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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
36
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.

5.07 s

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

6.67 s

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

1.58 s

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.

6.27 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.

11.69 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
7 PASS 4 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5488ms total JS execution
FIX
5488ms total JS execution
Warning::
https://www.mdr.de/resources/4.11.3/main.js?versio...: 3008ms CPU time
Warning::
https://www.mdr.de/resources/global/ardplayer/rele...: 959ms CPU time
Warning::
https://www.mdr.de/home/index.html: 596ms CPU time
Warning::
Unattributable: 402ms CPU time
Warning::
https://www.mdr.de/resources/global/ardplayer/rele...: 352ms CPU time
Warning::
Third-party scripts: 5488ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 20% Style & Layout 15% Script Parsing & Compilation 11% Rendering 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.mdr.de/resources/4.11.3/main.js?version=256003008ms1721ms150ms3rd
https://www.mdr.de/resources/global/ardplayer/release-7.3.0/ardplayer-mdr-7.3.0.75a272cb.js959ms541ms409ms3rd
https://www.mdr.de/home/index.html596ms5ms3ms3rd
Unattributable402ms15ms0ms3rd
https://www.mdr.de/resources/global/ardplayer/release-7.3.0/ardplayer-SANDLibrary.66dc5c23.chunk.js352ms187ms9ms3rd
https://www.mdr.de/resources/global/js/Vendor/piano/piano-analytics-6.10.0.js99ms89ms9ms3rd
https://www.mdr.de/resources/4.11.3/main.css?version=2794772ms0ms0ms3rd
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...: 187 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 KB187 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
56 resources · 1.6 MB · 464 KB savings available
FIX
56 resources · 1.6 MB · 464 KB savings available
Warning::
Page weight 585 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~464 KB of savings available
Warning::
55 third-party resources (100% of weight)
Info::
2 resources over 200KB
56 resources · 1.6 MiB · 55 third-party 585.4 KiB over 1MB target
JavaScript 53% · 848.5 KiB
Font 24% · 388.3 KiB
Image 14% · 225.2 KiB
CSS 7% · 118.3 KiB
Document 1% · 24.0 KiB
Other 0% · 5.2 KiB

~464.1 KiB of savings available

Remove unused JavaScript: 464.1 KiB
C
Page Weight Budget
Action
1.6 MB transferred, 56 requests
REVIEW
1.6 MB transferred, 56 requests
Info::
Page weighs 4.9 MB (1.6 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::
56 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
56 requests
0.33 g CO2 per page load
JavaScript 848.5 KiB 53%
Fonts 388.3 KiB 24%
Images 224.4 KiB 14%
CSS 118.3 KiB 7%
HTML 24.0 KiB 1%
Other 4.5 KiB 0%
Other 1.2 KiB 0%
Other 325 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 183 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
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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 5.1 s LCP 6.7 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 — 265 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 — 293 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 — 320 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 — 349 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 — 362 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 — 375 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 — 219 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 — 88 ms — font-display: swap
open-sans-regular.woff2 woff2 swap
Size 55 KB
Load time 265 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
open-sans-italic.woff2 woff2 swap
Size 58 KB
Load time 293 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
open-sans-600.woff2 woff2 swap
Size 55 KB
Load time 320 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
open-sans-600italic.woff2 woff2 swap
Size 58 KB
Load time 349 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
open-sans-700.woff2 woff2 swap
Size 54 KB
Load time 362 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
open-sans-700italic.woff2 woff2 swap
Size 56 KB
Load time 375 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
MDR-Icons.woff2 woff2 swap
Size 18 KB
Load time 219 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
MDR-Icons.woff woff swap
Size 21 KB
Load time 82 ms
Start 1.7 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 88 ms
Start 2.8 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
7 hints, 0 missing preconnects
PASS
7 hints, 0 missing preconnects
Info::
Page uses 7 resource hint(s)

