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https://www.der-betze-brennt.de

Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
4
REVIEW
5
PASS
10
INFO
4

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

577 ms

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

1.63 s

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

479 ms

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

0.189

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

1.43 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.

3.15 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
23
10 PASS 5 REVIEW 4 FIX
F
Page Weight Budget
Action
3.5 MB transferred, 64 requests
FIX
3.5 MB transferred, 64 requests
Warning::
Page weighs 6.2 MB (3.5 MB transferred)
Warning::
Images are 2.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.3 MB
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
64 HTTP requests
Info::
Estimated 0.74 g CO2 per page load
3.5 MB / 2.4 MB budget
3.5 MB transferred
64 requests
0.74 g CO2 per page load
Images 2.3 MiB 66%
JavaScript 1.1 MiB 32%
Other 28.5 KiB 1%
Fonts 24.6 KiB 1%
HTML 15.9 KiB 0%
CSS 9.3 KiB 0%
Other 4.6 KiB 0%
Other 2.5 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

F
JS Bundles
Action
14 scripts, 649 KB unused
FIX
14 scripts, 649 KB unused
Warning::
https://cdn.vlyby.com/qad/prebid.js: 172 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cperf.sportplatz-media.com/derbetzebrennt/...: 140 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cperf.sportplatz-media.com/derbetzebrennt/...: unminified — 19 KB could be saved
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 87 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.vlyby.com/qad/qad-outer2.js: 66 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-N8LT...: 63 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 649 KB
649 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.vlyby.com/qad/prebid.js217 KB172 KB (79%)✓3rd
https://cperf.sportplatz-media.com/derbetzebrennt/Relaunch/der-betze-brennt.de_Home.js156 KB140 KB (90%)✗3rd
https://cdn.confiant-integrations.net/gptprebidnative/202604301904/wrap.js140 KB87 KB (62%)✓3rd
https://cdn.vlyby.com/qad/qad-outer2.js114 KB66 KB (58%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-N8LTVQBFCX158 KB63 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KL8XG83119 KB62 KB (52%)✓3rd
https://cdn.consentmanager.net/delivery/js/cmp_en.min.js101 KB36 KB (36%)✓3rd
https://code.jquery.com/jquery-3.7.1.min.js30 KB22 KB (76%)✓3rd
https://c.delivery.consentmanager.net/delivery/cmp.php?&cdid=63ce40b9334c&h=https%3A%2F%2Fwww.der-betze-brennt.de%2F&&__cmpfcc=1&l=en&o=17784199262883 KB—✓3rd
https://www.der-betze-brennt.de/cdn-cgi/challenge-platform/h/g/scripts/jsd/fe6331af5207/main.js?10 KB—✓1st

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
64 resources · 3.5 MB · 649 KB savings available
FIX
64 resources · 3.5 MB · 649 KB savings available
Warning::
Page weight 3.5 MB exceeds 1 MB target by 2.5 MB
Got: 3.5 MB Expected: ≤ 1 MB
Info::
~649 KB of savings available
Info::
22 third-party resources (33% of weight)
Info::
7 resources over 200KB
64 resources · 3.5 MiB · 22 third-party 2.5 MiB over 1MB target
Image 67% · 2.3 MiB
JavaScript 32% · 1.1 MiB
Font 1% · 24.6 KiB
Document 0% · 15.9 KiB
CSS 0% · 9.3 KiB
Other 0% · 6.8 KiB

~648.6 KiB of savings available

Remove unused JavaScript: 648.6 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
C
Image Optimization
Action
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://www.der-betze-brennt.de/images/system/head... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/head... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/head... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/news/2026-0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.consentmanager.net/delivery/img/logo16... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.der-betze-brennt.de/images/system/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 2.3 MB
0 oversized -0 KB
32 legacy format
14 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

