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https://heise.de

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
70
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
77
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.34 s

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

2.85 s

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

14 ms

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

0.006

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

2.61 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.

2.90 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
8 PASS 3 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 (867.3 KiB of 867.6 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.

B
Image Optimization
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Info::
All images are well-optimized
42 images 221 KB
0 oversized -0 KB
17 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1230ms total JS execution
REVIEW
1230ms total JS execution
Warning::
https://www.heise.de/: 361ms CPU time
Info::
https://cmp.heise.de/Notice.8f529.js: 226ms CPU time
Info::
Unattributable: 211ms CPU time
Info::
https://www.heise.de/assets/akwa/v24/js/akwa.js: 207ms CPU time
Info::
https://responder.wt.heise.de/resp/api/get/2886896...: 123ms CPU time
Warning::
Third-party scripts: 1230ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Style & Layout 23% Other 19% Parse HTML & CSS 6% Rendering 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.heise.de/361ms15ms1ms3rd
https://cmp.heise.de/Notice.8f529.js226ms165ms12ms3rd
Unattributable211ms12ms0ms3rd
https://www.heise.de/assets/akwa/v24/js/akwa.js207ms136ms11ms3rd
https://responder.wt.heise.de/resp/api/get/288689636920174?url=https%3A%2F%2Fwww.heise.de%2F&v=5123ms101ms7ms3rd
https://cmp.heise.de/unified/wrapperMessagingWithoutDetection.js102ms43ms5ms3rd
B
JS Bundles
10 scripts, 132 KB unused
REVIEW
10 scripts, 132 KB unused
Warning::
https://cmp.heise.de/Notice.8f529.js: 63 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.heise.de/assets/akwa/v24/js/akwa.js: 47 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://responder.wt.heise.de/resp/api/get/2886896...: 22 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 132 KB
132 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cmp.heise.de/Notice.8f529.js91 KB63 KB (69%)✓3rd
https://www.heise.de/assets/akwa/v24/js/akwa.js86 KB47 KB (55%)✓3rd
https://responder.wt.heise.de/resp/api/get/288689636920174?url=https%3A%2F%2Fwww.heise.de%2F&v=547 KB22 KB (48%)✓3rd
https://cmp.heise.de/unified/wrapperMessagingWithoutDetection.js42 KB—✓3rd
https://cmp.heise.de/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js30 KB—✓3rd
https://cmp.heise.de/polyfills.01516.js2 KB—✓3rd
https://www.heise.de/assets/akwa/v24/js/738.fa116f.ltc.js29 KB—✓3rd
https://www.heise.de/assets/akwa/v24/js/prismjs.5ce0b0.ltc.js0 KB—✓3rd
https://cdn.mateti.net/mcp/onsite.min.js35 KB—✓3rd
https://xn2wkedljxxol.heise.de/files/site_script/heise.de.js20 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

A
Page Weight Budget
868 KB transferred, 89 requests
PASS
868 KB transferred, 89 requests
Info::
Page weighs 2.9 MB (868 KB transferred)
Info::
89 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
868 KB / 2.4 MB budget
868 KB transferred
89 requests
0.18 g CO2 per page load
JavaScript 352.8 KiB 41%
Images 221.2 KiB 25%
HTML 127.2 KiB 15%
Fonts 54.1 KiB 6%
CSS 41.4 KiB 5%
Other 31.8 KiB 4%
Other 26.6 KiB 3%
Other 12.2 KiB 1%
Other 401 B 0%
Other 0 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 (54 KB)
PASS
2 fonts (54 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

54 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 FCP 2.3 s LCP 2.9 shttps://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2ss3vf.woff2 https://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2 — 53.8 KiB — 278 ms — font-display: swaphttps://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2ss3vf.woff2 https://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2 — 274 B — 614 ms — font-display: swap
ss3vf.woff2 woff2 swap
Size 54 KB
Load time 278 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
ss3vf.woff2 woff2 swap
Size 0 KB
Load time 614 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
89 resources · 868 KB · 132 KB savings available
PASS
89 resources · 868 KB · 132 KB savings available
Info::
Within 1MB page-weight target
Got: 868 KB
Info::
~132 KB of savings available
Warning::
88 third-party resources (100% of weight)
89 resources · 867.6 KiB · 88 third-party Within 1MB page-weight target
JavaScript 44% · 382.3 KiB
Image 26% · 222.4 KiB
Document 15% · 127.5 KiB
Font 6% · 54.1 KiB
CSS 5% · 42.1 KiB
Other 5% · 39.2 KiB

