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https://Webnetz.de

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
8
PASS
11
INFO
3

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

69
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.
100
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.

3.94 s

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

4.24 s

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

249 ms

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

0.005

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

5.13 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.

6.48 s

Page Load Progression

609 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.7 s
4.3 s
4.9 s
Checks
26
11 PASS 8 REVIEW 4 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 108 requests
FIX
2.2 MB transferred, 108 requests
Info::
Page weighs 4.4 MB (2.2 MB transferred)
Warning::
108 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.47 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
108 requests
0.47 g CO2 per page load
Other 1.5 MiB 66%
JavaScript 321.2 KiB 14%
Images 203.9 KiB 9%
Fonts 132.7 KiB 6%
HTML 55.0 KiB 2%
CSS 45.2 KiB 2%
Other 16.9 KiB 1%
Other 11.2 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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 (2.2 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3905ms total JS execution
FIX
3905ms total JS execution
Warning::
https://www.webnetz.de/build/assets/site-128f0841....: 1614ms CPU time
Warning::
https://privacy-proxy.usercentrics.eu/latest/uc-bl...: 744ms CPU time
Warning::
Unattributable: 686ms CPU time
Warning::
https://www.webnetz.de/: 675ms CPU time
Info::
https://web.cmp.usercentrics.eu/ui/v/3.119.0/WebSd...: 121ms CPU time
Warning::
Third-party scripts: 3905ms (100% of total)

Main Thread Breakdown

Script Evaluation 38% Other 29% Style & Layout 18% Rendering 9%
ScriptTotalScriptingParse/CompileParty
https://www.webnetz.de/build/assets/site-128f0841.js1614ms653ms0ms3rd
https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js744ms632ms11ms3rd
Unattributable686ms14ms0ms3rd
https://www.webnetz.de/675ms7ms4ms3rd
https://web.cmp.usercentrics.eu/ui/v/3.119.0/WebSdk.lib.5ddd9ff8.js121ms96ms21ms3rd
https://web.cmp.usercentrics.eu/ui/v/3.119.0/UcGdprCmpView.b05dbc41.js66ms2ms7ms3rd
D
Page Weight Inventory
Action
108 resources · 2.2 MB · 131 KB savings available
FIX
108 resources · 2.2 MB · 131 KB savings available
Warning::
Page weight 2.2 MB exceeds 1 MB target by 1.2 MB
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~131 KB of savings available
Warning::
107 third-party resources (100% of weight)
Info::
2 resources over 200KB
108 resources · 2.2 MiB · 107 third-party 1.2 MiB over 1MB target
Media 66% · 1.5 MiB
JavaScript 14% · 321.2 KiB
Image 9% · 215.0 KiB
Font 6% · 132.7 KiB
Document 2% · 55.2 KiB
CSS 2% · 45.2 KiB
Other 1% · 16.8 KiB

~131.2 KiB of savings available

Remove unused JavaScript: 131.2 KiB
B
Image Optimization
72 images, 0 KB saveable
REVIEW
72 images, 0 KB saveable
Info::
All images are well-optimized
72 images 204 KB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
B
JS Bundles
15 scripts, 131 KB unused
REVIEW
15 scripts, 131 KB unused
Warning::
https://www.webnetz.de/build/assets/site-128f0841....: 96 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web.cmp.usercentrics.eu/ui/v/3.119.0/WebSd...: 35 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 131 KB
131 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.webnetz.de/build/assets/site-128f0841.js152 KB96 KB (63%)3rd
https://web.cmp.usercentrics.eu/ui/v/3.119.0/WebSdk.lib.5ddd9ff8.js56 KB35 KB (63%)3rd
https://web.cmp.usercentrics.eu/ui/loader.js16 KB3rd
https://www.webnetz.de/build/assets/barlow-v12-latin-600-4ed993c7.js0 KB3rd
https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.js0 KB3rd
https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js30 KB3rd
https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.js0 KB3rd
https://crm.zoho.eu/crm/javascript/zcga.js3 KB3rd
https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.js0 KB3rd
https://web.cmp.usercentrics.eu/ui/v/3.119.0/GdprCmpController.597ef4e9.js9 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

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 3.9 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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
9 fonts (133 KB)
PASS
9 fonts (133 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

