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.
1.14 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.96 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.162
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.18 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.
1.97 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction80 resources · 1.9 MB · 214 KB savings availableFIX
~213.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 80 resources | 1.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.9 MB transferred, 80 requestsREVIEW
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
BImage Optimization8 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
CJS Execution CostAction1193ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 373ms | 132ms | 0ms | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/794-3bbf792b9526214d.js | 274ms | 221ms | 6ms | 3rd |
| https://www.arbeitsagentur.de/ | 274ms | 10ms | 11ms | 3rd |
| https://web.arbeitsagentur.de/headerfooter/hf-v7/releases/bahf-webcomponents/p-1bc15a26.js | 163ms | 131ms | 0ms | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/4bd1b696-215e5051988c3dde.js | 110ms | 64ms | 4ms | 3rd |
CJS BundlesAction53 scripts, 214 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.arbeitsagentur.de/assets/dpl/js/core.js | 49 KB | 40 KB (83%) | ✓ | 3rd |
| https://web.arbeitsagentur.de/analytics/matomo/tracker/js/container_TTB6sXlA.js | 95 KB | 37 KB (39%) | ✓ | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/2602cb27.000422fbb0f89dd3.js | 34 KB | 32 KB (94%) | ✓ | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/490-b038fd2a7947dcfe.js | 33 KB | 29 KB (88%) | ✓ | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/794-3bbf792b9526214d.js | 59 KB | 28 KB (47%) | ✓ | 3rd |
| https://www.arbeitsagentur.de/oiambk/oiam-oauth-wc/v1/p-CqMppf7A.js | 35 KB | 25 KB (73%) | ✓ | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/4bd1b696-215e5051988c3dde.js | 61 KB | 23 KB (38%) | ✓ | 3rd |
| https://web.arbeitsagentur.de/headerfooter/hf-v7/releases/bahf-webcomponents/p-e1255160.js | 0 KB | — | ✓ | 3rd |
| https://web.arbeitsagentur.de/headerfooter/hf-v7/releases/bahf-webcomponents/p-ffaa3173.entry.js | 18 KB | — | ✓ | 3rd |
| https://www.arbeitsagentur.de/_next/static/chunks/app/error-e3c5aa079c33a4a3.js | 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
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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (141 KB)PASS
Web fonts
5
141 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: noris network AG
Network Waterfall80 requests over 4457msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 373ms | 0 KB | — | €4/mo | Costly |
www.arbeitsagentur.de www.arbeitsagentur.de | Other | 274ms | 59 KB | 47% | €3/mo | Costly |
www.arbeitsagentur.de www.arbeitsagentur.de | Other | 274ms | 30 KB | — | €3/mo | Costly |
web.arbeitsagentur.de web.arbeitsagentur.de | Other | 163ms | 9 KB | — | €2/mo | Optional |
www.arbeitsagentur.de www.arbeitsagentur.de | Other | 110ms | 61 KB | 38% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 373ms and costs ~€4/month
- www.arbeitsagentur.de adds 274ms and costs ~€3/month
- www.arbeitsagentur.de adds 274ms 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
Unattributable takes 373ms 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
www.arbeitsagentur.de takes 274ms 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
www.arbeitsagentur.de takes 274ms 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