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

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

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
1819ms total JS execution
REVIEW
1819ms total JS execution
Warning::
https://www.der-betze-brennt.de/: 406ms CPU time
Warning::
https://cdn.consentmanager.net/delivery/customdata...: 366ms CPU time
Info::
https://cdn.confiant-integrations.net/gptprebidnat...: 243ms CPU time
Info::
Unattributable: 183ms CPU time
Info::
https://www.der-betze-brennt.de/cdn-cgi/challenge-...: 139ms CPU time
Warning::
Third-party scripts: 1274ms (70% of total)

Main Thread Breakdown

Script Evaluation 63% Other 15% Script Parsing & Compilation 10% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://www.der-betze-brennt.de/406ms140ms3ms1st
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMjk0Nzgucl9HRFBSLmxfZW4uZF8xMzAxMC54XzEwLnYucC50XzEzMDEwLnh0XzM5.js366ms344ms7ms3rd
https://cdn.confiant-integrations.net/gptprebidnative/202604301904/wrap.js243ms192ms15ms3rd
Unattributable183ms5ms0ms3rd
https://www.der-betze-brennt.de/cdn-cgi/challenge-platform/scripts/jsd/main.js139ms133ms2ms1st
https://cdn.vlyby.com/qad/qad-outer2.js123ms97ms21ms3rd
https://cdn.vlyby.com/qad/prebid.js122ms87ms35ms3rd
https://www.googletagmanager.com/gtag/js?id=G-N8LTVQBFCX113ms89ms21ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KL8XG8373ms51ms17ms3rd
https://cdn.consentmanager.net/delivery/js/cmp_en.min.js50ms21ms27ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
A
Third-Party Impact
33% third-party, 0 ms blocking
PASS
33% third-party, 0 ms blocking
Info::
Third-party code accounts for 33% of page weight (1.1 MiB of 3.5 MiB)
Info::
Third-party blocking time is low (0 ms)
67%
33%
First-party Third-party
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 (25 KB)
PASS
2 fonts (25 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