133 KB total

Render-blocking

0

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.9 s LCP 4.2 shttps://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.jsbarlow-v12-latin-300-4e... https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.js — 151 B — 42 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.jsbarlow-v12-latin-regula... https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.js — 37 B — 42 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.jsbarlow-v12-latin-500-4e... https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.js — 37 B — 41 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-600-4ed993c7.jsbarlow-v12-latin-600-4e... https://www.webnetz.de/build/assets/barlow-v12-latin-600-4ed993c7.js — 37 B — 43 ms — font-display: swaphttps://www.webnetz.de/build/assets/Barlow-Bold-984a0f81.ttfBarlow-Bold-984a0f81.ttf https://www.webnetz.de/build/assets/Barlow-Bold-984a0f81.ttf — 49.3 KiB — 40 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-500-7c0597b1.woff2barlow-v12-latin-500-7c... https://www.webnetz.de/build/assets/barlow-v12-latin-500-7c0597b1.woff2 — 20.5 KiB — 41 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-regular-7c9c80a6.woff2barlow-v12-latin-regula... https://www.webnetz.de/build/assets/barlow-v12-latin-regular-7c9c80a6.woff2 — 20.7 KiB — 45 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-300-6563f086.woff2barlow-v12-latin-300-65... https://www.webnetz.de/build/assets/barlow-v12-latin-300-6563f086.woff2 — 20.6 KiB — 36 ms — font-display: swaphttps://www.webnetz.de/build/assets/barlow-v12-latin-600-2b14e839.woff2barlow-v12-latin-600-2b... https://www.webnetz.de/build/assets/barlow-v12-latin-600-2b14e839.woff2 — 21.3 KiB — 42 ms — font-display: swap
barlow-v12-latin-300-4e... unknown swap
Size 0 KB
Load time 42 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-regula... unknown swap
Size 0 KB
Load time 42 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-500-4e... unknown swap
Size 0 KB
Load time 41 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-600-4e... unknown swap
Size 0 KB
Load time 43 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
Barlow-Bold-984a0f81.ttf ttf swap
Size 49 KB
Load time 40 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
barlow-v12-latin-500-7c... woff2 swap
Size 21 KB
Load time 41 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-regula... woff2 swap
Size 21 KB
Load time 45 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-300-65... woff2 swap
Size 21 KB
Load time 36 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
barlow-v12-latin-600-2b... woff2 swap
Size 21 KB
Load time 42 ms
Start 1.5 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)

Fixing the unchecked items could save ~15 KB and ~30 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
15 hints, 0 missing preconnects
PASS
15 hints, 0 missing preconnects
Warning::
4 font preload(s) missing `crossorigin` -- font will be downloaded twice
Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.js, https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.js, https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.js (+1 more). Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Info::
Page uses 15 resource hint(s)