~132.3 KiB of savings available

Remove unused JavaScript: 132.3 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Plus.line AG

Network Waterfall
89 requests over 6781ms
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 2.3 s LCP 2.9 shttps://heise.de// https://heise.de/ — 301 — 373 B — 637 ms — http/1.1https://www.heise.de/www.heise.de/ https://www.heise.de/ — 200 — 123.8 KiB — 654 ms — h2https://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2www.heise.de/assets/fonts/v1/source... https://www.heise.de/assets/fonts/v1/source-sans-variable/ss3vf.woff2 — 200 — 53.8 KiB — 278 ms — h2https://www.heise.de/assets/styles/index.csswww.heise.de/assets/styles/index.cs... https://www.heise.de/assets/styles/index.css — 200 — 23.5 KiB — 270 ms — h2https://www.heise.de/assets/akwa/v24/css/akwa.csswww.heise.de/assets/akwa/v24/css/ak... https://www.heise.de/assets/akwa/v24/css/akwa.css — 200 — 11.1 KiB — 279 ms — h2https://www.heise.de/icons/svg/logos/svg/heise_plus_blue.svgwww.heise.de/icons/svg/logos/svg/he... https://www.heise.de/icons/svg/logos/svg/heise_plus_blue.svg — 200 — 327 B — 282 ms — h2https://www.heise.de/icons/svg/logos/svg/heise_plus_blue_negativ.svgwww.heise.de/icons/svg/logos/svg/he... https://www.heise.de/icons/svg/logos/svg/heise_plus_blue_negativ.svg — 200 — 364 B — 280 ms — h2https://www.heise.de/icons/svg/icons/svg/arrow-right-grey-light.svgwww.heise.de/icons/svg/icons/svg/ar... https://www.heise.de/icons/svg/icons/svg/arrow-right-grey-light.svg — 200 — 294 B — 263 ms — h2https://www.heise.de/icons/svg/icons/svg/arrow-right-grey-dark.svgwww.heise.de/icons/svg/icons/svg/ar... https://www.heise.de/icons/svg/icons/svg/arrow-right-grey-dark.svg — 200 — 297 B — 264 ms — h2https://cmp.heise.de/unified/wrapperMessagingWithoutDetection.jscmp.heise.de/unified/wrapperMessagi... https://cmp.heise.de/unified/wrapperMessagingWithoutDetection.js — 200 — 42.0 KiB — 150 ms — h2https://www.heise.de/assets/akwa/v24/js/akwa.jswww.heise.de/assets/akwa/v24/js/akw... https://www.heise.de/assets/akwa/v24/js/akwa.js — 200 — 85.6 KiB — 407 ms — h2https://www.heise.de/icons/svg/icons/svg/comments_outline_grey_light.svgwww.heise.de/icons/svg/icons/svg/co... https://www.heise.de/icons/svg/icons/svg/comments_outline_grey_light.svg — 200 — 388 B — 395 ms — h2https://www.heise.de/icons/svg/icons/svg/comments_outline_grey_dark.svgwww.heise.de/icons/svg/icons/svg/co... https://www.heise.de/icons/svg/icons/svg/comments_outline_grey_dark.svg — 200 — 386 B — 415 ms — h2https://www.heise.de/icons/svg/icons/svg/video_outline_grey_light.svgwww.heise.de/icons/svg/icons/svg/vi... https://www.heise.de/icons/svg/icons/svg/video_outline_grey_light.svg — 200 — 376 B — 417 ms — h2https://www.heise.de/icons/svg/icons/svg/video_outline_grey_dark.svgwww.heise.de/icons/svg/icons/svg/vi... https://www.heise.de/icons/svg/icons/svg/video_outline_grey_dark.svg — 200 — 376 B — 567 ms — h2data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPHN2ZyB3aWR0aD0iNjk2c…data:image/svg+xml;base64,PD94bWwgd... data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPHN2ZyB3aWR0aD0iNjk2c… — 200 — 0 B — 0 ms — datahttps://www.heise.de/icons/ho/touch-icons/manifest.jsonwww.heise.de/icons/ho/touch-icons/m... https://www.heise.de/icons/ho/touch-icons/manifest.json — 200 — 401 B — 375 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Mobil_background_375x424_1_-12728f5363976f3a.png?org_if_sml=1&q=90&width=640heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Mobil_background_375x424_1_-12728f5363976f3a.png?org_if_sml=1&q=90&width=640 — 200 — 2.8 KiB — 10 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Mobil_background_375x424_1_-12728f5363976f3a.png?org_if_sml=1&q=90&width=1280heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Mobil_background_375x424_1_-12728f5363976f3a.png?org_if_sml=1&q=90&width=1280 — 200 — 3.2 KiB — 13 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Desktop_background_1104x252_1_-dfd7946a4bc18aef.png?org_if_sml=1&q=90&width=2048heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Desktop_background_1104x252_1_-dfd7946a4bc18aef.png?org_if_sml=1&q=90&width=2048 — 200 — 4.5 KiB — 12 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Desktop_background_1104x252_1_-dfd7946a4bc18aef.png?org_if_sml=1&q=90&width=2408heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/3/9/8/1/1/Podcast_Desktop_background_1104x252_1_-dfd7946a4bc18aef.png?org_if_sml=1&q=90&width=2408 — 200 — 5.6 KiB — 10 ms — h2https://www.heise.de/ivw-bin/ivw/CPwww.heise.de/ivw-bin/ivw/CP https://www.heise.de/ivw-bin/ivw/CP — 200 — 234 B — 431 ms — h2https://cmp.heise.de/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.jscmp.heise.de/unified/4.40.1/gdpr-tc... https://cmp.heise.de/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js — 200 — 30.0 KiB — 7 ms — h2https://cmp.heise.de/wrapper/v2/meta-data?hasCsp=true&accountId=1603&env=prod&metadata=%7B%22gdpr%22%3A%7B%7D%7D&propertyId=14602&scriptVersion=4.40.1&scriptType=unifiedcmp.heise.de/wrapper/v2/meta-data?h... https://cmp.heise.de/wrapper/v2/meta-data?hasCsp=true&accountId=1603&env=prod&metadata=%7B%22gdpr%22%3A%7B%7D%7D&propertyId=14602&scriptVersion=4.40.1&scriptType=unified — 200 — 754 B — 12 ms — h2https://cmp.heise.de/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1603%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcmp.heise.de%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Fwww.heise.de%2F%22%2C%22propertyId%22%3A14602%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%7D&nonKeyedLocalState=null&ch=51393105751393105793cf&scriptVersion=4.40.1&scriptType=unifiedcmp.heise.de/wrapper/v2/messages?ha... https://cmp.heise.de/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1603%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcmp.heise.de%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Fwww.heise.de%2F%22%2C%22propertyId%22%3A14602%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%7D&nonKeyedLocalState=null&ch=51393105751393105793cf&scriptVersion=4.40.1&scriptType=unified — 200 — 11.4 KiB — 6 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Mobil_background_375x424-e19f1f13bd2fe7fc.png?org_if_sml=1&q=90&width=640heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Mobil_background_375x424-e19f1f13bd2fe7fc.png?org_if_sml=1&q=90&width=640 — 200 — 4.6 KiB — 9 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Mobil_background_375x424-e19f1f13bd2fe7fc.png?org_if_sml=1&q=90&width=1280heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Mobil_background_375x424-e19f1f13bd2fe7fc.png?org_if_sml=1&q=90&width=1280 — 200 — 5.3 KiB — 9 ms — h2https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Desktop_background_1104x252-6917651a149a8d67.png?org_if_sml=1&q=90&width=2048heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/8/1/5/2/6/8/Podcast_Desktop_background_1104x252-6917651a149a8d67.png?org_if_sml=1&q=90&width=2048 — 200 — 8.3 KiB — 10 ms — 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https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/4/9/9/5/0/3/6/https___xp-22025e91b5f9d4c9.jpeg?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=246 — 200 — 3.0 KiB — 27 ms — h3https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/4/3/2/4/IBM_z17-ed0e484fbbdad9e1.png?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/4/3/2/4/IBM_z17-ed0e484fbbdad9e1.png?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336 — 200 — 8.9 KiB — 24 ms — h3https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/4/3/5/7/md4TsqPA-70748058c3352df0.jpeg?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/4/3/5/7/md4TsqPA-70748058c3352df0.jpeg?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336 — 200 — 3.1 KiB — 28 ms — h3https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/3/6/7/2/734b06d0a4860535.jpeg?