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

100

SEO

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

637 ms

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

1.08 s

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

40 ms

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

0.000

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

829 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.23 s

Page Load Progression

404 ms

808 ms

1.2 s

1.6 s

2.0 s

2.4 s

2.8 s

3.2 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 (467.6 KiB of 467.6 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

6 scripts, 76 KB unused

REVIEW

6 scripts, 76 KB unused

https://www.daad.de/_nuxt/header-DR17VLUa.js: 76 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 76 KB

76 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.daad.de/_nuxt/header-DR17VLUa.js	183 KB	76 KB (42%)	✓	3rd
https://www.daad.de/_nuxt/entry-CvhjTcfZ.js	28 KB	—	✓	3rd
https://www.daad.de/_nuxt/CookieModal-C734mL_4.js	5 KB	—	✓	3rd
https://www.daad.de/_nuxt/Stage-BUoqMm_h.js	3 KB	—	✓	3rd
https://www.daad.de/_nuxt/Announcement-_YacdomM.js	1 KB	—	✓	3rd
https://www.daad.de/_nuxt/Alert-ffNMZmCj.js	2 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

468 KB transferred, 28 requests

PASS

468 KB transferred, 28 requests

Page weighs 1.4 MB (468 KB transferred)

28 HTTP requests

Estimated 0.10 g CO2 per page load

468 KB transferred

28 requests

0.10 g CO2 per page load

JavaScript 222.1 KiB 47%

Fonts 99.3 KiB 21%

Images 57.6 KiB 12%

HTML 41.8 KiB 9%

Other 26.8 KiB 6%

CSS 20.1 KiB 4%

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.

Image Optimization

5 images, 0 KB saveable

PASS

5 images, 0 KB saveable

All images are well-optimized

5 images 58 KB

0 oversized -0 KB

3 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

346ms total JS execution

PASS

346ms total JS execution

https://www.daad.de/_nuxt/entry-CvhjTcfZ.js: 174ms CPU time

https://www.daad.de/de/: 97ms CPU time

Unattributable: 75ms CPU time

Third-party scripts: 346ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 27% Style & Layout 14% Parse HTML & CSS 10%

Script	Total	Scripting	Parse/Compile	Party
https://www.daad.de/_nuxt/entry-CvhjTcfZ.js	174ms	144ms	0ms	3rd
https://www.daad.de/de/	97ms	9ms	0ms	3rd
Unattributable	75ms	4ms	0ms	3rd

A+

Font Loading

4 fonts (99 KB)

PASS

4 fonts (99 KB)

4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

99 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

SourceSans3-Regular.DCU... woff2 swap

Size 25 KB

Load time 124 ms

Start 345 ms

Risk FOUT — text flashes from fallback to web font

SourceSans3-Semibold.DZ... woff2 swap

Size 25 KB

Load time 161 ms

Start 346 ms

Risk FOUT — text flashes from fallback to web font

SourceSans3-Light.Da-3M... woff2 swap

Size 25 KB

Load time 161 ms

Start 346 ms

Risk FOUT — text flashes from fallback to web font

SourceSans3-It.BgLRS0hl... woff2 swap

Size 23 KB

Load time 52 ms

Start 547 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

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

28 resources · 468 KB · 76 KB savings available

PASS

28 resources · 468 KB · 76 KB savings available

Within 1MB page-weight target

Got: 468 KB

~76 KB of savings available

26 third-party resources (100% of weight)

28 resources · 467.6 KiB · 26 third-party Within 1MB page-weight target

JavaScript 47% · 222.1 KiB

Font 21% · 99.3 KiB

Image 18% · 83.1 KiB

Document 9% · 42.4 KiB

CSS 4% · 20.1 KiB

Other 0% · 652 B

~76.2 KiB of savings available

Remove unused JavaScript: 76.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

28 resources			467.6 KiB

Network Waterfall

28 requests over 919ms

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 346ms · 70KB · €4/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.daad.de www.daad.de	Other	174ms	28 KB	—	€2/mo	Optional
www.daad.de www.daad.de	Other	97ms	42 KB	—	€1/mo	Optional
Unattributable Unattributable	Other	75ms	0 KB	—	€1/mo	Optional

www.daad.de

Other

Optional

Execution 174ms

Transfer 28 KB

Monthly Cost €2/mo

www.daad.de

Other

Optional

Execution 97ms

Transfer 42 KB

Monthly Cost €1/mo

Unattributable

Other

Optional

Execution 75ms

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.