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https://bzh-freiburg.de

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
6
PASS
15
INFO
3

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

Mobile Desktop
78
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

3.02 s

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

4.64 s

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

41 ms

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

0.002

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

3.02 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.

4.73 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
26
15 PASS 6 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (913.7 KiB of 914.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

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

C
JS Execution Cost
Action
1037ms total JS execution
REVIEW
1037ms total JS execution
Warning::
https://consent.cookiebot.com/uc.js: 424ms CPU time
Warning::
Unattributable: 341ms CPU time
Warning::
https://www.bzh-freiburg.de/en: 273ms CPU time
Warning::
Third-party scripts: 1037ms (100% of total)

Main Thread Breakdown

Script Evaluation 31% Other 24% Style & Layout 22% Rendering 9% Parse HTML & CSS 7% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://consent.cookiebot.com/uc.js424ms310ms12ms3rd
Unattributable341ms5ms0ms3rd
https://www.bzh-freiburg.de/en273ms8ms0ms3rd
B
JS Bundles
7 scripts, 74 KB unused
REVIEW
7 scripts, 74 KB unused
Warning::
https://consent.cookiebot.com/26772e78-659e-4424-a...: 26 KB unused (25%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bzh-freiburg.de/vendor/swiper/swiper-b...: 24 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bzh-freiburg.de/vendor/swiper/swiper-b...: 24 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 74 KB
74 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://consent.cookiebot.com/26772e78-659e-4424-a95b-9b89f6bceb65/cc.js?renew=false&referer=www.bzh-freiburg.de&dnt=false&init=false&culture=en104 KB26 KB (25%)✓3rd
https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.js41 KB24 KB (60%)✓3rd
https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.js0 KB24 KB (60%)✓3rd
https://consent.cookiebot.com/uc.js27 KB—✓3rd
https://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.js1 KB—✓3rd
https://consentcdn.cookiebot.com/consentconfig/26772e78-659e-4424-a95b-9b89f6bceb65/bzh-freiburg.de/configuration.js1 KB—✓3rd
https://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.js0 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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
Page Weight Budget
914 KB transferred, 30 requests
PASS
914 KB transferred, 30 requests
Info::
Page weighs 2.0 MB (914 KB transferred)
Info::
30 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
914 KB / 2.4 MB budget
914 KB transferred
30 requests
0.19 g CO2 per page load
Images 553.8 KiB 61%
JavaScript 173.8 KiB 19%
Fonts 131.1 KiB 14%
HTML 46.9 KiB 5%
CSS 5.1 KiB 1%
Other 1.4 KiB 0%
Other 1.2 KiB 0%
Other 833 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
11 images, 0 KB saveable
PASS
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 554 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (131 KB)
PASS
3 fonts (131 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

131 KB total

Render-blocking

0

of 3

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 3.0 s LCP 4.6 shttps://www.bzh-freiburg.de/fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2dbcfebeb-81b6-4dd3-912a... https://www.bzh-freiburg.de/fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2 — 51.3 KiB — 79 ms — font-display: swaphttps://www.bzh-freiburg.de/fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff23a9dc726-d61e-48d0-86ba... https://www.bzh-freiburg.de/fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff2 — 31.9 KiB — 78 ms — font-display: swaphttps://www.bzh-freiburg.de/fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff23ca076a2-34ad-4c48-a029... https://www.bzh-freiburg.de/fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff2 — 47.9 KiB — 76 ms — font-display: swap
dbcfebeb-81b6-4dd3-912a... woff2 swap
Size 51 KB
Load time 79 ms
Start 391 ms
Risk FOUT — text flashes from fallback to web font
3a9dc726-d61e-48d0-86ba... woff2 swap
Size 32 KB
Load time 78 ms
Start 392 ms
Risk FOUT — text flashes from fallback to web font
3ca076a2-34ad-4c48-a029... woff2 swap
Size 48 KB
Load time 76 ms
Start 392 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Warning::
3 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: /fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2, /fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff2, /fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
4
dns-prefetch
—
prefetch
—

4 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: /fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2, /fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff2, /fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff2. 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+
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
Page Weight Inventory
30 resources · 914 KB · 74 KB savings available
PASS
30 resources · 914 KB · 74 KB savings available
Info::
Within 1MB page-weight target
Got: 914 KB
Info::
~74 KB of savings available
Warning::
29 third-party resources (100% of weight)
30 resources · 914.0 KiB · 29 third-party Within 1MB page-weight target
Image 61% · 554.8 KiB
JavaScript 19% · 173.8 KiB
Font 14% · 131.1 KiB
Document 5% · 47.3 KiB
CSS 1% · 5.1 KiB
Other 0% · 2.0 KiB

