Performance
· 17 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.
3.27 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.58 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
8.73 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.076
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.32 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.
19.46 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction21111ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.wiwo.de/beta-frontend/polyfills.1cfcd735136e8afb.js | 10649ms | 8113ms | 0ms | 3rd |
| https://www.wiwo.de/beta-frontend/main.4f75d5b24f89a76a.js | 3202ms | 3075ms | 13ms | 3rd |
| https://www.wiwo.de/ | 2352ms | 27ms | 2ms | 3rd |
| https://www.wiwo.de/beta-frontend/runtime.e35ba41799fec5e7.js | 2337ms | 2207ms | 0ms | 3rd |
| Unattributable | 1200ms | 52ms | 0ms | 3rd |
| https://cmp-sp.wiwo.de/Notice.8f529.js | 653ms | 501ms | 46ms | 3rd |
| https://cmp-sp.wiwo.de/unified/wrapperMessagingWithoutDetection.js | 231ms | 204ms | 19ms | 3rd |
| https://assets.www.wiwo.de/frontend/7984.bb7db9a9045621de.js | 167ms | 128ms | 1ms | 3rd |
| https://cmp-sp.wiwo.de/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js | 130ms | 108ms | 21ms | 3rd |
| https://assets.www.wiwo.de/frontend/3804.c4b5bd4ad6a573c1.js | 126ms | 95ms | 1ms | 3rd |
Showing top 10 of 11 scripts
DPage Weight InventoryAction120 resources · 1.8 MB · 161 KB savings availableFIX
~161.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 120 resources | 1.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.8 MB transferred, 120 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
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
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
CJS BundlesAction85 scripts, 161 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.wiwo.de/beta-frontend/main.4f75d5b24f89a76a.js | 176 KB | 74 KB (42%) | ✓ | 3rd |
| https://cmp-sp.wiwo.de/Notice.8f529.js | 91 KB | 62 KB (69%) | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/3804.c4b5bd4ad6a573c1.js | 45 KB | 25 KB (56%) | ✓ | 3rd |
| https://www.wiwo.de/beta-frontend/runtime.e35ba41799fec5e7.js | 5 KB | — | ✓ | 3rd |
| https://www.wiwo.de/beta-frontend/polyfills.1cfcd735136e8afb.js | 12 KB | — | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/2175.4828dd46932ae3cf.js | 61 KB | — | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/8993.84938c0fbcebc2ff.js | 4 KB | — | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/2329.10ec88be4387194e.js | 5 KB | — | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/6043.fa1919fb1d7c1ee3.js | 4 KB | — | ✓ | 3rd |
| https://assets.www.wiwo.de/frontend/8477.967442a18e935673.js | 4 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
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization9 images, 0 KB saveablePASS
A+Font Loading9 fonts (307 KB)PASS
Web fonts
9
307 KB total
Render-blocking
0
of 9
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+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall120 requests over 7048msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.wiwo.de www.wiwo.de | Other | 10649ms | 12 KB | — | €116/mo | Costly |
www.wiwo.de www.wiwo.de | Other | 3202ms | 176 KB | 42% | €35/mo | Costly |
www.wiwo.de www.wiwo.de | Other | 2352ms | 94 KB | — | €26/mo | Costly |
www.wiwo.de www.wiwo.de | Other | 2337ms | 5 KB | — | €25/mo | Costly |
Unattributable Unattributable | Other | 1200ms | 0 KB | — | €13/mo | Costly |
cmp-sp.wiwo.de cmp-sp.wiwo.de | Other | 653ms | 91 KB | 69% | €7/mo | Costly |
cmp-sp.wiwo.de cmp-sp.wiwo.de | Other | 231ms | 40 KB | — | €3/mo | Costly |
assets.www.wiwo.de assets.www.wiwo.de | Other | 167ms | 16 KB | — | €2/mo | Optional |
cmp-sp.wiwo.de cmp-sp.wiwo.de | Other | 130ms | 29 KB | — | €1/mo | Optional |
assets.www.wiwo.de assets.www.wiwo.de | Other | 126ms | 45 KB | 56% | €1/mo | Optional |
www.wiwo.de www.wiwo.de | Other | 64ms | 75 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.wiwo.de adds 10649ms and costs ~€116/month
- www.wiwo.de adds 3202ms and costs ~€35/month
- www.wiwo.de adds 2352ms and costs ~€26/month
- www.wiwo.de adds 2337ms and costs ~€25/month
- Unattributable adds 1200ms and costs ~€13/month
- cmp-sp.wiwo.de adds 653ms and costs ~€7/month
- cmp-sp.wiwo.de adds 231ms 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.wiwo.de takes 10649ms 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.wiwo.de takes 3202ms 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.wiwo.de takes 2352ms 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.wiwo.de takes 2337ms 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 1200ms 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
cmp-sp.wiwo.de takes 653ms 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
69% of cmp-sp.wiwo.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
cmp-sp.wiwo.de takes 231ms 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
56% of assets.www.wiwo.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