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.
727 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.60 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
159 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.019
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.90 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.
2.72 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS BundlesAction64 scripts, 438 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.kleinanzeigen.de/liberty/liberty-js-cp/prebid-experimental/prebid.js | 126 KB | 109 KB (86%) | ✓ | 3rd |
| https://server.sgtm-legacy.kleinanzeigen.de/gtag/js?id=G-6V6MWRHVN8&cx=c>m=4e64k0h2&sign=e3095849d0ba8f01e9398700d33e20e2a8ccf09e1726b424e95ce14766bbb8fd_20260421 | 174 KB | 58 KB (34%) | ✓ | 3rd |
| https://server.sgtm-legacy.kleinanzeigen.de/gtm.js?id=GTM-WHRTL83 | 171 KB | 53 KB (31%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/liberty/advertising-web-renderer/umd/advertisingWebRenderer.min.js | 103 KB | 51 KB (50%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/WFxkaIMiXtGDAz_nIdas_5vo/E3c9t0wz6cpXmD/cEMlcQYB/TQAoKi/EIaiAB | 176 KB | 37 KB (21%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/WFxkaIMiXtGDAz_nIdas_5vo/E3c9t0wz6cpXmD/cEMlcQYB/TQAoKi/EIaiAB | 176 KB | 37 KB (21%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/frontend-web/_homepage-web/assets/FeedItemTileNewCard.CcwjUC2R.js | 66 KB | 26 KB (39%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/bffstatic/promotion-frontend/promotion-frontend-bundle.js | 48 KB | 23 KB (49%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/frontend-web/_homepage-web/assets/SearchForm.DVdkA-ry.js | 27 KB | 23 KB (86%) | ✓ | 3rd |
| https://www.kleinanzeigen.de/gdpr/gdpr-consent-management-platform/es/main-BDACvMDz.min.js | 36 KB | 20 KB (56%) | ✗ | 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
FPage Weight InventoryAction160 resources · 1.9 MB · 438 KB savings availableFIX
~438.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 160 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, 160 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
CImage OptimizationAction40 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
CJS Execution CostAction1609ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.kleinanzeigen.de/WFxkaIMiXtGDAz_nIdas_5vo/E3c9t0wz6cpXmD/cEMlcQYB/TQAoKi/EIaiAB | 430ms | 366ms | 24ms | 3rd |
| Unattributable | 341ms | 34ms | 0ms | 3rd |
| https://www.kleinanzeigen.de/kml/js/engine/n1ux7flhug | 304ms | 265ms | 6ms | 3rd |
| https://www.kleinanzeigen.de/ | 185ms | 14ms | 3ms | 3rd |
| https://server.sgtm-legacy.kleinanzeigen.de/gtm.js?id=GTM-WHRTL83 | 95ms | 70ms | 17ms | 3rd |
| https://server.sgtm-legacy.kleinanzeigen.de/gtag/js?id=G-6V6MWRHVN8&cx=c>m=4e64k0h2&sign=e3095849d0ba8f01e9398700d33e20e2a8ccf09e1726b424e95ce14766bbb8fd_20260421 | 73ms | 51ms | 13ms | 3rd |
| https://www.kleinanzeigen.de/frontend-web/_homepage-web/assets/index.DW_9MbtI.js | 73ms | 68ms | 0ms | 3rd |
| https://www.kleinanzeigen.de/liberty/liberty-js-cp/prebid-experimental/prebid.js | 54ms | 42ms | 12ms | 3rd |
| https://www.kleinanzeigen.de/gdpr/gdpr-consent-management-platform/es/main-BDACvMDz.min.js | 54ms | 20ms | 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 LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall160 requests over 6814msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 430ms | 0 KB | 21% | €5/mo | Costly |
Unattributable Unattributable | Other | 341ms | 0 KB | — | €4/mo | Costly |
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 304ms | 67 KB | — | €3/mo | Costly |
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 185ms | 36 KB | — | €2/mo | Optional |
server.sgtm-legacy.kleinanzeigen.de server.sgtm-legacy.kleinanzeigen.de | Other | 95ms | 171 KB | 31% | €1/mo | Optional |
server.sgtm-legacy.kleinanzeigen.de server.sgtm-legacy.kleinanzeigen.de | Other | 73ms | 174 KB | 34% | €1/mo | Optional |
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 73ms | 50 KB | — | €1/mo | Optional |
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 54ms | 126 KB | 86% | €1/mo | Optional |
www.kleinanzeigen.de www.kleinanzeigen.de | Other | 54ms | 36 KB | 56% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.kleinanzeigen.de adds 430ms and costs ~€5/month
- Unattributable adds 341ms and costs ~€4/month
- www.kleinanzeigen.de adds 304ms 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.kleinanzeigen.de takes 430ms 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
Unattributable takes 341ms 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.kleinanzeigen.de takes 304ms 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
86% of www.kleinanzeigen.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
56% of www.kleinanzeigen.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