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.
875 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.58 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
10 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.66 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.
1.59 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 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction33 resources · 1.5 MB · 159 KB savings availableFIX
~158.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 33 resources | 1.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.5 MB transferred, 33 requestsREVIEW
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
CJS BundlesAction10 scripts, 159 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cms-cdn.lmu.de/assets/scripts/app.bundle.js | 60 KB | 44 KB (73%) | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/scripts/bundle.vue_3.js | 58 KB | 38 KB (66%) | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/vuejs/v3_3_4_vue_min.js | 49 KB | 33 KB (69%) | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/scripts/vendors-app.bundle.js | 38 KB | 24 KB (62%) | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/scripts/jquery-3.5.1.min.js | 31 KB | 20 KB (67%) | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/vuejs/v4_0_2_vuex.min.js | 5 KB | — | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/vuejs/v4_2_6_es6-promise_auto.min.js | 3 KB | — | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/vuejs/v0_18_0_axios.min.js | 5 KB | — | ✓ | 3rd |
| https://cms-cdn.lmu.de/assets/scripts/runtime.bundle.js | 1 KB | — | ✓ | 3rd |
| https://web-analytics.lmu.de/matomo.js | 25 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost251ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 97ms | 4ms | 0ms | 3rd |
| https://www.lmu.de/de/index.html | 87ms | 18ms | 1ms | 3rd |
| https://cms-cdn.lmu.de/assets/scripts/app.bundle.js | 67ms | 50ms | 12ms | 3rd |
A+Font Loading5 fonts (143 KB)PASS
Web fonts
5
143 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
Network Waterfall33 requests over 3656msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 97ms | 0 KB | — | €1/mo | Optional |
www.lmu.de www.lmu.de | Other | 87ms | 8 KB | — | €1/mo | Optional |
cms-cdn.lmu.de cms-cdn.lmu.de | Other | 67ms | 60 KB | 73% | €1/mo | Optional |
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
73% of cms-cdn.lmu.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