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.
3.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.41 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
238 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.
5.80 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.
8.61 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
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.4 MB transferred, 55 requestsREVIEW
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
BImage Optimization33 images, 0 KB saveableREVIEW
CJS Execution CostAction1734ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/merged-cbc3b9cee04d0b5ce1db5b83afe78ea0-0d2b905a0f6ee977d2e028a16261b062.js.gzip?1701247136 | 661ms | 408ms | 15ms | 3rd |
| Unattributable | 447ms | 22ms | 0ms | 3rd |
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/merged-75e3a5c0ee6cbe38962798bd61b5ecbe-61f20dbbea208357c59718fd1a8e0346.js.gzip?1701247136 | 294ms | 29ms | 19ms | 3rd |
| https://www.uni-wuerzburg.de/ | 161ms | 24ms | 3ms | 3rd |
| https://webstats.uni-wuerzburg.de/js/container_81AEXS1l.js | 106ms | 75ms | 25ms | 3rd |
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/Form.min-e75beb9dfb706bf6954cd7398e0b3472.js.gzip?1765952950 | 65ms | 39ms | 12ms | 3rd |
CPage Weight InventoryAction55 resources · 1.4 MB · 46 KB savings availableREVIEW
~46.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 55 resources | 1.4 MiB | ||||||
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 (124 KB)PASS
Web fonts
6
124 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
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 ~2 KB and ~4 ms
A+JS Bundles6 scripts, 46 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/merged-75e3a5c0ee6cbe38962798bd61b5ecbe-61f20dbbea208357c59718fd1a8e0346.js.gzip?1701247136 | 40 KB | 25 KB (64%) | ✓ | 3rd |
| https://webstats.uni-wuerzburg.de/matomo.js | 22 KB | 21 KB (98%) | ✓ | 3rd |
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/merged-cbc3b9cee04d0b5ce1db5b83afe78ea0-0d2b905a0f6ee977d2e028a16261b062.js.gzip?1701247136 | 36 KB | — | ✓ | 3rd |
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/merged-9c500688b32a3b38853cebb16a293582-9240603b045a1d8427ab96159a49b5b0.js.gzip?1765952950 | 1 KB | — | ✓ | 3rd |
| https://www.uni-wuerzburg.de/typo3temp/assets/compressed/Form.min-e75beb9dfb706bf6954cd7398e0b3472.js.gzip?1765952950 | 27 KB | — | ✓ | 3rd |
| https://webstats.uni-wuerzburg.de/js/container_81AEXS1l.js | 35 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
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
Network Waterfall55 requests over 1652msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.uni-wuerzburg.de www.uni-wuerzburg.de | Other | 661ms | 36 KB | — | €7/mo | Costly |
Unattributable Unattributable | Other | 447ms | 0 KB | — | €5/mo | Costly |
www.uni-wuerzburg.de www.uni-wuerzburg.de | Other | 294ms | 40 KB | 64% | €3/mo | Costly |
www.uni-wuerzburg.de www.uni-wuerzburg.de | Other | 161ms | 20 KB | — | €2/mo | Optional |
webstats.uni-wuerzburg.de webstats.uni-wuerzburg.de | Other | 106ms | 35 KB | — | €1/mo | Optional |
www.uni-wuerzburg.de www.uni-wuerzburg.de | Other | 65ms | 27 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.uni-wuerzburg.de adds 661ms and costs ~€7/month
- Unattributable adds 447ms and costs ~€5/month
- www.uni-wuerzburg.de adds 294ms 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.uni-wuerzburg.de takes 661ms 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 447ms 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.uni-wuerzburg.de takes 294ms 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
64% of www.uni-wuerzburg.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