~74.5 KiB of savings available

Remove unused JavaScript: 74.5 KiB
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
2 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.
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
1 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
30 requests over 754ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.0 s LCP 4.6 shttps://bzh-freiburg.de// https://bzh-freiburg.de/ — 301 — 365 B — 113 ms — h2https://www.bzh-freiburg.de/www.bzh-freiburg.de/ https://www.bzh-freiburg.de/ — 301 — 50 B — 78 ms — h2https://www.bzh-freiburg.de/enwww.bzh-freiburg.de/en https://www.bzh-freiburg.de/en — 200 — 45.9 KiB — 247 ms — h2https://www.bzh-freiburg.de/css/bfh.css?v=0.0.8www.bzh-freiburg.de/css/bfh.css?v=0... https://www.bzh-freiburg.de/css/bfh.css?v=0.0.8 — 200 — 5.1 KiB — 49 ms — h2https://www.bzh-freiburg.de/fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2www.bzh-freiburg.de/fonts/dbcfebeb-... https://www.bzh-freiburg.de/fonts/dbcfebeb-81b6-4dd3-912a-c4fc1bb8b8dc.woff2 — 200 — 51.3 KiB — 79 ms — h2https://www.bzh-freiburg.de/fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff2www.bzh-freiburg.de/fonts/3a9dc726-... https://www.bzh-freiburg.de/fonts/3a9dc726-d61e-48d0-86ba-9548f35b5625.woff2 — 200 — 31.9 KiB — 78 ms — h2https://www.bzh-freiburg.de/fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff2www.bzh-freiburg.de/fonts/3ca076a2-... https://www.bzh-freiburg.de/fonts/3ca076a2-34ad-4c48-a029-02536a509f22.woff2 — 200 — 47.9 KiB — 76 ms — h2https://consent.cookiebot.com/uc.jsconsent.cookiebot.com/uc.js https://consent.cookiebot.com/uc.js — 200 — 27.2 KiB — 57 ms — http/1.1https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.jswww.bzh-freiburg.de/vendor/swiper/s... https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.js — 200 — 40.9 KiB — 56 ms — h2https://consentcdn.cookiebot.com/consentconfig/26772e78-659e-4424-a95b-9b89f6bceb65/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/26772e78-659e-4424-a95b-9b89f6bceb65/settings.json — 200 — 1.2 KiB — 64 ms — http/1.1https://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.jswww.bzh-freiburg.de/scripts/bzh_cus... https://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.js — 200 — 575 B — 32 ms — h2https://consentcdn.cookiebot.com/consentconfig/26772e78-659e-4424-a95b-9b89f6bceb65/bzh-freiburg.de/configuration.jsconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/26772e78-659e-4424-a95b-9b89f6bceb65/bzh-freiburg.de/configuration.js — 200 — 1.4 KiB — 58 ms — http/1.1https://consent.cookiebot.com/26772e78-659e-4424-a95b-9b89f6bceb65/cc.js?renew=false&referer=www.bzh-freiburg.de&dnt=false&init=false&culture=enconsent.cookiebot.com/26772e78-659e... https://consent.cookiebot.com/26772e78-659e-4424-a95b-9b89f6bceb65/cc.js?renew=false&referer=www.bzh-freiburg.de&dnt=false&init=false&culture=en — 200 — 103.7 KiB — 84 ms — http/1.1https://www.bzh-freiburg.de/img/background-variant-one.svgwww.bzh-freiburg.de/img/background-... https://www.bzh-freiburg.de/img/background-variant-one.svg — 200 — 45.1 KiB — 35 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/2383/image-thumb__2383__heroSliderImage/Pagehero%20Vorlage%20960%20x%20540%20%281%29_3~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/2383/image-thumb__2383__heroSliderImage/Pagehero%20Vorlage%20960%20x%20540%20%281%29_3~-~media--4781c592--query@2x.avif — 200 — 72.2 KiB — 63 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/2367/image-thumb__2367__heroSliderImage/Kongresser%C3%B6ffnung%20%285%29~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/2367/image-thumb__2367__heroSliderImage/Kongresser%C3%B6ffnung%20%285%29~-~media--4781c592--query@2x.avif — 200 — 62.8 KiB — 63 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/1925/image-thumb__1925__heroSliderImage/Pagehero-Vinzenz_Video~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/1925/image-thumb__1925__heroSliderImage/Pagehero-Vinzenz_Video~-~media--4781c592--query@2x.avif — 200 — 58.4 KiB — 65 