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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.

1.18 s

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

4.34 s

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

25 ms

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

0.439

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

1.71 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.

4.42 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
5 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
4.8 MB transferred, 56 requests
FIX
4.8 MB transferred, 56 requests
Critical::
Page weighs 6.8 MB (4.8 MB transferred)
Warning::
Images are 3.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.7 MB
Info::
56 HTTP requests
Info::
Estimated 1.00 g CO2 per page load
4.8 MB / 2.4 MB budget
4.8 MB transferred
56 requests
1.00 g CO2 per page load
Images 3.7 MiB 78%
HTML 418.9 KiB 9%
JavaScript 332.7 KiB 7%
CSS 136.4 KiB 3%
Fonts 117.7 KiB 2%
Other 55.4 KiB 1%
Other 13.1 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

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 (4.8 MiB of 4.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
56 resources · 4.8 MB · 131 KB savings available
FIX
56 resources · 4.8 MB · 131 KB savings available
Warning::
Page weight 3.8 MB over 1MB target
Got: 4.8 MB Expected: ≤ 1 MB
Info::
~131 KB of savings available
Warning::
55 third-party resources (100% of weight)
Info::
7 resources over 200KB
56 resources · 4.8 MiB · 55 third-party 3.8 MiB over 1MB target
Image 78% · 3.7 MiB
Document 9% · 422.6 KiB
JavaScript 7% · 332.7 KiB
CSS 3% · 136.4 KiB
Font 2% · 117.7 KiB
Other 1% · 55.4 KiB

~130.5 KiB of savings available

Remove unused JavaScript: 130.5 KiB
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
Image Optimization
Action
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Warning::
https://static1.bmbfcluster.de/6/5/9/9/8_257b0a7a2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/1/5/4/9_ed208eafc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/4/5/3/8/2_ba8e499e0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/1/5/5/0_a8386a2a6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/1/3/3/6_59eb965a0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bmftr.bund.de/SharedDocs/Bilder/DE/Bil... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/4/9/0/0_503d05ced... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/5/8/2/5_48d209839... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/6/0/1/8_82cd77e91... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/6/0/1/9_6cd68a364... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/0/8/5/8_e4d7bc9a9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.bmbfcluster.de/6/6/0/4/8_7d57c239d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
16 images 3.7 MB
0 oversized -0 KB
16 legacy format
13 missing dimensions CLS risk

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

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

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

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

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

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

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

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

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

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

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

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

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
JS Execution Cost
549ms total JS execution
REVIEW
549ms total JS execution
Info::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Jav...: 246ms CPU time
Info::
https://www.bmftr.bund.de/DE/Home/home_node.html: 168ms CPU time
Info::
Unattributable: 84ms CPU time
Info::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Jav...: 51ms CPU time
Warning::
Third-party scripts: 549ms (100% of total)

Main Thread Breakdown

Script Evaluation 34% Style & Layout 26% Other 23% Script Parsing & Compilation 7% Parse HTML & CSS 5% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8246ms142ms35ms3rd
https://www.bmftr.bund.de/DE/Home/home_node.html168ms2ms0ms3rd
Unattributable84ms2ms0ms3rd
https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/bundle_slideshow.js?v=651ms45ms4ms3rd
C
JS Bundles
Action
3 scripts, 131 KB unused
REVIEW
3 scripts, 131 KB unused
Warning::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Jav...: 131 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Jav...: unminified — 80 KB could be saved
Warning::
https://www.bmftr.bund.de/SiteGlobals/Frontend/Jav...: unminified — 9 KB could be saved
Info::
Total unused JavaScript: 131 KB
131 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8285 KB131 KB (46%)✗3rd
https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/webReader.js?v=6&pids=wr22 KB—✓3rd
https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/bundle_slideshow.js?v=625 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

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

Green Hosting

No green hosting detected

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
3 fonts (118 KB)
PASS
3 fonts (118 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

