2 per page load
JavaScript 848.5 KiB 54%
Fonts 388.3 KiB 25%
Images 178.3 KiB 11%
CSS 118.3 KiB 8%
HTML 24.0 KiB 2%
Other 2.2 KiB 0%
Other 1.2 KiB 0%
Other 326 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

B
Image Optimization
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Warning::
https://www.mdr.de/resources/global/img/base/mdr_l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
20 images 178 KB
0 oversized -0 KB
17 legacy format
1 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

C
JS Execution Cost
Action
1100ms total JS execution
REVIEW
1100ms total JS execution
Warning::
https://www.mdr.de/resources/4.11.3/main.js?versio...: 675ms CPU time
Info::
https://www.mdr.de/home/index.html: 170ms CPU time
Info::
https://www.mdr.de/resources/global/ardplayer/rele...: 99ms CPU time
Info::
Unattributable: 96ms CPU time
Info::
https://www.mdr.de/resources/global/ardplayer/rele...: 61ms CPU time
Warning::
Third-party scripts: 1100ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 21% Style & Layout 16% Script Parsing & Compilation 7% Parse HTML & CSS 4% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.mdr.de/resources/4.11.3/main.js?version=25600675ms425ms38ms3rd
https://www.mdr.de/home/index.html170ms1ms1ms3rd
https://www.mdr.de/resources/global/ardplayer/release-7.3.0/ardplayer-mdr-7.3.0.75a272cb.js99ms64ms35ms3rd
Unattributable96ms4ms0ms3rd
https://www.mdr.de/resources/global/ardplayer/release-7.3.0/ardplayer-SANDLibrary.66dc5c23.chunk.js61ms38ms2ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
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
9 fonts (388 KB)
PASS
9 fonts (388 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