Current Resource Hints

preconnect
3
preload
10
dns-prefetch
2
prefetch

15 resource hints configured

Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.js, https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.js, https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.js (+1 more). Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: max-age=0
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
108 requests over 2590ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.9 s LCP 4.2 shttps://webnetz.de// https://webnetz.de/ — 301 — 130 B — 97 ms — h2https://www.webnetz.de/www.webnetz.de/ https://www.webnetz.de/ — 200 — 53.9 KiB — 1.1 s — h2https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.jswww.webnetz.de/build/assets/barlow-... https://www.webnetz.de/build/assets/barlow-v12-latin-300-4ed993c7.js — 200 — 151 B — 42 ms — h2https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.jswww.webnetz.de/build/assets/barlow-... https://www.webnetz.de/build/assets/barlow-v12-latin-regular-4ed993c7.js — 200 — 37 B — 42 ms — h2https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.jswww.webnetz.de/build/assets/barlow-... https://www.webnetz.de/build/assets/barlow-v12-latin-500-4ed993c7.js — 200 — 37 B — 41 ms — h2https://www.webnetz.de/build/assets/barlow-v12-latin-600-4ed993c7.jswww.webnetz.de/build/assets/barlow-... https://www.webnetz.de/build/assets/barlow-v12-latin-600-4ed993c7.js — 200 — 37 B — 43 ms — h2https://www.webnetz.de/build/assets/site-f6261c38.csswww.webnetz.de/build/assets/site-f6... https://www.webnetz.de/build/assets/site-f6261c38.css — 200 — 39.4 KiB — 68 ms — h2https://www.webnetz.de/build/assets/site-7055e83c.csswww.webnetz.de/build/assets/site-70... https://www.webnetz.de/build/assets/site-7055e83c.css — 200 — 5.8 KiB — 47 ms — h2https://www.webnetz.de/build/assets/site-128f0841.jswww.webnetz.de/build/assets/site-12... https://www.webnetz.de/build/assets/site-128f0841.js — 200 — 152.0 KiB — 101 ms — h2https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.jsprivacy-proxy.usercentrics.eu/lates... https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js — 200 — 30.5 KiB — 105 ms — h2https://www.webnetz.de/images/poster-hero.webpwww.webnetz.de/images/poster-hero.w... https://www.webnetz.de/images/poster-hero.webp — 200 — 34.5 KiB — 56 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL2xlaXN0dW5nc3NlaXRlbi9jb250ZW50LWthbXBhZ25lbi93ZWJuZXR6LXNob290aW5nLmpwZw/webnetz-shooting.jpg?p=placeholder&s=ea80829eada375be305cd045018b7b66www.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2xlaXN0dW5nc3NlaXRlbi9jb250ZW50LWthbXBhZ25lbi93ZWJuZXR6LXNob290aW5nLmpwZw/webnetz-shooting.jpg?p=placeholder&s=ea80829eada375be305cd045018b7b66 — 200 — 202 B — 115 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL2FnZW50dXJmb3Rvcy9taXRhcmJlaXRlci1hdXN0YXVzY2gta29tbXVuaWthdGlvbi5wbmc/mitarbeiter-austausch-kommunikation.png?p=placeholder&s=6e662b794abd3866782e7dfa0e61e15awww.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2FnZW50dXJmb3Rvcy9taXRhcmJlaXRlci1hdXN0YXVzY2gta29tbXVuaWthdGlvbi5wbmc/mitarbeiter-austausch-kommunikation.png?p=placeholder&s=6e662b794abd3866782e7dfa0e61e15a — 200 — 351 B — 100 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL25hdmlnYXRpb24vaW5nYS1uaWNvLXBvZGNhc3QtbmF2aS5qcGc/inga-nico-podcast-navi.jpg?p=placeholder&s=5a6db25b29cef9917d9867b2ee1e2764www.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL25hdmlnYXRpb24vaW5nYS1uaWNvLXBvZGNhc3QtbmF2aS5qcGc/inga-nico-podcast-navi.jpg?p=placeholder&s=5a6db25b29cef9917d9867b2ee1e2764 — 200 — 237 B — 133 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL2FnZW50dXJmb3Rvcy93ZWJuZXR6LWNhbXB1cy1iaWxsYXJkdGlzY2gtbWl0YXJiZWl0ZXJpbi0xLTE3MTU4NTUxNjUuanBn/webnetz-campus-billardtisch-mitarbeiterin-1-1715855165.jpg?p=placeholder&s=671633c166b27ad550b1734365e620b7www.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2FnZW50dXJmb3Rvcy93ZWJuZXR6LWNhbXB1cy1iaWxsYXJkdGlzY2gtbWl0YXJiZWl0ZXJpbi0xLTE3MTU4NTUxNjUuanBn/webnetz-campus-billardtisch-mitarbeiterin-1-1715855165.jpg?p=placeholder&s=671633c166b27ad550b1734365e620b7 — 200 — 252 B — 123 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL2J2ZHctYWZmLTIwMjUtMjYucG5n/bvdw-aff-2025-26.png?p=placeholder&s=3ea3fede0f242d2c438926a1dbecb84ewww.