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Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
5
PASS
13
INFO
4

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

Mobile Desktop
41
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
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.

2.39 s

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

10.95 s

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

3.92 s

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

0.048

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

3.55 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.

12.24 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
27
13 PASS 5 REVIEW 5 FIX
F
Page Weight Budget
Action
4.2 MB transferred, 63 requests
FIX
4.2 MB transferred, 63 requests
Critical::
Page weighs 6.9 MB (4.2 MB transferred)
Warning::
Images are 3.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.0 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::
63 HTTP requests
Info::
Estimated 0.89 g CO2 per page load
4.2 MB / 2.4 MB budget
4.2 MB transferred
63 requests
0.89 g CO2 per page load
Images 3.0 MiB 72%
JavaScript 1.1 MiB 26%
Other 28.5 KiB 1%
HTML 15.9 KiB 0%
Fonts 11.8 KiB 0%
CSS 9.4 KiB 0%
Other 4.4 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 Execution Cost
Action
7663ms total JS execution
FIX
7663ms total JS execution
Warning::
https://cdn.consentmanager.net/delivery/customdata...: 1751ms CPU time
Warning::
https://www.der-betze-brennt.de/: 1021ms CPU time
Warning::
Unattributable: 890ms CPU time
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 735ms CPU time
Warning::
https://cdn.vlyby.com/qad/prebid.js: 645ms CPU time
Warning::
Third-party scripts: 6111ms (80% of total)

Main Thread Breakdown

Script Evaluation 66% Other 13% Script Parsing & Compilation 12% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMjk0Nzgucl9HRFBSLmxfZW4uZF8xMzAxMC54XzEwLnYucC50XzEzMDEwLnh0XzM5.js1751ms1656ms31ms3rd
https://www.der-betze-brennt.de/1021ms412ms13ms1st
Unattributable890ms24ms0ms3rd
https://cdn.confiant-integrations.net/gptprebidnative/202604301904/wrap.js735ms633ms59ms3rd
https://cdn.vlyby.com/qad/prebid.js645ms495ms149ms3rd
https://www.googletagmanager.com/gtag/js?id=G-N8LTVQBFCX553ms454ms90ms3rd
https://www.der-betze-brennt.de/cdn-cgi/challenge-platform/scripts/jsd/main.js531ms513ms5ms1st
https://cdn.vlyby.com/qad/qad-outer2.js522ms402ms101ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KL8XG83383ms275ms83ms3rd
https://cperf.sportplatz-media.com/derbetzebrennt/Relaunch/der-betze-brennt.de_Home.js191ms23ms167ms3rd

Showing top 10 of 13 scripts

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...: 64 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 KB64 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=17784199035223 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
63 resources · 4.2 MB · 649 KB savings available
FIX
63 resources · 4.2 MB · 649 KB savings available
Warning::
Page weight 4.2 MB exceeds 1 MB target by 3.2 MB
Got: 4.2 MB Expected: ≤ 1 MB
Info::
~649 KB of savings available
Info::
21 third-party resources (26% of weight)
Info::
8 resources over 200KB
63 resources · 4.2 MiB · 21 third-party 3.2 MiB over 1MB target
Image 73% · 3.1 MiB
JavaScript 26% · 1.1 MiB
Document 0% · 15.9 KiB
Font 0% · 11.8 KiB
CSS 0% · 9.4 KiB
Other 0% · 6.6 KiB

~649.3 KiB of savings available

Remove unused JavaScript: 649.3 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/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/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/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/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://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/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/foot... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 3.0 MB
0 oversized -0 KB
32 legacy format
16 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

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

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.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 7.7 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A
Third-Party Impact
26% third-party, 0 ms blocking
PASS
26% third-party, 0 ms blocking
Info::
Third-party code accounts for 26% of page weight (1.1 MiB of 4.2 MiB)
Info::
Third-party blocking time is low (0 ms)
74%
26%
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
1 fonts (12 KB)
PASS
1 fonts (12 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

12 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.4 s LCP 10.9 shttps://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 — 11.8 KiB — 17 ms — font-display: swap
titillium-web-v18-latin... woff2 swap
Size 12 KB
Load time 17 ms
Start 337 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+
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
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
4 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
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
63 requests over 2063ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.4 s LCP 10.9 shttps://www.der-betze-brennt.de// https://www.der-betze-brennt.de/ — 200 — 14.9 KiB — 129 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 — 84 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 — 50 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 — 4.5 KiB — 22 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 — 17 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 — 33 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 — 924 B — 25 ms — h2https://www.der-betze-brennt.de/logo.png/logo.png https://www.der-betze-brennt.de/logo.png — 200 — 16.9 KiB — 29 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 — 38 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 — 12 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 — 21 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 — 11 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 — 613 B — 16 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 — 125 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 — 1.2 KiB — 37 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 — 44 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 — 1.9 KiB — 47 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 — 2.4 KiB — 54 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 — 49 ms — 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https://www.der-betze-brennt.de/images/news/2026-05-09-betze-comic-233-ehre-wem-ehre-gebuehrt.jpg — 200 — 577.8 KiB — 42 ms — h2https://www.der-betze-brennt.de/images/artikel/3961/foto.jpg/images/artikel/3961/foto.jpg https://www.der-betze-brennt.de/images/artikel/3961/foto.jpg — 200 — 246.3 KiB — 63 ms — h2https://www.der-betze-brennt.de/images/aktuell/1000-transfer-ticker-thumbnail.jpg/images/aktuell/1000-transfer-ticke... https://www.der-betze-brennt.de/images/aktuell/1000-transfer-ticker-thumbnail.jpg — 200 — 30.5 KiB — 61 ms — h2https://www.der-betze-brennt.de/images/news/2026-05-08-fck-dsc-choreo.jpg/images/news/2026-05-08-fck-dsc-cho... https://www.der-betze-brennt.de/images/news/2026-05-08-fck-dsc-choreo.jpg — 200 — 356.2 KiB — 69 ms — h2https://www.der-betze-brennt.de/images/fotogalerien/2210/fck-spieler-verabschiedung-2026-2.jpg/images/fotogalerien/2210/fck-spiel... https://www.der-betze-brennt.de/images/fotogalerien/2210/fck-spieler-verabschiedung-2026-2.jpg — 200 — 730.4 KiB — 119 ms — h2https://www.der-betze-brennt.de/images/fotogalerien/2209/fck-ehrung-dfb-pokal-sieger-1996-2.jpg/images/fotogalerien/2209/fck-ehrun... https://www.der-betze-brennt.de/images/fotogalerien/2209/fck-ehrung-dfb-pokal-sieger-1996-2.jpg — 200 — 228.7 KiB — 121 ms — h2https://www.der-betze-brennt.de/images/fotogalerien/2207/1-fc-kaiserslautern-arminia-bielefeld-2-bundesliga-2025-2026-2.jpg/images/fotogalerien/2207/1-fc-kais... https://www.der-betze-brennt.de/images/fotogalerien/2207/1-fc-kaiserslautern-arminia-bielefeld-2-bundesliga-2025-2026-2.jpg — 200 — 453.0 KiB — 130 ms — h2https://www.der-betze-brennt.de/images/news/2026-05-08-abschied-hanslik-redondo-westkurve.jpg/images/news/2026-05-08-abschied-ha... https://www.der-betze-brennt.de/images/news/2026-05-08-abschied-hanslik-redondo-westkurve.jpg — 200 — 378.0 KiB — 134 ms — h2https://cdn.consentmanager.net/delivery/flags/en.gifcdn.consentmanager.net/delivery/fla... https://cdn.consentmanager.net/delivery/flags/en.gif — 200 — 815 B — 16 ms — h2https://cdn.confiant-integrations.net/gptprebidnative/202604301904/wrap.jscdn.confiant-integrations.net/gptpr... https://cdn.confiant-integrations.net/gptprebidnative/202604301904/wrap.js — 200 — 139.9 KiB — 50 ms — h3blob:https://www.der-betze-brennt.de/5dc2cbe8-f696-47ef-aec4-fcfa2572a729www.der-betze-brennt.de/5dc2cbe8-f6... blob:https://www.der-betze-brennt.de/5dc2cbe8-f696-47ef-aec4-fcfa2572a729 — 200 — 0 B — 2 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 — 14 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 — 13 ms — h2https://www.der-betze-brennt.de/favicon.ico/favicon.ico https://www.der-betze-brennt.de/favicon.ico — 200 — 1.7 KiB — 15 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
80% of JavaScript execution is third-party
First-party Third-party 6111ms · 1127KB · €66/mo
cdn.consentmanager.net
Other
Costly
Execution 1751ms
Transfer 27 KB
Monthly Cost €19/mo
Unattributable
Other
Costly
Execution 890ms
Transfer 0 KB
Monthly Cost €10/mo
cdn.confiant-integrations.net
Other
Costly
Execution 735ms
Transfer 140 KB
Unused 62%
Monthly Cost €8/mo
cdn.vlyby.com
Other
Costly
Execution 645ms
Transfer 217 KB
Unused 79%
Monthly Cost €7/mo
Google Tag Manager
Tag Manager
Costly
Execution 553ms
Transfer 158 KB
Unused 40%
Monthly Cost €6/mo
cdn.vlyby.com
Other
Costly
Execution 522ms
Transfer 114 KB
Unused 58%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 383ms
Transfer 119 KB
Unused 52%
Monthly Cost €4/mo
cperf.sportplatz-media.com
Other
Optional
Execution 191ms
Transfer 156 KB
Unused 90%
Monthly Cost €2/mo
cdn.consentmanager.net
Other
Optional
Execution 165ms
Transfer 101 KB
Unused 36%
Monthly Cost €2/mo
cdn.confiant-integrations.net
Other
Optional
Execution 150ms
Transfer 65 KB
Monthly Cost €2/mo
code.jquery.com
Other
Optional
Execution 126ms
Transfer 30 KB
Unused 76%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • cdn.consentmanager.net adds 1751ms and costs ~€19/month
  • Unattributable adds 890ms and costs ~€10/month
  • cdn.confiant-integrations.net adds 735ms and costs ~€8/month
  • cdn.vlyby.com adds 645ms and costs ~€7/month
  • Google Tag Manager adds 553ms and costs ~€6/month
  • cdn.vlyby.com adds 522ms and costs ~€6/month
  • Google Tag Manager adds 383ms and costs ~€4/month

80% 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 1751ms 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 890ms 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 735ms 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

cdn.vlyby.com takes 645ms 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

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

Google Tag Manager takes 553ms 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.vlyby.com takes 522ms 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

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

Google Tag Manager takes 383ms 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

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

90% of cperf.sportplatz-media.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

76% of code.jquery.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

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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