Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Warning::
!
https://pixel-p2.s3.eu-central-1.amazonaws.com/doc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://s3-eu-west-1.amazonaws.com/miodottore.it/d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://platform.docplanner.com/img/general/homepa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://platform.docplanner.com/img/it/homepage/ba... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://pixel-p2.s3.eu-central-1.amazonaws.com/doc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://s3-eu-west-1.amazonaws.com/miodottore.it/d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://platform.docplanner.com/img/general/doctor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
15images296 KB
0oversized-0 KB
12legacy format
8missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
Performance issues directly impact user engagement and conversion rates.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
i
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
✓
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
i
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
Network Waterfall
97 requests over 4318ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
91%of JavaScript execution is third-party
First-party Third-party1835ms · 1739KB · €29/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Google Tag Manager
www.googletagmanager.com
Tag Manager
569ms
199 KB
29%
€9/mo
Costly
www.miodottore.it
www.miodottore.it
Other
295ms
218 KB
—
€5/mo
Costly
platform.docplanner.com
platform.docplanner.com
Other
174ms
266 KB
69%
€3/mo
Optional
dev.visualwebsiteoptimizer.com
dev.visualwebsiteoptimizer.com
Other
163ms
99 KB
65%
€3/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
157ms
174 KB
33%
€3/mo
Optional
platform.docplanner.com
platform.docplanner.com
Other
99ms
4 KB
—
€2/mo
Optional
cookie-cdn.cookiepro.com
cookie-cdn.cookiepro.com
Other
97ms
135 KB
54%
€2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
81ms
139 KB
46%
€1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
81ms
149 KB
44%
€1/mo
Optional
platform.docplanner.com
platform.docplanner.com
Other
65ms
339 KB
97%
€1/mo
Optional
platform.docplanner.com
platform.docplanner.com
Other
54ms
17 KB
—
€1/mo
Optional
Google Tag Manager
Tag Manager
Costly
Execution569ms
Transfer199 KB
Unused29%
Monthly Cost€9/mo
www.miodottore.it
Other
Costly
Execution295ms
Transfer218 KB
Monthly Cost€5/mo
platform.docplanner.com
Other
Optional
Execution174ms
Transfer266 KB
Unused69%
Monthly Cost€3/mo
dev.visualwebsiteoptimizer.com
Other
Optional
Execution163ms
Transfer99 KB
Unused65%
Monthly Cost€3/mo
Google Tag Manager
Tag Manager
Optional
Execution157ms
Transfer174 KB
Unused33%
Monthly Cost€3/mo
platform.docplanner.com
Other
Optional
Execution99ms
Transfer4 KB
Monthly Cost€2/mo
cookie-cdn.cookiepro.com
Other
Optional
Execution97ms
Transfer135 KB
Unused54%
Monthly Cost€2/mo
Google Tag Manager
Tag Manager
Optional
Execution81ms
Transfer139 KB
Unused46%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution81ms
Transfer149 KB
Unused44%
Monthly Cost€1/mo
platform.docplanner.com
Other
Optional
Execution65ms
Transfer339 KB
Unused97%
Monthly Cost€1/mo
platform.docplanner.com
Other
Optional
Execution54ms
Transfer17 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
Google Tag Manager adds 569ms and costs ~€9/month
www.miodottore.it adds 295ms and costs ~€5/month
91% 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
Google Tag Manager takes 569ms 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.miodottore.it takes 295ms 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
69% of platform.docplanner.com'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
65% of dev.visualwebsiteoptimizer.com'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
54% of cookie-cdn.cookiepro.com'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
97% of platform.docplanner.com'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.