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/2069/image-thumb__2069__heroSliderImage/Kongressbericht%201~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/2069/image-thumb__2069__heroSliderImage/Kongressbericht%201~-~media--4781c592--query@2x.avif — 200 — 109.5 KiB — 64 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/2072/image-thumb__2072__heroSliderImage/Kongressbericht%202%20%281%29~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/2072/image-thumb__2072__heroSliderImage/Kongressbericht%202%20%281%29~-~media--4781c592--query@2x.avif — 200 — 106.4 KiB — 62 ms — h2https://www.bzh-freiburg.de/favicon//site.webmanifestwww.bzh-freiburg.de/favicon//site.w... https://www.bzh-freiburg.de/favicon//site.webmanifest — 200 — 833 B — 107 ms — h2data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' height='40' width='35' v…www.w3.org/2000/svg' height='40' wi... data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' height='40' width='35' v… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' height='40' width='35' v…www.w3.org/2000/svg' height='40' wi... data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' height='40' width='35' v… — 200 — 0 B — 0 ms — datahttps://consentcdn.cookiebot.com/sdk/bc-v4.min.htmlconsentcdn.cookiebot.com/sdk/bc-v4.... https://consentcdn.cookiebot.com/sdk/bc-v4.min.html — 200 — 1.0 KiB — 10 ms — http/1.1https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.jswww.bzh-freiburg.de/vendor/swiper/s... https://www.bzh-freiburg.de/vendor/swiper/swiper-bundle.min.js — 200 — 0 B — 4 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAAuCAYAAACmsnC6AAAAAXNSR0IArs4c6QAAAARnQU1BAACxj…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACEAAAAuCAYAAACmsnC6AAAAAXNSR0IArs4c6QAAAARnQU1BAACxj… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAA… — 200 — 0 B — 0 ms — datahttps://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.jswww.bzh-freiburg.de/scripts/bzh_cus... https://www.bzh-freiburg.de/scripts/bzh_custom_footer-script.js — 200 — 0 B — 2 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/2067/image-thumb__2067__heroSliderImage/Pagehero-News%2008-2.2023%20%281%29_2~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/2067/image-thumb__2067__heroSliderImage/Pagehero-News%2008-2.2023%20%281%29_2~-~media--4781c592--query@2x.avif — 200 — 27.8 KiB — 34 ms — h2https://www.bzh-freiburg.de/_default_upload_bucket/1704/image-thumb__1704__heroSliderImage/Pagehero-News_Netzwerk-Suedbaden~-~media--4781c592--query@2x.avifwww.bzh-freiburg.de/_default_upload... https://www.bzh-freiburg.de/_default_upload_bucket/1704/image-thumb__1704__heroSliderImage/Pagehero-News_Netzwerk-Suedbaden~-~media--4781c592--query@2x.avif — 200 — 71.6 KiB — 35 ms — h2https://www.bzh-freiburg.de/favicon//favicon-32x32.pngwww.bzh-freiburg.de/favicon//favico... https://www.bzh-freiburg.de/favicon//favicon-32x32.png — 200 — 1.0 KiB — 32 ms — h2
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 1037ms · 73KB · €11/mo
consent.cookiebot.com
Other
Costly
Execution 424ms
Transfer 27 KB
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 341ms
Transfer 0 KB
Monthly Cost €4/mo
www.bzh-freiburg.de
Other
Costly
Execution 273ms
Transfer 46 KB
Monthly Cost €3/mo

These scripts may cost more than they're worth

  • consent.cookiebot.com adds 424ms and costs ~€5/month
  • Unattributable adds 341ms and costs ~€4/month
  • www.bzh-freiburg.de adds 273ms 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

consent.cookiebot.com takes 424ms 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 341ms 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.bzh-freiburg.de takes 273ms 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

How third-party costs are calculated

Image Optimization
14 images, 508 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

14

Total Size

508 KB

Oversized

1

7 missing alt text 6 missing dimensions 6 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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