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https://baden-wuerttemberg.de

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
4
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
85
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.
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.

1.13 s

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

2.24 s

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

7 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.

1.39 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.

2.48 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
7 PASS 2 REVIEW 4 FIX
D
Page Weight Budget
Action
2.3 MB transferred, 26 requests
FIX
2.3 MB transferred, 26 requests
Info::
Page weighs 6.9 MB (2.3 MB transferred)
Warning::
JavaScript is 644 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 644 KB
Info::
CSS is 233 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 233 KB
Info::
26 HTTP requests
Info::
Estimated 0.47 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
26 requests
0.47 g CO2 per page load
Images 779.3 KiB 34%
JavaScript 643.6 KiB 28%
Other 395.2 KiB 17%
CSS 233.2 KiB 10%
HTML 148.9 KiB 6%
Fonts 108.7 KiB 5%
Other 1.1 KiB 0%
Other 627 B 0%
Other 269 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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 (2.3 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
4 scripts, 470 KB unused
FIX
4 scripts, 470 KB unused
Warning::
https://assets.baden-wuerttemberg.de/versions/5.1....: 449 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://piwik.baden-wuerttemberg.de/matomo.js: 21 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 470 KB
470 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/main.js?v=5.1.0602 KB449 KB (76%)✓3rd
https://piwik.baden-wuerttemberg.de/matomo.js41 KB21 KB (52%)✓3rd
https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/head.js1 KB—✓3rd
https://piwik.baden-wuerttemberg.de/plugins/HeatmapSessionRecording/configs.php?idsite=1&trackerid=0wjomY&url=https%3A%2F%2Fwww.baden-wuerttemberg.de%2Fde%2Fstartseite0 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

F
Page Weight Inventory
Action
26 resources · 2.3 MB · 470 KB savings available
FIX
26 resources · 2.3 MB · 470 KB savings available
Warning::
Page weight 1.3 MB over 1MB target
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~470 KB of savings available
Warning::
25 third-party resources (100% of weight)
Info::
4 resources over 200KB
26 resources · 2.3 MiB · 25 third-party 1.3 MiB over 1MB target
Image 51% · 1.1 MiB
JavaScript 28% · 643.6 KiB
CSS 10% · 233.2 KiB
Document 6% · 148.9 KiB
Font 5% · 108.7 KiB
Other 0% · 973 B

~470.4 KiB of savings available

Remove unused JavaScript: 470.4 KiB
C
Image Optimization
Action
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://assets.baden-wuerttemberg.de/versions/5.1.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 779 KB
0 oversized -0 KB
8 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

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

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
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+
JS Execution Cost
346ms total JS execution
PASS
346ms total JS execution
Info::
https://assets.baden-wuerttemberg.de/versions/5.1....: 139ms CPU time
Info::
https://www.baden-wuerttemberg.de/de/startseite: 116ms CPU time
Info::
https://piwik.baden-wuerttemberg.de/matomo.js: 91ms CPU time
Warning::
Third-party scripts: 346ms (100% of total)

Main Thread Breakdown

Script Evaluation 38% Style & Layout 20% Other 19% Script Parsing & Compilation 11% Parse HTML & CSS 8% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/main.js?v=5.1.0139ms82ms42ms3rd
https://www.baden-wuerttemberg.de/de/startseite116ms3ms0ms3rd
https://piwik.baden-wuerttemberg.de/matomo.js91ms71ms3ms3rd
A+
Font Loading
4 fonts (109 KB)
PASS
4 fonts (109 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

