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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

83
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.
100
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.

1.53 s

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

1.93 s

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

36 ms

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

0.012

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

2.02 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.

3.04 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
6 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
D
JS Bundles
Action
67 scripts, 333 KB unused
FIX
67 scripts, 333 KB unused
Warning::
https://code.piano.io/api/tinypass.min.js: 82 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent-cdn.zeit.de/Notice.8f529.js: 63 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MH9...: 62 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://sp.zon.zeit.de/4.6.6/rl9os54c.js: 39 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://interactive.zeit.de/g/wiegehtesihnen/app.5...: 22 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 333 KB
333 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://code.piano.io/api/tinypass.min.js132 KB82 KB (63%)3rd
https://consent-cdn.zeit.de/Notice.8f529.js91 KB63 KB (69%)3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MH96D5180 KB62 KB (40%)3rd
https://sp.zon.zeit.de/4.6.6/rl9os54c.js80 KB39 KB (49%)3rd
https://interactive.zeit.de/g/wiegehtesihnen/app.5b89d5abbb910dab2c6e.cached.js45 KB22 KB (49%)3rd
https://consent-cdn.zeit.de/wrapperMessagingWithoutDetection.js51 KB22 KB (43%)3rd
https://cdn.cxense.com/cx.js38 KB21 KB (57%)3rd
https://cdn.cxense.com/cx.js38 KB21 KB (57%)3rd
https://static.zeit.de/p/zeit.web/js/2638.54757e17384f0478.js1 KB3rd
https://static.zeit.de/p/zeit.web/js/9398.7e9a0cc8a9f889a7.js3 KB3rd

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

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

D
Page Weight Inventory
Action
130 resources · 1.9 MB · 333 KB savings available
FIX
130 resources · 1.9 MB · 333 KB savings available
Warning::
Page weight 918 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~333 KB of savings available
Warning::
129 third-party resources (100% of weight)
Info::
1 resources over 200KB
130 resources · 1.9 MiB · 129 third-party 918.0 KiB over 1MB target
JavaScript 55% · 1.0 MiB
Document 17% · 329.2 KiB
Image 13% · 249.2 KiB
Font 10% · 191.3 KiB
CSS 4% · 77.4 KiB
Other 1% · 25.1 KiB

~332.8 KiB of savings available

Remove unused JavaScript: 332.8 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.9 MB transferred, 130 requests
REVIEW
1.9 MB transferred, 130 requests
Info::
Page weighs 5.4 MB (1.9 MB transferred)
Warning::
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Warning::
130 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.40 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
130 requests
0.40 g CO2 per page load
JavaScript 1.0 MiB 55%
HTML 329.1 KiB 17%
Images 247.3 KiB 13%
Fonts 191.3 KiB 10%
CSS 77.4 KiB 4%
Other 16.0 KiB 1%
Other 8.7 KiB 0%
Other 2.1 KiB 0%
Other 496 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://img.zeit.de/wissen/2026-03/sexualisierte-g... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://img.zeit.de/sport/2026-04/champions-league... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://img.zeit.de/politik/2026-04/usa-iran-blog-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://interactive.zeit.de/g/2026/nsdap-mitglieds... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 247 KB
0 oversized -0 KB
1 legacy format
5 missing dimensions CLS risk

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

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
1717ms total JS execution
REVIEW
1717ms total JS execution
Warning::
https://www.zeit.de/index: 730ms CPU time
Info::
Unattributable: 238ms CPU time
Info::
https://consent-cdn.zeit.de/Notice.8f529.js: 184ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-MH9...: 130ms CPU time
Info::
https://code.piano.io/api/tinypass.min.js: 114ms CPU time
Warning::
Third-party scripts: 1717ms (100% of total)

Main Thread Breakdown

Script Evaluation 37% Style & Layout 26% Other 18% Parse HTML & CSS 7% Script Parsing & Compilation 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.zeit.de/index730ms48ms6ms3rd
Unattributable238ms25ms0ms3rd
https://consent-cdn.zeit.de/Notice.8f529.js184ms137ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MH96D5130ms108ms20ms3rd
https://code.piano.io/api/tinypass.min.js114ms87ms15ms3rd
https://consent-cdn.zeit.de/wrapperMessagingWithoutDetection.js99ms56ms8ms3rd
https://static.zeit.de/iqd/cdn_iqdzeit/live/iqadcontroller.js88ms35ms27ms3rd
https://cdn.storifyme.xyz/static/web-components/storifyme-elements-v2.min.js70ms38ms5ms3rd
https://interactive.zeit.de/g/wiegehtesihnen/app.5b89d5abbb910dab2c6e.cached.js65ms46ms5ms3rd
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
7 fonts (191 KB)
PASS
7 fonts (191 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

191 KB total

Render-blocking

0

of 7

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 1.5 s LCP 1.9 shttps://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular-2024.woff2TabletGothic-Regular-20... https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular-2024.woff2 — 26.2 KiB — 124 ms — font-display: swaphttps://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold-2024.woff2TabletGothic-Bold-2024.... https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold-2024.woff2 — 26.0 KiB — 95 ms — font-display: swaphttps://static.zeit.de/p/zeit.web/fonts/zeit-tiemann_schmal/ZeitTiemann-Schmal.woff2ZeitTiemann-Schmal.woff2 https://static.zeit.de/p/zeit.web/fonts/zeit-tiemann_schmal/ZeitTiemann-Schmal.woff2 — 18.6 KiB — 4 ms — font-display: swaphttps://static.zeit.de/p/zeit.web/fonts/ginto_nord/ABCGintoNord-Bold.woff2ABCGintoNord-Bold.woff2 https://static.zeit.de/p/zeit.web/fonts/ginto_nord/ABCGintoNord-Bold.woff2 — 34.0 KiB — 6 ms — font-display: swaphttps://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold.woff2TabletGothic-Bold.woff2 https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold.woff2 — 26.8 KiB — 5 ms — font-display: swaphttps://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular.woff2TabletGothic-Regular.woff2 https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular.woff2 — 26.7 KiB — 6 ms — font-display: swaphttps://cdn.storifyme.xyz/accounts/zeit-online-0568113/assets/f-font_843071621695641001583_TabletGothic-Bold.wofff-font_8430716216956410... https://cdn.storifyme.xyz/accounts/zeit-online-0568113/assets/f-font_843071621695641001583_TabletGothic-Bold.woff — 33.0 KiB — 28 ms — font-display: swap
TabletGothic-Regular-20... woff2 swap
Size 26 KB
Load time 124 ms
Start 842 ms
Risk FOUT — text flashes from fallback to web font
TabletGothic-Bold-2024.... woff2 swap
Size 26 KB
Load time 95 ms
Start 842 ms
Risk FOUT — text flashes from fallback to web font
ZeitTiemann-Schmal.woff2 woff2 swap
Size 19 KB
Load time 4 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
ABCGintoNord-Bold.woff2 woff2 swap
Size 34 KB
Load time 6 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
TabletGothic-Bold.woff2 woff2 swap
Size 27 KB
Load time 5 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
TabletGothic-Regular.woff2 woff2 swap
Size 27 KB
Load time 6 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
f-font_8430716216956410... woff swap
Size 33 KB
Load time 28 ms
Start 3.0 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
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
130 requests over 5910ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.5 s LCP 1.9 shttps://zeit.de// https://zeit.de/ — 301 — 106 B — 467 ms — h2https://www.zeit.de/indexwww.zeit.de/index https://www.zeit.de/index — 200 — 326.0 KiB — 400 ms — h2https://img.zeit.de/wissen/2026-03/sexualisierte-gewalt-schutz-strafrecht-justiz-tobias-singelnstein-bild/wide__1000x562__desktopimg.zeit.de/wissen/2026-03/sexualis... https://img.zeit.de/wissen/2026-03/sexualisierte-gewalt-schutz-strafrecht-justiz-tobias-singelnstein-bild/wide__1000x562__desktop — 200 — 194.9 KiB — 165 ms — h2https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular-2024.woff2static.zeit.de/p/zeit.web/fonts/tab... https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Regular-2024.woff2 — 200 — 26.2 KiB — 124 ms — h2https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold-2024.woff2static.zeit.de/p/zeit.web/fonts/tab... https://static.zeit.de/p/zeit.web/fonts/tabletgothic/TabletGothic-Bold-2024.woff2 — 200 — 26.0 KiB — 95 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/normalize.783dc32c4a720f551e408c6df364d56a.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/normalize.783dc32c4a720f551e408c6df364d56a.css — 200 — 686 B — 26 ms — h2https://static.zeit.de/p/zeit.web/css/web.site/base/custom-properties.00139ce3a4ce10ffa3d1a67f2d12854e.cssstatic.zeit.de/p/zeit.web/css/web.s... https://static.zeit.de/p/zeit.web/css/web.site/base/custom-properties.00139ce3a4ce10ffa3d1a67f2d12854e.css — 200 — 1.7 KiB — 26 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/base/base.1c062aba666659f4c9d47e5c0bc1069d.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/base/base.1c062aba666659f4c9d47e5c0bc1069d.css — 200 — 7.3 KiB — 27 ms — h2https://static.zeit.de/p/zeit.web/css/web.site/base/base.cce7811dfb2ef38ba6cf74e69fe2b5ae.cssstatic.zeit.de/p/zeit.web/css/web.s... https://static.zeit.de/p/zeit.web/css/web.site/base/base.cce7811dfb2ef38ba6cf74e69fe2b5ae.css — 200 — 1021 B — 32 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/centerpage/centerpage.55da6fcf8ca723692ee337923ee40fb6.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/centerpage/centerpage.55da6fcf8ca723692ee337923ee40fb6.css — 200 — 7.7 KiB — 40 ms — h2https://static.zeit.de/p/zeit.web/css/web.site/centerpage/centerpage.e79d89fadd4c1d6764c50b0f9f6e1c84.cssstatic.zeit.de/p/zeit.web/css/web.s... https://static.zeit.de/p/zeit.web/css/web.site/centerpage/centerpage.e79d89fadd4c1d6764c50b0f9f6e1c84.css — 200 — 3.3 KiB — 37 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/standalone/navigation/navigation.7fa64dbee67d09d203d4378ee5328919.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/standalone/navigation/navigation.7fa64dbee67d09d203d4378ee5328919.css — 200 — 3.1 KiB — 32 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/standalone/components/audioplayer.52df52e600459a125215245da90f504e.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/standalone/components/audioplayer.52df52e600459a125215245da90f504e.css — 200 — 1.6 KiB — 43 ms — h2https://static.zeit.de/p/zeit.web/js/zustimmungsverwaltung.8dbf75252219ee60.jsstatic.zeit.de/p/zeit.web/js/zustim... https://static.zeit.de/p/zeit.web/js/zustimmungsverwaltung.8dbf75252219ee60.js — 200 — 4.6 KiB — 74 ms — h2https://static.zeit.de/p/zeit.web/js/colorscheme.192ba57a20e4e444.jsstatic.zeit.de/p/zeit.web/js/colors... https://static.zeit.de/p/zeit.web/js/colorscheme.192ba57a20e4e444.js — 200 — 1.2 KiB — 73 ms — h2https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/hp-teaser-DAEpF2a1.09969214.cssinteractive.zeit.de/g/2026/nsdap-mi... https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/hp-teaser-DAEpF2a1.09969214.css — 200 — 775 B — 60 ms — h2https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/legacy-DB0Dg92s.2fc058f2.cssinteractive.zeit.de/g/2026/nsdap-mi... https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/legacy-DB0Dg92s.2fc058f2.css — 200 — 5.5 KiB — 55 ms — h2https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/Input-CNcXQnfe.ef6ee2d9.cssinteractive.zeit.de/g/2026/nsdap-mi... https://interactive.zeit.de/g/2026/nsdap-mitgliedskartei-2026/static/assets/Input-CNcXQnfe.ef6ee2d9.css — 200 — 1.2 KiB — 32 ms — h2https://static.zeit.de/p/zeit.web/css/web.site/standalone/teaser/zon-teaser-printbox.c3100c18168b5c4f0913aaee7b3f1ac1.cssstatic.zeit.de/p/zeit.web/css/web.s... https://static.zeit.de/p/zeit.web/css/web.site/standalone/teaser/zon-teaser-printbox.c3100c18168b5c4f0913aaee7b3f1ac1.css — 200 — 359 B — 31 ms — h2https://static.zeit.de/p/zeit.web/css/web.site/standalone/newslettersignup.158fe1ebfa993bc90f66a78529bbcc31.cssstatic.zeit.de/p/zeit.web/css/web.s... https://static.zeit.de/p/zeit.web/css/web.site/standalone/newslettersignup.158fe1ebfa993bc90f66a78529bbcc31.css — 200 — 1010 B — 18 ms — h2https://static.zeit.de/p/zeit.web/css/web.core/standalone/zon-carousel.f1c9953cd173298a729acc08fe7c4c59.cssstatic.zeit.de/p/zeit.web/css/web.c... https://static.zeit.de/p/zeit.web/css/web.core/standalone/zon-carousel.f1c9953cd173298a729acc08fe7c4c59.css — 200 — 2.0 KiB — 19 ms — h2https://interactive.zeit.de/g/2024/energiekostenmonitor/static/assets/index.afb438dd.cssinteractive.zeit.de/g/2024/energiek... https://interactive.zeit.de/g/2024/energiekostenmonitor/static/assets/index.afb438dd.css — 200 — 1.0 KiB — 28 ms — h2https://interactive.zeit.de/g/2024/energiekostenmonitor/static/assets/index.02d12cd5.cssinteractive.zeit.de/g/2024/energiek... 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h2https://c.zeit.de/com.snowplowanalytics.snowplow/tp2c.zeit.de/com.snowplowanalytics.sno... https://c.zeit.de/com.snowplowanalytics.snowplow/tp2 — 200 — 18 B — 303 ms — h3https://static.zeit.de/p/zeit.web/icons/favicon.icostatic.zeit.de/p/zeit.web/icons/fav... https://static.zeit.de/p/zeit.web/icons/favicon.ico — 200 — 2.0 KiB — 4 ms — h2https://buy-eu.piano.io/api/v3/anon/assets/sdk-runtime-config.js?aid=u6vAlvTEpebuy-eu.piano.io/api/v3/anon/assets/... https://buy-eu.piano.io/api/v3/anon/assets/sdk-runtime-config.js?aid=u6vAlvTEpe — 200 — 780 B — 23 ms — h3https://c.zeit.de/com.snowplowanalytics.snowplow/tp2c.zeit.de/com.snowplowanalytics.sno... https://c.zeit.de/com.snowplowanalytics.snowplow/tp2 — 200 — 18 B — 305 ms — h3
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 1717ms · 928KB · €19/mo
www.zeit.de
Other
Costly
Execution 730ms
Transfer 326 KB
Monthly Cost €8/mo
Unattributable
Other
Costly
Execution 238ms
Transfer 0 KB
Monthly Cost €3/mo
consent-cdn.zeit.de
Other
Optional
Execution 184ms
Transfer 91 KB
Unused 69%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 130ms
Transfer 180 KB
Unused 40%
Monthly Cost €1/mo
code.piano.io
Other
Optional
Execution 114ms
Transfer 132 KB
Unused 63%
Monthly Cost €1/mo
consent-cdn.zeit.de
Other
Optional
Execution 99ms
Transfer 51 KB
Unused 43%
Monthly Cost €1/mo
static.zeit.de
Other
Optional
Execution 88ms
Transfer 70 KB
Monthly Cost €1/mo
cdn.storifyme.xyz
Other
Optional
Execution 70ms
Transfer 32 KB
Monthly Cost €1/mo
interactive.zeit.de
Other
Optional
Execution 65ms
Transfer 45 KB
Unused 49%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.zeit.de adds 730ms and costs ~€8/month
  • Unattributable adds 238ms 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.zeit.de takes 730ms 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 238ms 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 consent-cdn.zeit.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

63% of code.piano.io'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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