118 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 1.2 s LCP 4.3 shttps://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woffBundesSansWeb-Regular.woff https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woff — 38.7 KiB — 37 ms — font-display: swaphttps://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woffBundesSansWeb-RegularIt... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woff — 39.8 KiB — 70 ms — font-display: swaphttps://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woffBundesSansWeb-Bold.woff https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woff — 39.2 KiB — 67 ms — font-display: swap
BundesSansWeb-Regular.woff woff swap
Size 39 KB
Load time 37 ms
Start 488 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
BundesSansWeb-RegularIt... woff swap
Size 40 KB
Load time 70 ms
Start 502 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
BundesSansWeb-Bold.woff woff swap
Size 39 KB
Load time 67 ms
Start 503 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~35 KB and ~70 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
56 requests over 1029ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 4.3 shttps://bmbf.de// https://bmbf.de/ — 301 — 500 B — 101 ms — http/1.1https://www.bmftr.bund.de/www.bmftr.bund.de/ https://www.bmftr.bund.de/ — 302 — 3.2 KiB — 111 ms — http/1.1https://www.bmftr.bund.de/DE/Home/home_node.htmlwww.bmftr.bund.de/DE/Home/home_node... https://www.bmftr.bund.de/DE/Home/home_node.html — 200 — 418.9 KiB — 161 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/_libs.css?v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/_libs.css?v=4 — 200 — 17.4 KiB — 129 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/small.css?v=25www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/small.css?v=25 — 200 — 29.7 KiB — 135 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/medium.css?v=17www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/medium.css?v=17 — 200 — 7.7 KiB — 105 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/large.css?v=18www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/large.css?v=18 — 200 — 9.8 KiB — 108 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xlarge.css?v=12www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xlarge.css?v=12 — 200 — 5.0 KiB — 109 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxlarge.css?v=9www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxlarge.css?v=9 — 200 — 3.8 KiB — 141 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxlarge.css?v=8www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxlarge.css?v=8 — 200 — 3.5 KiB — 146 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxxlarge.css?v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxxlarge.css?v=7 — 200 — 3.2 KiB — 144 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/custom.css?v=51www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/custom.css?v=51 — 200 — 3.6 KiB — 152 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_usability.css?v=11www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_usability.css?v=11 — 200 — 9.3 KiB — 164 ms — http/1.1https://static1.bmbfcluster.de/6/5/8/2/5_48d20983952bca5/65825teg_e028366a6ae358e.jpgstatic1.bmbfcluster.de/6/5/8/2/5_48... https://static1.bmbfcluster.de/6/5/8/2/5_48d20983952bca5/65825teg_e028366a6ae358e.jpg — 200 — 73.1 KiB — 155 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/4/8_7d57c239da85fb6/66048teg_18c8c9b6a8d73a8.jpgstatic1.bmbfcluster.de/6/6/0/4/8_7d... https://static1.bmbfcluster.de/6/6/0/4/8_7d57c239da85fb6/66048teg_18c8c9b6a8d73a8.jpg — 200 — 225.4 KiB — 202 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/1/8_82cd77e9176c040/66018teg_a307d5209bd322d.jpgstatic1.bmbfcluster.de/6/6/0/1/8_82... https://static1.bmbfcluster.de/6/6/0/1/8_82cd77e9176c040/66018teg_a307d5209bd322d.jpg — 200 — 145.6 KiB — 181 ms — http/1.1https://static1.bmbfcluster.de/6/5/9/9/8_257b0a7a2e48a69/65998teg_3c98cb8765eb3f7.jpgstatic1.bmbfcluster.de/6/5/9/9/8_25... https://static1.bmbfcluster.de/6/5/9/9/8_257b0a7a2e48a69/65998teg_3c98cb8765eb3f7.jpg — 200 — 162.1 KiB — 188 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/1/9_6cd68a36424ff13/66019teg_e98a1ecf92ba193.jpgstatic1.bmbfcluster.de/6/6/0/1/9_6c... https://static1.bmbfcluster.de/6/6/0/1/9_6cd68a36424ff13/66019teg_e98a1ecf92ba193.jpg — 200 — 289.3 KiB — 207 ms — http/1.1https://static1.bmbfcluster.de/6/1/3/3/6_59eb965a0e29d64/61336teg_032ecd452b9a519.jpgstatic1.bmbfcluster.de/6/1/3/3/6_59... https://static1.bmbfcluster.de/6/1/3/3/6_59eb965a0e29d64/61336teg_032ecd452b9a519.jpg — 200 — 375.7 KiB — 209 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8 — 200 — 285.1 KiB — 129 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo.svg?__blob=normal&v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo.svg?__blob=normal&v=7 — 200 — 9.9 KiB — 39 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo-dark.svg?__blob=normal&v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo-dark.svg?__blob=normal&v=7 — 200 — 9.9 KiB — 38 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/webReader.js?v=6&pids=wrwww.