25 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 500 ms 1.0 s 1.5 s FCP 577 ms LCP 1.6 shttps://www.der-betze-brennt.de/inc/fonts/oswald-v56-latin-700.woff2oswald-v56-latin-700.woff2 https://www.der-betze-brennt.de/inc/fonts/oswald-v56-latin-700.woff2 — 12.7 KiB — 54 ms — font-display: swaphttps://www.der-betze-brennt.de/inc/fonts/titillium-web-v18-latin-700.woff2titillium-web-v18-latin... https://www.der-betze-brennt.de/inc/fonts/titillium-web-v18-latin-700.woff2 — 11.9 KiB — 15 ms — font-display: swap
oswald-v56-latin-700.woff2 woff2 swap
Size 13 KB
Load time 54 ms
Start 295 ms
Risk FOUT — text flashes from fallback to web font
titillium-web-v18-latin... woff2 swap
Size 12 KB
Load time 15 ms
Start 471 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, no-cache, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
64 requests over 2049ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 577 ms LCP 1.6 shttps://www.der-betze-brennt.de// https://www.der-betze-brennt.de/ — 200 — 14.9 KiB — 139 ms — h2https://www.googletagmanager.com/gtag/js?id=G-N8LTVQBFCXwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-N8LTVQBFCX — 200 — 158.0 KiB — 78 ms — h2https://code.jquery.com/jquery-3.7.1.min.jscode.jquery.com/jquery-3.7.1.min.js https://code.jquery.com/jquery-3.7.1.min.js — 200 — 30.0 KiB — 41 ms — h2https://www.der-betze-brennt.de/css/style.css?v=20260506-2/css/style.css?v=20260506-2 https://www.der-betze-brennt.de/css/style.css?v=20260506-2 — 200 — 4.6 KiB — 20 ms — h2https://www.der-betze-brennt.de/css/tables.css?v=20260506-2/css/tables.css?v=20260506-2 https://www.der-betze-brennt.de/css/tables.css?v=20260506-2 — 200 — 2.0 KiB — 22 ms — h2https://www.der-betze-brennt.de/css/mobile.css?v=20250715/css/mobile.css?v=20250715 https://www.der-betze-brennt.de/css/mobile.css?v=20250715 — 200 — 1.2 KiB — 25 ms — h2https://www.der-betze-brennt.de/css/news-overview.css?v=11102025/css/news-overview.css?v=11102025 https://www.der-betze-brennt.de/css/news-overview.css?v=11102025 — 200 — 943 B — 27 ms — h2https://www.der-betze-brennt.de/logo.png/logo.png https://www.der-betze-brennt.de/logo.png — 200 — 16.9 KiB — 21 ms — h2https://www.der-betze-brennt.de/images/system/header/icon-search.png/images/system/header/icon-search.p... https://www.der-betze-brennt.de/images/system/header/icon-search.png — 200 — 2.9 KiB — 28 ms — h2https://www.der-betze-brennt.de/images/system/header/icon-user-logout.png/images/system/header/icon-user-log... https://www.der-betze-brennt.de/images/system/header/icon-user-logout.png — 200 — 3.0 KiB — 15 ms — h2https://www.der-betze-brennt.de/images/system/header/icon-menu.png/images/system/header/icon-menu.png https://www.der-betze-brennt.de/images/system/header/icon-menu.png — 200 — 2.9 KiB — 20 ms — h2https://www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/rot.png/images/interaktiv/stimmungsbaromet... https://www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/rot.png — 200 — 1.4 KiB — 18 ms — h2https://www.der-betze-brennt.de/inc/scripts/overlay-menu.js/inc/scripts/overlay-menu.js https://www.der-betze-brennt.de/inc/scripts/overlay-menu.js — 200 — 702 B — 53 ms — h2https://cdn.vlyby.com/qad/qad-outer2.jscdn.vlyby.com/qad/qad-outer2.js https://cdn.vlyby.com/qad/qad-outer2.js — 200 — 114.3 KiB — 163 ms — h2https://www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/gruen.png/images/interaktiv/stimmungsbaromet... https://www.der-betze-brennt.de/images/interaktiv/stimmungsbarometer/gruen.png — 200 — 1.3 KiB — 68 ms — h2https://www.der-betze-brennt.de/images/system/footer/bester-fussball-blog-2021-png24.png/images/system/footer/bester-fussba... https://www.der-betze-brennt.de/images/system/footer/bester-fussball-blog-2021-png24.png — 200 — 23.9 KiB — 40 ms — h2https://www.der-betze-brennt.de/images/system/footer/fritz-walter.png/images/system/footer/fritz-walter.... https://www.der-betze-brennt.de/images/system/footer/fritz-walter.png — 200 — 9.9 KiB — 32 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-facebook.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-facebook.png — 200 — 1.8 KiB — 44 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-instagram.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-instagram.png — 200 — 2.5 KiB — 60 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-bluesky.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-bluesky.png — 200 — 2.1 KiB — 66 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-x.