388 KB total

Render-blocking

0

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.7 s LCP 2.3 shttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2open-sans-regular.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2 — 55.4 KiB — 255 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2open-sans-italic.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2 — 58.2 KiB — 283 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2open-sans-600.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2 — 55.3 KiB — 310 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2open-sans-600italic.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2 — 58.4 KiB — 342 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2open-sans-700.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2 — 53.5 KiB — 357 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2open-sans-700italic.woff2 https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2 — 55.8 KiB — 370 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2MDR-Icons.woff2 https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2 — 17.6 KiB — 374 ms — font-display: swaphttps://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woffMDR-Icons.woff https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff — 21.0 KiB — 82 ms — font-display: swaphttps://www.mdr.de/resources/global/ardplayer/release-7.3.0/assets/553e21224d0386ee58f0-ardplayer.woff553e21224d0386ee58f0-ar... https://www.mdr.de/resources/global/ardplayer/release-7.3.0/assets/553e21224d0386ee58f0-ardplayer.woff — 13.1 KiB — 82 ms — font-display: swap
open-sans-regular.woff2 woff2 swap
Size 55 KB
Load time 255 ms
Start 877 ms
Risk FOUT — text flashes from fallback to web font
open-sans-italic.woff2 woff2 swap
Size 58 KB
Load time 283 ms
Start 878 ms
Risk FOUT — text flashes from fallback to web font
open-sans-600.woff2 woff2 swap
Size 55 KB
Load time 310 ms
Start 878 ms
Risk FOUT — text flashes from fallback to web font
open-sans-600italic.woff2 woff2 swap
Size 58 KB
Load time 342 ms
Start 878 ms
Risk FOUT — text flashes from fallback to web font
open-sans-700.woff2 woff2 swap
Size 54 KB
Load time 357 ms
Start 879 ms
Risk FOUT — text flashes from fallback to web font
open-sans-700italic.woff2 woff2 swap
Size 56 KB
Load time 370 ms
Start 879 ms
Risk FOUT — text flashes from fallback to web font
MDR-Icons.woff2 woff2 swap
Size 18 KB
Load time 374 ms
Start 879 ms
Risk FOUT — text flashes from fallback to web font
MDR-Icons.woff woff swap
Size 21 KB
Load time 82 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
553e21224d0386ee58f0-ar... woff swap
Size 13 KB
Load time 82 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~10 KB and ~20 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
54 requests over 2662ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.7 s LCP 2.3 shttps://mdr.de// https://mdr.de/ — 302 — 135 B — 497 ms — http/1.1https://www.mdr.de/www.mdr.de/ https://www.mdr.de/ — 302 — 254 B — 279 ms — h2https://www.mdr.de/home/index.htmlwww.mdr.de/home/index.html https://www.mdr.de/home/index.html — 200 — 24.0 KiB — 109 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2 — 200 — 55.4 KiB — 255 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2 — 200 — 58.2 KiB — 283 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2 — 200 — 55.3 KiB — 310 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2 — 200 — 58.4 KiB — 342 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2 — 200 — 53.5 KiB — 357 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2 — 200 — 55.8 KiB — 370 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2 — 200 — 17.6 KiB — 374 ms — h2https://www.mdr.de/resources/4.11.3/main.css?version=27947www.mdr.de/resources/4.11.3/main.cs... https://www.mdr.de/resources/4.11.3/main.css?version=27947 — 200 — 78.1 KiB — 203 ms — h2https://www.mdr.de/administratives/html/temp-fix-100.css?version=15121www.mdr.de/administratives/html/tem... https://www.mdr.de/administratives/html/temp-fix-100.css?version=15121 — 200 — 2.2 KiB — 201 ms — h2https://www.mdr.de/resources/mdrde/channel/homepage/css/theme.css?version=20274www.mdr.de/resources/mdrde/channel/... https://www.mdr.de/resources/mdrde/channel/homepage/css/theme.css?version=20274 — 404 — 313 B — 318 ms — h2https://www.mdr.de/administratives/html/js-addon-100.js?version=17921www.mdr.de/administratives/html/js-... https://www.mdr.de/administratives/html/js-addon-100.js?version=17921 — 200 — 427 B — 203 ms — h2https://www.mdr.de/administratives/html/js-addon-base-100.js?version=42483www.mdr.de/administratives/html/js-... https://www.mdr.de/administratives/html/js-addon-base-100.js?version=42483 — 200 — 1.3 KiB — 373 ms — h2https://www.mdr.de/resources/4.11.3/main.js?version=25600www.mdr.de/resources/4.11.3/main.js... https://www.mdr.de/resources/4.11.3/main.js?version=25600 — 200 — 335.0 KiB — 430 ms — h2https://www.mdr.de/index-transparent_h-327_w-512_zc-b6485e82.gifwww.mdr.de/index-transparent_h-327_... https://www.mdr.de/index-transparent_h-327_w-512_zc-b6485e82.gif — 200 — 1.8 KiB — 418 ms — h2https://www.mdr.de/index-transparent_h-2_w-3_zc-8cdb29ec.gifwww.mdr.de/index-transparent_h-2_w-... https://www.mdr.de/index-transparent_h-2_w-3_zc-8cdb29ec.gif — 200 — 1.1 