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/webReader.js?v=6&pids=wr — 200 — 22.2 KiB — 45 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Bilder/DE/Bilder/wissenschaftsjahr-2026.png?__blob=normal&v=1www.bmftr.bund.de/SharedDocs/Bilder... https://www.bmftr.bund.de/SharedDocs/Bilder/DE/Bilder/wissenschaftsjahr-2026.png?__blob=normal&v=1 — 200 — 1.7 MiB — 131 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/sprite.svg?__blob=normal&v=5www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/sprite.svg?__blob=normal&v=5 — 200 — 9.5 KiB — 40 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/inline-svg/network.svg?__blob=normal&v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/inline-svg/network.svg?__blob=normal&v=4 — 200 — 4.0 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_print.css?v=9www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_print.css?v=9 — 200 — 4.8 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woff — 200 — 38.7 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woff — 200 — 39.8 KiB — 70 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woff — 200 — 39.2 KiB — 67 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 4.3 shttps://bmbf.de// https://bmbf.de/ — 301 — 500 B — 101 ms — http/1.1https://www.bmftr.bund.de/www.bmftr.bund.de/ https://www.bmftr.bund.de/ — 302 — 3.2 KiB — 111 ms — http/1.1https://www.bmftr.bund.de/DE/Home/home_node.htmlwww.bmftr.bund.de/DE/Home/home_node... https://www.bmftr.bund.de/DE/Home/home_node.html — 200 — 418.9 KiB — 161 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/_libs.css?v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/_libs.css?v=4 — 200 — 17.4 KiB — 129 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/small.css?v=25www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/small.css?v=25 — 200 — 29.7 KiB — 135 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/medium.css?v=17www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/medium.css?v=17 — 200 — 7.7 KiB — 105 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/large.css?v=18www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/large.css?v=18 — 200 — 9.8 KiB — 108 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xlarge.css?v=12www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xlarge.css?v=12 — 200 — 5.0 KiB — 109 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxlarge.css?v=9www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxlarge.css?v=9 — 200 — 3.8 KiB — 141 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxlarge.css?v=8www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxlarge.css?v=8 — 200 — 3.5 KiB — 146 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxxlarge.css?v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/xxxxlarge.css?v=7 — 200 — 3.2 KiB — 144 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/custom.css?v=51www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/custom.css?v=51 — 200 — 3.6 KiB — 152 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_usability.css?v=11www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_usability.css?v=11 — 200 — 9.3 KiB — 164 ms — http/1.1https://static1.bmbfcluster.de/6/5/8/2/5_48d20983952bca5/65825teg_e028366a6ae358e.jpgstatic1.bmbfcluster.de/6/5/8/2/5_48... https://static1.bmbfcluster.de/6/5/8/2/5_48d20983952bca5/65825teg_e028366a6ae358e.jpg — 200 — 73.1 KiB — 155 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/4/8_7d57c239da85fb6/66048teg_18c8c9b6a8d73a8.jpgstatic1.bmbfcluster.de/6/6/0/4/8_7d... https://static1.bmbfcluster.de/6/6/0/4/8_7d57c239da85fb6/66048teg_18c8c9b6a8d73a8.jpg — 200 — 225.4 KiB — 202 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/1/8_82cd77e9176c040/66018teg_a307d5209bd322d.jpgstatic1.bmbfcluster.de/6/6/0/1/8_82... https://static1.bmbfcluster.de/6/6/0/1/8_82cd77e9176c040/66018teg_a307d5209bd322d.jpg — 200 — 145.6 KiB — 181 ms — http/1.1https://static1.bmbfcluster.de/6/5/9/9/8_257b0a7a2e48a69/65998teg_3c98cb8765eb3f7.jpgstatic1.bmbfcluster.de/6/5/9/9/8_25... https://static1.bmbfcluster.de/6/5/9/9/8_257b0a7a2e48a69/65998teg_3c98cb8765eb3f7.jpg — 200 — 162.1 KiB — 188 ms — http/1.1https://static1.bmbfcluster.de/6/6/0/1/9_6cd68a36424ff13/66019teg_e98a1ecf92ba193.jpgstatic1.bmbfcluster.de/6/6/0/1/9_6c... https://static1.bmbfcluster.de/6/6/0/1/9_6cd68a36424ff13/66019teg_e98a1ecf92ba193.jpg — 200 — 289.3 KiB — 207 ms — http/1.1https://static1.bmbfcluster.de/6/1/3/3/6_59eb965a0e29d64/61336teg_032ecd452b9a519.jpgstatic1.bmbfcluster.de/6/1/3/3/6_59... https://static1.bmbfcluster.de/6/1/3/3/6_59eb965a0e29d64/61336teg_032ecd452b9a519.jpg — 200 — 375.7 KiB — 209 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/global.js?v=8 — 200 — 285.1 KiB — 129 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo.svg?__blob=normal&v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo.svg?__blob=normal&v=7 — 200 — 9.9 KiB — 39 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo-dark.svg?__blob=normal&v=7www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/images/logo-dark.svg?__blob=normal&v=7 — 200 — 9.9 KiB — 38 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/webReader.js?v=6&pids=wrwww.