Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
10.51 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.53 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
13 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.090
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
20.81 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.
11.83 s
Page Load Progression
FPage Weight BudgetAction3.3 MB transferred, 28 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS BundlesAction6 scripts, 323 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.bundeswirtschaftsministerium.de/cae/frontend/BMWi/js/production.min.js?release=2025-09 | 262 KB | 176 KB (67%) | ✓ | 3rd |
| https://dashboard.stage.bio/static/bundle.js | 159 KB | 99 KB (62%) | ✓ | 3rd |
| https://www.bundeswirtschaftsministerium.de/cae/frontend/static/jwplayer-7.6.1/jwplayer.js | 59 KB | 49 KB (83%) | ✓ | 3rd |
| https://code.etracker.com/code/e.js | 31 KB | — | ✓ | 3rd |
| https://code.etracker.com/t.js?v=ee485f6&et=13bXdV | 7 KB | — | ✓ | 3rd |
| https://www.etracker.de/cntcc?&&et=13bXdV&v=6.0&tc=17769020973624&pagename=__INDEX__DE%252FHome%252Fhome&ilevel=1&areas=%252FNavigation%252FDE%252FHome%252F&et_source_url=https%3A%2F%2Fwww.bundeswirtschaftsministerium.de%2FNavigation%2FDE%2FHome%2Fhome.html&cc_ordercurr=EUR&cc_ordertype=lead&cc_baskettype=basket&block_cookies=true&respect_dnt=true&et_bs=1&code_source=%2F%2Fcode.etracker.com%2Fcode%2Fe.js&code_async=true&page_id=902097151&et_sbscr=0&coid=15c104f6fdf28c94798647641a25a8c2&et_cblk=1&et_cd=www.bundeswirtschaftsministerium.de&dh=X2XjaVP5%2Br%2FWWwmRp45%2Fuysf26mm6MwG&clt=24 | 0 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
DPage Weight InventoryAction28 resources · 3.3 MB · 323 KB savings availableFIX
~323.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 28 resources | 3.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction11 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost628ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.bundeswirtschaftsministerium.de/cae/frontend/BMWi/js/production.min.js?release=2025-09 | 267ms | 113ms | 16ms | 3rd |
| https://www.bundeswirtschaftsministerium.de/Navigation/DE/Home/home.html | 258ms | 1ms | 0ms | 3rd |
| Unattributable | 104ms | 1ms | 0ms | 3rd |
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (423 KB)PASS
Web fonts
6
423 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~127 KB and ~254 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall28 requests over 38915msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.bundeswirtschaftsministerium.de www.bundeswirtschaftsministerium.de | Other | 267ms | 262 KB | 67% | €3/mo | Costly |
www.bundeswirtschaftsministerium.de www.bundeswirtschaftsministerium.de | Other | 258ms | 194 KB | — | €3/mo | Costly |
Unattributable Unattributable | Other | 104ms | 0 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.bundeswirtschaftsministerium.de adds 267ms and costs ~€3/month
- www.bundeswirtschaftsministerium.de adds 258ms and costs ~€3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.bundeswirtschaftsministerium.de takes 267ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
67% of www.bundeswirtschaftsministerium.de's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.bundeswirtschaftsministerium.de takes 258ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev