Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
✓
Cache-Control header is set
Got: no-cache
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-cache
Directive
Value
Meaning
no-cache
—
Cache but always revalidate first
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
✓
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
4 fonts (194 KB)
PASS
4 fonts (194 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
194 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
OpenSans-Regular.0ukipt...woff2swap
Size46 KB
Load time39 ms
Start381 ms
RiskFOUT — text flashes from fallback to web font
Satoshi-Variable.0we6-2...woff2swap
Size42 KB
Load time39 ms
Start381 ms
RiskFOUT — text flashes from fallback to web font
OpenSans-SemiBold.0tzam...woff2swap
Size63 KB
Load time43 ms
Start382 ms
RiskFOUT — text flashes from fallback to web font
Satoshi-VariableItalic....woff2swap
Size43 KB
Load time42 ms
Start382 ms
RiskFOUT — text flashes from fallback to web font
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 Caching
All resources properly cached
PASS
All resources properly cached
Info::
✓
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
✓
No render-blocking resources detected
A+
Resource Hints
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
✓
Page uses 2 resource hint(s)
Current Resource Hints
preconnect
1
preload
1
dns-prefetch—
prefetch—
2 resource hints configured
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
✓
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
54 requests over 1123ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100%of JavaScript execution is third-party
First-party Third-party1746ms · 516KB · €19/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.uni-frankfurt.de
www.uni-frankfurt.de
Other
595ms
71 KB
32%
€6/mo
Costly
www.uni-frankfurt.de
www.uni-frankfurt.de
Other
392ms
1 KB
—
€4/mo
Costly
www.uni-frankfurt.de
www.uni-frankfurt.de
Other
366ms
378 KB
70%
€4/mo
Costly
Unattributable
Unattributable
Other
251ms
0 KB
—
€3/mo
Costly
www.uni-frankfurt.de
www.uni-frankfurt.de
Other
142ms
67 KB
31%
€2/mo
Optional
www.uni-frankfurt.de
Other
Costly
Execution595ms
Transfer71 KB
Unused32%
Monthly Cost€6/mo
www.uni-frankfurt.de
Other
Costly
Execution392ms
Transfer1 KB
Monthly Cost€4/mo
www.uni-frankfurt.de
Other
Costly
Execution366ms
Transfer378 KB
Unused70%
Monthly Cost€4/mo
Unattributable
Other
Costly
Execution251ms
Transfer0 KB
Monthly Cost€3/mo
www.uni-frankfurt.de
Other
Optional
Execution142ms
Transfer67 KB
Unused31%
Monthly Cost€2/mo
These scripts may cost more than they're worth
www.uni-frankfurt.de adds 595ms and costs ~€6/month
www.uni-frankfurt.de adds 392ms and costs ~€4/month
www.uni-frankfurt.de adds 366ms and costs ~€4/month
Unattributable adds 251ms and costs ~€3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
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-frankfurt.de takes 595ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.uni-frankfurt.de takes 392ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.uni-frankfurt.de takes 366ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
70% of www.uni-frankfurt.de's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Unattributable takes 251ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
375 ms
750 ms
1.1 s