KiB — 419 ms — h2https://www.mdr.de/index-transparent_h-305_w-512_zc-19a8f313.gifwww.mdr.de/index-transparent_h-305_... https://www.mdr.de/index-transparent_h-305_w-512_zc-19a8f313.gif — 200 — 1.8 KiB — 82 ms — h2https://www.mdr.de/index-transparent_h-9_w-16_zc-d3fd16cb.gifwww.mdr.de/index-transparent_h-9_w-... https://www.mdr.de/index-transparent_h-9_w-16_zc-d3fd16cb.gif — 200 — 1.2 KiB — 85 ms — h2https://www.mdr.de/index-transparent_h-1_w-1_zc-97caf4f5.gifwww.mdr.de/index-transparent_h-1_w-... https://www.mdr.de/index-transparent_h-1_w-1_zc-97caf4f5.gif — 200 — 1.1 KiB — 82 ms — h2https://www.mdr.de/index-transparent_h-341_w-512_zc-d508cf0d.gifwww.mdr.de/index-transparent_h-341_... https://www.mdr.de/index-transparent_h-341_w-512_zc-d508cf0d.gif — 200 — 1.8 KiB — 92 ms — h2https://www.mdr.de/index-transparent_h-211_w-375_zc-b47326cc.gifwww.mdr.de/index-transparent_h-211_... https://www.mdr.de/index-transparent_h-211_w-375_zc-b47326cc.gif — 200 — 1.6 KiB — 93 ms — h2https://www.mdr.de/index-transparent_h-325_w-512_zc-1b9f6f36.gifwww.mdr.de/index-transparent_h-325_... https://www.mdr.de/index-transparent_h-325_w-512_zc-1b9f6f36.gif — 200 — 1.8 KiB — 96 ms — h2https://www.mdr.de/index-transparent_h-289_w-512_zc-786a6d98.gifwww.mdr.de/index-transparent_h-289_... https://www.mdr.de/index-transparent_h-289_w-512_zc-786a6d98.gif — 200 — 1.8 KiB — 97 ms — h2https://www.mdr.de/index-transparent_h-149_w-300_zc-0f6661be.gifwww.mdr.de/index-transparent_h-149_... https://www.mdr.de/index-transparent_h-149_w-300_zc-0f6661be.gif — 200 — 1.5 KiB — 100 ms — h2https://www.mdr.de/index-transparent_h-288_w-512_zc-361ada63.gifwww.mdr.de/index-transparent_h-288_... https://www.mdr.de/index-transparent_h-288_w-512_zc-361ada63.gif — 200 — 1.8 KiB — 102 ms — h2https://www.mdr.de/index-transparent_h-340_w-512_zc-8b5b6778.gifwww.mdr.de/index-transparent_h-340_... https://www.mdr.de/index-transparent_h-340_w-512_zc-8b5b6778.gif — 200 — 1.8 KiB — 103 ms — h2https://www.mdr.de/index-transparent_h-3_w-4_zc-a5bfe475.gifwww.mdr.de/index-transparent_h-3_w-... https://www.mdr.de/index-transparent_h-3_w-4_zc-a5bfe475.gif — 200 — 1.1 KiB — 108 ms — h2https://www.mdr.de/index-transparent_h-342_w-512_zc-df4464ba.gifwww.mdr.de/index-transparent_h-342_... https://www.mdr.de/index-transparent_h-342_w-512_zc-df4464ba.gif — 200 — 1.8 KiB — 114 ms — h2
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.7 s LCP 2.3 shttps://mdr.de// https://mdr.de/ — 302 — 135 B — 497 ms — http/1.1https://www.mdr.de/www.mdr.de/ https://www.mdr.de/ — 302 — 254 B — 279 ms — h2https://www.mdr.de/home/index.htmlwww.mdr.de/home/index.html https://www.mdr.de/home/index.html — 200 — 24.0 KiB — 109 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-regular.woff2 — 200 — 55.4 KiB — 255 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-italic.woff2 — 200 — 58.2 KiB — 283 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600.woff2 — 200 — 55.3 KiB — 310 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-600italic.woff2 — 200 — 58.4 KiB — 342 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700.woff2 — 200 — 53.5 KiB — 357 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/openSans/open-sans-700italic.woff2 — 200 — 55.8 KiB — 370 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2www.mdr.de/resources/global/fonts/r... https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woff2 — 200 — 17.6 KiB — 374 ms — h2https://www.mdr.de/resources/4.11.3/main.css?version=27947www.mdr.de/resources/4.11.3/main.cs... https://www.mdr.de/resources/4.11.3/main.css?version=27947 — 200 — 78.1 KiB — 203 ms — h2https://www.mdr.de/administratives/html/temp-fix-100.css?version=15121www.mdr.de/administratives/html/tem... https://www.mdr.de/administratives/html/temp-fix-100.css?version=15121 — 200 — 2.2 KiB — 201 ms — h2https://www.mdr.de/resources/mdrde/channel/homepage/css/theme.css?version=20274www.mdr.de/resources/mdrde/channel/... https://www.mdr.de/resources/mdrde/channel/homepage/css/theme.css?version=20274 — 404 — 313 B — 318 ms — h2https://www.mdr.de/administratives/html/js-addon-100.js?version=17921www.mdr.de/administratives/html/js-... https://www.mdr.de/administratives/html/js-addon-100.js?version=17921 — 200 — 427 B — 203 ms — h2https://www.mdr.de/administratives/html/js-addon-base-100.js?version=42483www.mdr.de/administratives/html/js-... 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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 1100ms · 631KB · €5/mo
www.mdr.de
Other
Costly
Execution 675ms
Transfer 335 KB
Unused 56%
Monthly Cost €3/mo
www.mdr.de
Other
Optional
Execution 170ms
Transfer 24 KB
Monthly Cost €1/mo
www.mdr.de
Other
Optional
Execution 99ms
Transfer 253 KB
Unused 64%
Monthly Cost €0/mo
Unattributable
Other
Optional
Execution 96ms
Transfer 0 KB
Monthly Cost €0/mo
www.mdr.de
Other
Optional
Execution 61ms
Transfer 19 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.mdr.de adds 675ms 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.mdr.de takes 675ms 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.mdr.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

64% of www.mdr.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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