Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

100

Accessibility

Best Practices

SEO

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

649 ms

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

690 ms

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

4 ms

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

0.004

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

5.59 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.

700 ms

Page Load Progression

1.1 s

2.3 s

3.4 s

4.5 s

5.7 s

6.8 s

7.9 s

9.1 s

Checks

9 PASS 2 REVIEW 2 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (227.4 KiB of 227.6 KiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

JS Bundles

20 scripts, 82 KB unused

REVIEW

20 scripts, 82 KB unused

https://verwaltung.bund.de/portal/public/assets/po...: 82 KB unused (37%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 82 KB

82 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780.js	219 KB	82 KB (37%)	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780198.js	1 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780199.js	1 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780203.js	1 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780213.js	0 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780216.js	0 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780197.js	0 KB	—	✓	3rd
https://verwaltung.bund.de/konto/scripts/konto-frontend/konto-frontend.esm.js	0 KB	—	✓	3rd
https://verwaltung.bund.de/leistungsverzeichnis/scripts/lv-search.v3.bundle.js	0 KB	—	✓	3rd
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780186.js	0 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

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

228 KB transferred, 35 requests

PASS

228 KB transferred, 35 requests

Page weighs 700 KB (228 KB transferred)

35 HTTP requests

Estimated 0.05 g CO2 per page load

228 KB transferred

35 requests

0.05 g CO2 per page load

JavaScript 223.0 KiB 98%

HTML 1.9 KiB 1%

Other 1.8 KiB 1%

Other 1.0 KiB 0%

0 2.4 MB 4.9 MB

Under budget

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Image Optimization

No images on this page

PASS

No images on this page

0 images 0 KB

0 oversized -0 KB

0 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

207ms total JS execution

PASS

207ms total JS execution

https://verwaltung.bund.de/portal/public/assets/po...: 138ms CPU time

Unattributable: 69ms CPU time

Third-party scripts: 207ms (100% of total)

Main Thread Breakdown

Script Evaluation 58% Other 35% Style & Layout 4%

Script	Total	Scripting	Parse/Compile	Party
https://verwaltung.bund.de/portal/public/assets/portal-frontend.2.0.0-2933780.js	138ms	118ms	1ms	3rd
Unattributable	69ms	7ms	0ms	3rd

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

Page Weight Inventory

35 resources · 228 KB · 82 KB savings available

PASS

35 resources · 228 KB · 82 KB savings available

Within 1MB page-weight target

Got: 228 KB

~82 KB of savings available

34 third-party resources (100% of weight)

1 resources over 200KB

35 resources · 227.6 KiB · 34 third-party Within 1MB page-weight target

JavaScript 98% · 223.0 KiB

Other 1% · 2.4 KiB

Document 1% · 2.3 KiB

~81.7 KiB of savings available

Remove unused JavaScript: 81.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

35 resources			227.6 KiB

Network Waterfall

35 requests over 9365ms

INFO

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 207ms · 219KB · €2/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
verwaltung.bund.de verwaltung.bund.de	Other	138ms	219 KB	37%	€1/mo	Optional
Unattributable Unattributable	Other	69ms	0 KB	—	€1/mo	Optional

verwaltung.bund.de

Other

Optional

Execution 138ms

Transfer 219 KB

Unused 37%

Monthly Cost €1/mo

Unattributable

Other

Optional

Execution 69ms

Transfer 0 KB

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

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.