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-x.png — 200 — 2.3 KiB — 68 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-threads.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-threads.png — 200 — 2.3 KiB — 72 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-social-media-youtube.png/images/system/footer/icon-social-m... https://www.der-betze-brennt.de/images/system/footer/icon-social-media-youtube.png — 200 — 2.0 KiB — 64 ms — h2https://www.der-betze-brennt.de/images/system/footer/icon-news-small.png/images/system/footer/icon-news-sma... https://www.der-betze-brennt.de/images/system/footer/icon-news-small.png — 200 — 1.4 KiB — 82 ms — 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h2https://cdn.consentmanager.net/delivery/flags/en.gifcdn.consentmanager.net/delivery/fla... https://cdn.consentmanager.net/delivery/flags/en.gif — 200 — 816 B — 18 ms — h2https://currency.prebid.org/latest.jsoncurrency.prebid.org/latest.json https://currency.prebid.org/latest.json — 200 — 2.0 KiB — 34 ms — h2https://v2track.vlyby.com/?vid=QAD&et=17&uid=7.1.38&pid=tl7g7HSI3o9KLVjPaZmTw5&pl=default&dp=&c=&mdp=&mdt=&host=der-betze-brennt.de&ref=https%3A%2F%2Fwww.der-betze-brennt.de%2F&country=NL&ua=chrome&bil=0&ai=true&tstamp=1778419927766&dds=&rid=15261c86-ba4e-422b-8db9-79b21ffd77dd&ctx=&r=65742v2track.vlyby.com/?vid=QAD&et=17&ui... https://v2track.vlyby.com/?vid=QAD&et=17&uid=7.1.38&pid=tl7g7HSI3o9KLVjPaZmTw5&pl=default&dp=&c=&mdp=&mdt=&host=der-betze-brennt.de&ref=https%3A%2F%2Fwww.der-betze-brennt.de%2F&country=NL&ua=chrome&bil=0&ai=true&tstamp=1778419927766&dds=&rid=15261c86-ba4e-422b-8db9-79b21ffd77dd&ctx=&r=65742 — 200 — 177 B — 11 ms — h2blob:https://www.der-betze-brennt.de/ac60db1f-b9f6-4100-8a9a-5818204d7a6awww.der-betze-brennt.de/ac60db1f-b9... blob:https://www.der-betze-brennt.de/ac60db1f-b9f6-4100-8a9a-5818204d7a6a — 200 — 0 B — 3 ms — blobhttps://www.der-betze-brennt.de/images/system/favicons/favicon.png/images/system/favicons/favicon.png https://www.der-betze-brennt.de/images/system/favicons/favicon.png — 200 — 20.8 KiB — 16 ms — h2https://www.der-betze-brennt.de/images/system/favicons/favicon.gif/images/system/favicons/favicon.gif https://www.der-betze-brennt.de/images/system/favicons/favicon.gif — 200 — 5.9 KiB — 12 ms — h2https://www.der-betze-brennt.de/favicon.ico/favicon.ico https://www.der-betze-brennt.de/favicon.ico — 200 — 1.7 KiB — 14 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
70% of JavaScript execution is third-party
First-party Third-party 1274ms · 876KB · €14/mo
cdn.consentmanager.net
Other
Costly
Execution 366ms
Transfer 27 KB
Monthly Cost €4/mo
cdn.confiant-integrations.net
Other
Costly
Execution 243ms
Transfer 140 KB
Unused 62%
Monthly Cost €3/mo
Unattributable
Other
Optional
Execution 183ms
Transfer 0 KB
Monthly Cost €2/mo
cdn.vlyby.com
Other
Optional
Execution 123ms
Transfer 114 KB
Unused 58%
Monthly Cost €1/mo
cdn.vlyby.com
Other
Optional
Execution 122ms
Transfer 217 KB
Unused 79%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 113ms
Transfer 158 KB
Unused 40%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 73ms
Transfer 119 KB
Unused 52%
Monthly Cost €1/mo
cdn.consentmanager.net
Other
Optional
Execution 50ms
Transfer 101 KB
Unused 36%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • cdn.consentmanager.net adds 366ms and costs ~€4/month
  • cdn.confiant-integrations.net adds 243ms and costs ~€3/month

70% 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

cdn.consentmanager.net takes 366ms 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

cdn.confiant-integrations.net takes 243ms 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

62% of cdn.confiant-integrations.net'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

58% of cdn.vlyby.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

79% of cdn.vlyby.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

52% of Google Tag Manager'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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-04-11 — 2026-05-08)

LCP (p75)

1153 ms

94% good

INP (p75)

105 ms

90% good

CLS (p75)

0.030

87% good

FCP (p75)

804 ms

TTFB (p75)

391 ms

This origin passes Core Web Vitals assessment
Image Optimization
74 images, 1366 KB total, 750 KB wasted
INFO

Image Optimization Audit

Total Images

74

Total Size

1366 KB

Oversized

17

Wasted

750 KB

29 missing alt text 22 missing dimensions 39 missing lazy loading
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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