109 KB total

Render-blocking

0

of 4

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 2.0 s FCP 1.1 s LCP 2.2 shttps://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Regular.woff2BaWueSansWeb-Regular.woff2 https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Regular.woff2 — 23.8 KiB — 144 ms — font-display: swaphttps://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Bold.woff2BaWueSansWeb-Bold.woff2 https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Bold.woff2 — 23.8 KiB — 116 ms — font-display: swaphttps://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Regular.woff2BaWueSerifWeb-Regular.w... https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Regular.woff2 — 29.9 KiB — 140 ms — font-display: swaphttps://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Bold.woff2BaWueSerifWeb-Bold.woff2 https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Bold.woff2 — 31.2 KiB — 162 ms — font-display: swap
BaWueSansWeb-Regular.woff2 woff2 swap
Size 24 KB
Load time 144 ms
Start 290 ms
Risk FOUT — text flashes from fallback to web font
BaWueSansWeb-Bold.woff2 woff2 swap
Size 24 KB
Load time 116 ms
Start 292 ms
Risk FOUT — text flashes from fallback to web font
BaWueSerifWeb-Regular.w... woff2 swap
Size 30 KB
Load time 140 ms
Start 292 ms
Risk FOUT — text flashes from fallback to web font
BaWueSerifWeb-Bold.woff2 woff2 swap
Size 31 KB
Load time 162 ms
Start 293 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Internet AG

