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.
C
Asset Compression
Action
1 of 4 asset hosts serve text uncompressed
REVIEW
1 of 4 asset hosts serve text uncompressed
Info::
i
www.fabioantichi.it serves assets with gzip; brotli would be ~20% smaller (assets: 70)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
Got: www.fabioantichi.it (text/css)
Warning::
!
fonts.googleapis.com serves text assets uncompressed (assets: 6)
The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.
Got: fonts.googleapis.com (text/css)
Info::
✓
s.w.org serves assets with brotli (assets: 6)
Got: s.w.org (image/svg+xml)
Info::
✓
www.googletagmanager.com serves assets with brotli (assets: 3)
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.
B
JavaScript Blocking
1 JS blocking issue(s) detected
REVIEW
1 JS blocking issue(s) detected
Warning::
!
15 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
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 (146 KB)
PASS
3 fonts (146 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
146 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
UcC73FwrK3iLTeHuS_nVMrM...woff2swap
Size47 KB
Load time84 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
92zatBhPNqw73oTd4jQmfxI...woff2swap
Size26 KB
Load time72 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
Wnz6HAc5bAfYB2Q7ZjYYiAz...woff2swap
Size73 KB
Load time92 ms
Start1.4 s
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
✓
Page uses 3 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
3
prefetch—
3 resource hints configured
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.
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Aruba.it
Network Waterfall
64 requests over 2106ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
84%of JavaScript execution is third-party
First-party Third-party1299ms · 659KB · €7/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.fabioantichi.it
www.fabioantichi.it
Other
500ms
13 KB
—
€3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
342ms
182 KB
32%
€2/mo
Costly
Iubenda
cdn.iubenda.com
Consent
194ms
113 KB
50%
€1/mo
Essential
Google Tag Manager
www.googletagmanager.com
Tag Manager
120ms
132 KB
56%
€1/mo
Optional
www.fabioantichi.it
www.fabioantichi.it
Other
83ms
86 KB
59%
€0/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
60ms
132 KB
76%
€0/mo
Optional
www.fabioantichi.it
Other
Costly
Execution500ms
Transfer13 KB
Monthly Cost€3/mo
Google Tag Manager
Tag Manager
Costly
Execution342ms
Transfer182 KB
Unused32%
Monthly Cost€2/mo
Iubenda
Consent
Essential
Execution194ms
Transfer113 KB
Unused50%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution120ms
Transfer132 KB
Unused56%
Monthly Cost€1/mo
www.fabioantichi.it
Other
Optional
Execution83ms
Transfer86 KB
Unused59%
Monthly Cost€0/mo
Google Tag Manager
Tag Manager
Optional
Execution60ms
Transfer132 KB
Unused76%
Monthly Cost€0/mo
These scripts may cost more than they're worth
www.fabioantichi.it adds 500ms and costs ~€3/month
Google Tag Manager adds 342ms and costs ~€2/month
84% 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.fabioantichi.it takes 500ms 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 342ms 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
50% of Iubenda'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
56% 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.
Source: web.dev
59% of www.fabioantichi.it'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
76% 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.