Current Resource Hints

preconnect
—
preload
7
dns-prefetch
—
prefetch
—

7 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
Network Waterfall
56 requests over 3075ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 5.1 s LCP 6.7 shttps://mdr.de// https://mdr.de/ — 302 — 135 B — 519 ms — http/1.1https://www.mdr.de/www.mdr.de/ https://www.mdr.de/ — 302 — 254 B — 428 ms — h2https://www.mdr.de/home/index.htmlwww.mdr.de/home/index.html https://www.mdr.de/home/index.html — 200 — 24.0 KiB — 108 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 — 265 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 — 293 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 — 320 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 — 349 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 — 362 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 — 375 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 — 219 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 — 199 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 — 221 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 — 315 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 — 375 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 — 377 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 — 433 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 — 420 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 — 432 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 — 83 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 — 87 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 — 82 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 — 90 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 — 91 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 — 92 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 — 94 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 — 95 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 — 98 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 — 100 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 — 102 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 5.1 s LCP 6.7 shttps://mdr.de// https://mdr.de/ — 302 — 135 B — 519 ms — http/1.1https://www.mdr.de/www.mdr.de/ https://www.mdr.de/ — 302 — 254 B — 428 ms — h2https://www.mdr.de/home/index.htmlwww.mdr.de/home/index.html https://www.mdr.de/home/index.html — 200 — 24.0 KiB — 108 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 — 265 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 — 293 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 — 320 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 — 349 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 — 362 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 — 375 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 — 219 ms — 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https://www.mdr.de/index-transparent_h-342_w-512_zc-df4464ba.gif — 200 — 1.8 KiB — 102 ms — h2https://www.mdr.de/index-transparent_h-329_w-512_zc-e9d11ac4.gifwww.mdr.de/index-transparent_h-329_... https://www.mdr.de/index-transparent_h-329_w-512_zc-e9d11ac4.gif — 200 — 1.8 KiB — 104 ms — h2https://www.mdr.de/resources/global/img/base/mdr_logo.svgwww.mdr.de/resources/global/img/bas... https://www.mdr.de/resources/global/img/base/mdr_logo.svg — 200 — 881 B — 84 ms — h2https://www.mdr.de/resources/global/css/print.css?version=57715www.mdr.de/resources/global/css/pri... https://www.mdr.de/resources/global/css/print.css?version=57715 — 200 — 1.5 KiB — 104 ms — h2https://www.mdr.de/resources/global/img/base/background/trans.gifwww.mdr.de/resources/global/img/bas... https://www.mdr.de/resources/global/img/base/background/trans.gif — 200 — 436 B — 85 ms — h2https://www.mdr.de/resources/global/fonts/rebrush/icons/MDR-Icons.woffwww.mdr.de/resources/global/fonts/r... 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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 5488ms · 732KB · €26/mo
www.mdr.de
Other
Costly
Execution 3008ms
Transfer 335 KB
Unused 56%
Monthly Cost €14/mo
www.mdr.de
Other
Costly
Execution 959ms
Transfer 253 KB
Unused 64%
Monthly Cost €4/mo
www.mdr.de
Other
Costly
Execution 596ms
Transfer 24 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 402ms
Transfer 0 KB
Monthly Cost €2/mo
www.mdr.de
Other
Costly
Execution 352ms
Transfer 19 KB
Monthly Cost €2/mo
www.mdr.de
Other
Optional
Execution 99ms
Transfer 23 KB
Monthly Cost €0/mo
www.mdr.de
Other
Optional
Execution 72ms
Transfer 78 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.mdr.de adds 3008ms and costs ~€14/month
  • www.mdr.de adds 959ms and costs ~€4/month
  • www.mdr.de adds 596ms and costs ~€3/month
  • Unattributable adds 402ms and costs ~€2/month
  • www.mdr.de adds 352ms and costs ~€2/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 3008ms 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

www.mdr.de takes 959ms 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

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

www.mdr.de takes 596ms 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 402ms 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.mdr.de takes 352ms 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

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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