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/webReader.js?v=6&pids=wr — 200 — 22.2 KiB — 45 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Bilder/DE/Bilder/wissenschaftsjahr-2026.png?__blob=normal&v=1www.bmftr.bund.de/SharedDocs/Bilder... https://www.bmftr.bund.de/SharedDocs/Bilder/DE/Bilder/wissenschaftsjahr-2026.png?__blob=normal&v=1 — 200 — 1.7 MiB — 131 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/sprite.svg?__blob=normal&v=5www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/sprite.svg?__blob=normal&v=5 — 200 — 9.5 KiB — 40 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/inline-svg/network.svg?__blob=normal&v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/inline-svg/network.svg?__blob=normal&v=4 — 200 — 4.0 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_print.css?v=9www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Styles/addon_print.css?v=9 — 200 — 4.8 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Regular.woff — 200 — 38.7 KiB — 37 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-RegularItalic.woff — 200 — 39.8 KiB — 70 ms — http/1.1https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woffwww.bmftr.bund.de/static/fonts/Bund... https://www.bmftr.bund.de/static/fonts/BundesSchrift-v3/BundesSansWeb-Bold.woff — 200 — 39.2 KiB — 67 ms — 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https://www.bmftr.bund.de/SharedDocs/Icons/gesundheit_animiert.json?__blob=publicationFile&v=2 — 200 — 4.8 KiB — 48 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/gesundheit_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/gesundheit_animiert.json?__blob=publicationFile&v=2 — 200 — 0 B — 52 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/international_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/international_animiert.json?__blob=publicationFile&v=2 — 200 — 13.9 KiB — 52 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/international_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/international_animiert.json?__blob=publicationFile&v=2 — 200 — 0 B — 53 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/gesellschaft_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/gesellschaft_animiert.json?__blob=publicationFile&v=2 — 200 — 4.5 KiB — 52 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/gesellschaft_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/gesellschaft_animiert.json?__blob=publicationFile&v=2 — 200 — 0 B — 52 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/bildung-eu_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/bildung-eu_animiert.json?__blob=publicationFile&v=2 — 200 — 6.0 KiB — 87 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/bildung-eu_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/bildung-eu_animiert.json?__blob=publicationFile&v=2 — 200 — 0 B — 89 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/eu-forschung_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/eu-forschung_animiert.json?__blob=publicationFile&v=2 — 200 — 5.3 KiB — 89 ms — http/1.1https://www.bmftr.bund.de/SharedDocs/Icons/eu-forschung_animiert.json?__blob=publicationFile&v=2www.bmftr.bund.de/SharedDocs/Icons/... https://www.bmftr.bund.de/SharedDocs/Icons/eu-forschung_animiert.json?__blob=publicationFile&v=2 — 200 — 0 B — 90 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/r/r1625/ReadSpeaker.Styles-Button.css?v=3.5.0.1625www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/libs/ReadSpeaker/r/r1625/ReadSpeaker.Styles-Button.css?v=3.5.0.1625 — 200 — 38.6 KiB — 58 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Modules/CookieBanner/DE/CookieBannerJson.html?view=json&nn=907934www.bmftr.bund.de/SiteGlobals/Modul... https://www.bmftr.bund.de/SiteGlobals/Modules/CookieBanner/DE/CookieBannerJson.html?view=json&nn=907934 — 200 — 4.5 KiB — 45 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/bundle_slideshow.js?v=6www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/JavaScript/init/bundle_slideshow.js?v=6 — 200 — 25.3 KiB — 43 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/favicon.ico?__blob=normal&v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/favicon.ico?__blob=normal&v=4 — 200 — 4.6 KiB — 40 ms — http/1.1https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/favicon/favicon-32x32.png?__blob=normal&v=4www.bmftr.bund.de/SiteGlobals/Front... https://www.bmftr.bund.de/SiteGlobals/Frontend/Images/icons/favicon/favicon-32x32.png?__blob=normal&v=4 — 200 — 4.7 KiB — 40 ms — http/1.1
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 549ms · 729KB · €8/mo
www.bmftr.bund.de
Other
Costly
Execution 246ms
Transfer 285 KB
Unused 46%
Monthly Cost €3/mo
www.bmftr.bund.de
Other
Optional
Execution 168ms
Transfer 419 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 84ms
Transfer 0 KB
Monthly Cost €1/mo
www.bmftr.bund.de
Other
Optional
Execution 51ms
Transfer 25 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.bmftr.bund.de adds 246ms 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.bmftr.bund.de takes 246ms 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

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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