Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
B
HTTP Caching
no-cache, must-revalidate, max-age=0
REVIEW
no-cache, must-revalidate, max-age=0
Info::
✓
Cache-Control header is set
Got: no-cache, must-revalidate, max-age=0
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-cache, must-revalidate, max-age=0
Directive
Value
Meaning
no-cache
—
Cache but always revalidate first
must-revalidate
—
Must recheck with server after expiry
max-age
0
Cache for 0 seconds
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
3 fonts (34 KB)
PASS
3 fonts (34 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
34 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
sentasans_bold.woffwoffswap
Size13 KB
Load time473 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Brooklyn-Bold.woffwoffswap
Size10 KB
Load time473 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Brooklyn-Normal.woffwoffswap
Size10 KB
Load time473 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
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 ~10 KB and ~20 ms
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
2
preload—
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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
66 requests over 4734ms
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-party2511ms · 572KB · €27/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.lapietra.edu
www.lapietra.edu
Other
810ms
8 KB
—
€9/mo
Costly
Unattributable
Unattributable
Other
487ms
0 KB
—
€5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
487ms
177 KB
39%
€5/mo
Costly
www.lapietra.edu
www.lapietra.edu
Other
453ms
113 KB
70%
€5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
164ms
148 KB
43%
€2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
110ms
126 KB
53%
€1/mo
Optional
www.lapietra.edu
Other
Costly
Execution810ms
Transfer8 KB
Monthly Cost€9/mo
Unattributable
Other
Costly
Execution487ms
Transfer0 KB
Monthly Cost€5/mo
Google Tag Manager
Tag Manager
Costly
Execution487ms
Transfer177 KB
Unused39%
Monthly Cost€5/mo
www.lapietra.edu
Other
Costly
Execution453ms
Transfer113 KB
Unused70%
Monthly Cost€5/mo
Google Tag Manager
Tag Manager
Optional
Execution164ms
Transfer148 KB
Unused43%
Monthly Cost€2/mo
Google Tag Manager
Tag Manager
Optional
Execution110ms
Transfer126 KB
Unused53%
Monthly Cost€1/mo
These scripts may cost more than they're worth
www.lapietra.edu adds 810ms and costs ~€9/month
Unattributable adds 487ms and costs ~€5/month
Google Tag Manager adds 487ms and costs ~€5/month
www.lapietra.edu adds 453ms and costs ~€5/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.lapietra.edu takes 810ms 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
Unattributable takes 487ms 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
Google Tag Manager takes 487ms 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.lapietra.edu takes 453ms 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.lapietra.edu'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
53% of Google Tag Manager'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.