Network Waterfall
26 requests over 1046ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.1 s LCP 2.2 shttps://baden-wuerttemberg.de// https://baden-wuerttemberg.de/ — 302 — 77 B — 78 ms — h2https://www.baden-wuerttemberg.de/de/startseitewww.baden-wuerttemberg.de/de/starts... https://www.baden-wuerttemberg.de/de/startseite — 200 — 148.9 KiB — 251 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/main.css?v=5.1.0assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/main.css?v=5.1.0 — 200 — 120.5 KiB — 160 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/head.jsassets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/head.js — 200 — 645 B — 158 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Regular.woff2assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Regular.woff2 — 200 — 23.8 KiB — 144 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Bold.woff2assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSansWeb-Bold.woff2 — 200 — 23.8 KiB — 116 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Regular.woff2assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Regular.woff2 — 200 — 29.9 KiB — 140 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Bold.woff2assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/fonts/BaWueSerifWeb-Bold.woff2 — 200 — 31.2 KiB — 162 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/6/e/csm_Header-zweigeteilt_stock.adobe.com-Kellmann-Art-tichr_stock.adobe.com_4000x3000_442a3ec2c4.jpgwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/6/e/csm_Header-zweigeteilt_stock.adobe.com-Kellmann-Art-tichr_stock.adobe.com_4000x3000_442a3ec2c4.jpg — 200 — 323.4 KiB — 86 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/media/images/logos/logo-lp_de.svgassets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/media/images/logos/logo-lp_de.svg — 200 — 28.9 KiB — 83 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/main.js?v=5.1.0assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/javascripts/main.js?v=5.1.0 — 200 — 601.7 KiB — 136 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/print.css?v=5.1.0assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/print.css?v=5.1.0 — 200 — 112.7 KiB — 76 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/media/icons/icons.svgassets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/media/icons/icons.svg — 200 — 395.2 KiB — 89 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/c/6/csm_260413_MP_UM_Nationalpark_KAT_062_2434x1310_37145b2fe9.jpgwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/c/6/csm_260413_MP_UM_Nationalpark_KAT_062_2434x1310_37145b2fe9.jpg — 200 — 227.7 KiB — 43 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/7/8/csm_Landtag_Plenum_Plenarsaal_2434x1310_2037b79196.jpgwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/7/8/csm_Landtag_Plenum_Plenarsaal_2434x1310_2037b79196.jpg — 200 — 69.9 KiB — 45 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/5/8/csm_190903_Radweg_dpa_2434x1310_d2939202fb.jpgwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/5/8/csm_190903_Radweg_dpa_2434x1310_d2939202fb.jpg — 200 — 74.9 KiB — 49 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/9/c/csm_241017_Logo-Beteiligungsportal-transparent_2434x1310_7194fc72e3.pngwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/9/c/csm_241017_Logo-Beteiligungsportal-transparent_2434x1310_7194fc72e3.png — 200 — 21.7 KiB — 61 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/3/3/csm_250204_Logo-Serviceportal-BW_2434x1310_7f21f3c90f.jpgwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/3/3/csm_250204_Logo-Serviceportal-BW_2434x1310_7f21f3c90f.jpg — 200 — 24.2 KiB — 52 ms — h2https://www.baden-wuerttemberg.de/fileadmin/_processed_/1/a/csm_251017_Logo-The-Laend_550x215_f35cef9a81.pngwww.baden-wuerttemberg.de/fileadmin... https://www.baden-wuerttemberg.de/fileadmin/_processed_/1/a/csm_251017_Logo-The-Laend_550x215_f35cef9a81.png — 200 — 8.6 KiB — 51 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/media/favicon/site.webmanifestassets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/media/favicon/site.webmanifest — 200 — 627 B — 28 ms — h2https://piwik.baden-wuerttemberg.de/matomo.jspiwik.baden-wuerttemberg.de/matomo.... https://piwik.baden-wuerttemberg.de/matomo.js — 200 — 40.9 KiB — 137 ms — h2https://piwik.baden-wuerttemberg.de/matomo.php?action_name=Startseite%3A%20Baden-W%C3%BCrttemberg.de&idsite=1&rec=1&r=439697&h=22&m=4&s=46&url=https%3A%2F%2Fwww.baden-wuerttemberg.de%2Fde%2Fstartseite&_id=&_idn=1&send_image=0&_refts=0&pv_id=FS5TEw&pf_net=0&pf_srv=198&pf_tfr=52&pf_dm1=425&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.101%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600piwik.baden-wuerttemberg.de/matomo.... https://piwik.baden-wuerttemberg.de/matomo.php?action_name=Startseite%3A%20Baden-W%C3%BCrttemberg.de&idsite=1&rec=1&r=439697&h=22&m=4&s=46&url=https%3A%2F%2Fwww.baden-wuerttemberg.de%2Fde%2Fstartseite&_id=&_idn=1&send_image=0&_refts=0&pv_id=FS5TEw&pf_net=0&pf_srv=198&pf_tfr=52&pf_dm1=425&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22147.0.7727.101%22%7D%2C%7B%22brand%22%3A%22Not.A%2FBrand%22%2C%22version%22%3A%228.0.0.0%22%7D%5D%2C%22mobile%22%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600 — 204 — 269 B — 210 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/media/favicon/favicon-32x32.pngassets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/media/favicon/favicon-32x32.png — 200 — 1.0 KiB — 29 ms — h2https://piwik.baden-wuerttemberg.de/plugins/HeatmapSessionRecording/configs.php?idsite=1&trackerid=0wjomY&url=https%3A%2F%2Fwww.baden-wuerttemberg.de%2Fde%2Fstartseitepiwik.baden-wuerttemberg.de/plugins... https://piwik.baden-wuerttemberg.de/plugins/HeatmapSessionRecording/configs.php?idsite=1&trackerid=0wjomY&url=https%3A%2F%2Fwww.baden-wuerttemberg.de%2Fde%2Fstartseite — 200 — 375 B — 53 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/main.css?v=5.1.0assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/main.css?v=5.1.0 — 200 — 0 B — 7 ms — h2https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/print.css?v=5.1.0assets.baden-wuerttemberg.de/versio... https://assets.baden-wuerttemberg.de/versions/5.1.0/stylesheets/print.css?v=5.1.0 — 200 — 0 B — 6 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 346ms · 792KB · €4/mo
assets.baden-wuerttemberg.de
Other
Optional
Execution 139ms
Transfer 602 KB
Unused 76%
Monthly Cost €2/mo
www.baden-wuerttemberg.de
Other
Optional
Execution 116ms
Transfer 149 KB
Monthly Cost €1/mo
piwik.baden-wuerttemberg.de
Other
Optional
Execution 91ms
Transfer 41 KB
Unused 52%
Monthly Cost €1/mo

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

76% of assets.baden-wuerttemberg.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

52% of piwik.baden-wuerttemberg.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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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