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336heise.cloudimg.io/v7/_www-heise-de_... https://heise.cloudimg.io/v7/_www-heise-de_/imgs/18/5/0/6/3/6/7/2/734b06d0a4860535.jpeg?force_format=avif%2Cwebp%2Cjpeg&org_if_sml=1&q=50&width=336 — 200 — 6.7 KiB — 23 ms — h3https://cdn.mateti.net/mcp/onsite.min.jscdn.mateti.net/mcp/onsite.min.js https://cdn.mateti.net/mcp/onsite.min.js — 200 — 35.2 KiB — 669 ms — http/1.1https://cmp.heise.de/consent/tcfv2/vendor-list/categories?siteId=14602cmp.heise.de/consent/tcfv2/vendor-l... https://cmp.heise.de/consent/tcfv2/vendor-list/categories?siteId=14602 — 200 — 1.2 KiB — 4 ms — h2https://xn2wkedljxxol.heise.de/files/site_script/heise.de.jsxn2wkedljxxol.heise.de/files/site_s... https://xn2wkedljxxol.heise.de/files/site_script/heise.de.js — 200 — 19.9 KiB — 21 ms — 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h2https://prophet.heise.de/688012155290337/wt?p=528,www.heise.de.ho,1,800x600,24,1,1776294869548,2,800x600,0&ct=ho.consent-wall&la=en&cp17=desktop&cs1=0&ck19=open&pu=https%3A%2F%2Fwww.heise.de%2F&pf=49&cs802=4096&cs801=3e25392533prophet.heise.de/688012155290337/wt... https://prophet.heise.de/688012155290337/wt?p=528,www.heise.de.ho,1,800x600,24,1,1776294869548,2,800x600,0&ct=ho.consent-wall&la=en&cp17=desktop&cs1=0&ck19=open&pu=https%3A%2F%2Fwww.heise.de%2F&pf=49&cs802=4096&cs801=3e25392533 — 200 — 825 B — 167 ms — http/1.1https://xn2wkedljxxol.heise.de/xn2wkedljxxol.heise.de/ https://xn2wkedljxxol.heise.de/ — 200 — 355 B — 185 ms — h2https://prophet.heise.de/688012155290337/rdfs?cfg=1prophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs?cfg=1 — 200 — 0 B — 477 ms — http/1.1https://prophet.heise.de/688012155290337/rdfs?cfg=1prophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs?cfg=1 — 200 — 0 B — 477 ms — http/1.1https://prophet.heise.de/688012155290337/rdfs?cfg=1prophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs?cfg=1 — 200 — 403 B — 168 ms — http/1.1https://prophet.heise.de/688012155290337/rdfs?cfg=1prophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs?cfg=1 — 200 — 7.9 KiB — 340 ms — http/1.1https://688012155290337.mateti.net/mcp/ls.html?trackId=688012155290337688012155290337.mateti.net/mcp/ls.h... https://688012155290337.mateti.net/mcp/ls.html?trackId=688012155290337 — 200 — 1.2 KiB — 816 ms — http/1.1https://www.heise.de/icons/ho/favicon/favicon.svgwww.heise.de/icons/ho/favicon/favic... https://www.heise.de/icons/ho/favicon/favicon.svg — 200 — 522 B — 306 ms — h2https://www.heise.de/favicon.icowww.heise.de/favicon.ico https://www.heise.de/favicon.ico — 200 — 655 B — 343 ms — h2https://prophet.heise.de/688012155290337/rdfsprophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs — 200 — 0 B — 160 ms — http/1.1https://prophet.heise.de/688012155290337/rdfsprophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs — 200 — 956 B — 171 ms — http/1.1https://prophet.heise.de/688012155290337/rdfsprophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs — 200 — 955 B — 168 ms — http/1.1https://prophet.heise.de/688012155290337/rdfsprophet.heise.de/688012155290337/rd... https://prophet.heise.de/688012155290337/rdfs — 200 — 955 B — 168 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 1230ms · 389KB · €13/mo
www.heise.de
Other
Costly
Execution 361ms
Transfer 124 KB
Monthly Cost €4/mo
cmp.heise.de
Other
Costly
Execution 226ms
Transfer 91 KB
Unused 69%
Monthly Cost €2/mo
Unattributable
Other
Costly
Execution 211ms
Transfer 0 KB
Monthly Cost €2/mo
www.heise.de
Other
Costly
Execution 207ms
Transfer 86 KB
Unused 55%
Monthly Cost €2/mo
responder.wt.heise.de
Other
Optional
Execution 123ms
Transfer 47 KB
Unused 48%
Monthly Cost €1/mo
cmp.heise.de
Other
Optional
Execution 102ms
Transfer 42 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.heise.de adds 361ms and costs ~€4/month
  • cmp.heise.de adds 226ms and costs ~€2/month
  • Unattributable adds 211ms and costs ~€2/month
  • www.heise.de adds 207ms 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.heise.de takes 361ms 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

cmp.heise.de takes 226ms 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

69% of cmp.heise.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

Unattributable takes 211ms 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.heise.de takes 207ms 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

55% of www.heise.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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