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2J2ZHctYWZmLTIwMjUtMjYucG5n/bvdw-aff-2025-26.png?p=placeholder&s=3ea3fede0f242d2c438926a1dbecb84e — 200 — 433 B — 121 ms — h2https://web.cmp.usercentrics.eu/ui/loader.jsweb.cmp.usercentrics.eu/ui/loader.j... https://web.cmp.usercentrics.eu/ui/loader.js — 200 — 15.7 KiB — 78 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL2J2ZHctc2VhLTIwMjUtMjYucG5n/bvdw-sea-2025-26.png?p=placeholder&s=261ec9f0505f3a6a54dbafbfaf7c846dwww.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2J2ZHctc2VhLTIwMjUtMjYucG5n/bvdw-sea-2025-26.png?p=placeholder&s=261ec9f0505f3a6a54dbafbfaf7c846d — 200 — 452 B — 124 ms — h2https://crm.zoho.eu/crm/javascript/zcga.jscrm.zoho.eu/crm/javascript/zcga.js https://crm.zoho.eu/crm/javascript/zcga.js — 200 — 3.3 KiB — 82 ms — 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https://web.cmp.usercentrics.eu/ui/v/3.119.0/UcGdprCmpView.b05dbc41.js — 200 — 18.4 KiB — 34 ms — h3https://www.webnetz.de/img/asset/aW1hZ2VzL2Jsb2dncmFmaWtlbi9oZWFkZXItYmllci5qcGc/header-bier.jpg?p=placeholder&s=abf041f4c1442b222d57fcc3b34e2517www.webnetz.de/img/asset/aW1hZ2VzL2... https://www.webnetz.de/img/asset/aW1hZ2VzL2Jsb2dncmFmaWtlbi9oZWFkZXItYmllci5qcGc/header-bier.jpg?p=placeholder&s=abf041f4c1442b222d57fcc3b34e2517 — 200 — 268 B — 101 ms — h2https://www.webnetz.de/img/asset/aW1hZ2VzL3ByZXNzZXZlcm9lZmZlbnRsaWNodW5nZW4vaXN0b2NrLTIyNjEyMjkzNjIuanBn/istock-2261229362.jpg?p=placeholder&s=9d9ac889c4853f7f13ac5f7956b7da7awww.webnetz.de/img/asset/aW1hZ2VzL3... https://www.webnetz.de/img/asset/aW1hZ2VzL3ByZXNzZXZlcm9lZmZlbnRsaWNodW5nZW4vaXN0b2NrLTIyNjEyMjkzNjIuanBn/istock-2261229362.jpg?p=placeholder&s=9d9ac889c4853f7f13ac5f7956b7da7a — 200 — 156 B — 110 ms — 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https://www.webnetz.de/videos/webnetz/wn_mobile.mp4 — 206 — 304.1 KiB — 53 ms — h2data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%2…data:image/svg+xml,%3Csvg%20xmlns%3... data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%2… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%2…data:image/svg+xml,%3Csvg%20xmlns%3... data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2248%22%2… — 200 — 0 B — 0 ms — datahttps://www.webnetz.de/images/pressefotos/logo_webnetz.pngwww.webnetz.de/images/pressefotos/l... https://www.webnetz.de/images/pressefotos/logo_webnetz.png — 200 — 16.0 KiB — 78 ms — h2https://www.webnetz.de/videos/webnetz/wn_mobile.mp4www.webnetz.de/videos/webnetz/wn_mo... https://www.webnetz.de/videos/webnetz/wn_mobile.mp4 — 206 — 27.8 KiB — 40 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3905ms · 311KB · €18/mo
www.webnetz.de
Other
Costly
Execution 1614ms
Transfer 152 KB
Unused 63%
Monthly Cost €8/mo
privacy-proxy.usercentrics.eu
Other
Costly
Execution 744ms
Transfer 30 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 686ms
Transfer 0 KB
Monthly Cost €3/mo
www.webnetz.de
Other
Costly
Execution 675ms
Transfer 54 KB
Monthly Cost €3/mo
web.cmp.usercentrics.eu
Other
Optional
Execution 121ms
Transfer 56 KB
Unused 63%
Monthly Cost €1/mo
web.cmp.usercentrics.eu
Other
Optional
Execution 66ms
Transfer 18 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • www.webnetz.de adds 1614ms and costs ~€8/month
  • privacy-proxy.usercentrics.eu adds 744ms and costs ~€3/month
  • Unattributable adds 686ms and costs ~€3/month
  • www.webnetz.de adds 675ms 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.webnetz.de takes 1614ms 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

63% of www.webnetz.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

privacy-proxy.usercentrics.eu takes 744ms 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 686ms 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.webnetz.de takes 675ms 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

63% of web.cmp.usercentrics.eu'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

Image Optimization
129 images, 249 KB total, 38 KB wasted
INFO

Image Optimization Audit

Total Images

129

Total Size

249 KB

Oversized

9

Wasted

38 KB

16 missing alt text 31 missing dimensions 106 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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