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https://antichi.it

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
4
PASS
17
INFO
4

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.36 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.51 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

55 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.016

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.82 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.

2.51 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 s
Checks
27
17 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (232.1 KiB of 232.3 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
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
Document Compression
Action
Document response served uncompressed
REVIEW
Document response served uncompressed
Info::
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::
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::
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+
Page Weight Budget
232 KB transferred, 12 requests
PASS
232 KB transferred, 12 requests
Info::
Page weighs 257 KB (232 KB transferred)
Info::
12 HTTP requests
Info::
Estimated 0.05 g CO2 per page load
232 KB / 2.4 MB budget
232 KB transferred
12 requests
0.05 g CO2 per page load
Fonts 124.4 KiB 54%
Images 93.3 KiB 40%
HTML 8.0 KiB 3%
JavaScript 2.9 KiB 1%
CSS 2.6 KiB 1%
Other 1.0 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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+
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 93 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
474ms total JS execution
PASS
474ms total JS execution
Warning::
https://www.antichi.it/: 355ms CPU time
Info::
Unattributable: 119ms CPU time
Warning::
Third-party scripts: 355ms (75% of total)

Main Thread Breakdown

Style & Layout 61% Other 27% Rendering 6% Script Evaluation 3%
ScriptTotalScriptingParse/CompileParty
https://www.antichi.it/355ms6ms1ms3rd
Unattributable119ms5ms0ms1st
A+
Font Loading
3 fonts (124 KB)
PASS
3 fonts (124 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

124 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.4 s LCP 2.5 shttps://www.antichi.it/assets/fonts/playfair-display-normal.woff2playfair-display-normal... https://www.antichi.it/assets/fonts/playfair-display-normal.woff2 — 38.2 KiB — 84 ms — font-display: swaphttps://www.antichi.it/assets/fonts/open-sans-normal.woff2open-sans-normal.woff2 https://www.antichi.it/assets/fonts/open-sans-normal.woff2 — 47.8 KiB — 118 ms — font-display: swaphttps://www.antichi.it/assets/fonts/playfair-display-italic.woff2playfair-display-italic... https://www.antichi.it/assets/fonts/playfair-display-italic.woff2 — 38.5 KiB — 144 ms — font-display: swap
playfair-display-normal... woff2 swap
Size 38 KB
Load time 84 ms
Start 181 ms
Risk FOUT — text flashes from fallback to web font
open-sans-normal.woff2 woff2 swap
Size 48 KB
Load time 118 ms
Start 285 ms
Risk FOUT — text flashes from fallback to web font
playfair-display-italic... woff2 swap
Size 38 KB
Load time 144 ms
Start 285 ms
Risk FOUT — 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+
JS Bundles
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.antichi.it/assets/site.js3 KB—✓3rd
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 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::
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.
A
Page Weight Inventory
12 resources · 232 KB · 0 KB savings available
PASS
12 resources · 232 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 232 KB
Warning::
11 third-party resources (100% of weight)
12 resources · 232.3 KiB · 11 third-party Within 1MB page-weight target
Font 54% · 124.4 KiB
Image 41% · 94.2 KiB
Document 4% · 8.2 KiB
JavaScript 1% · 2.9 KiB
CSS 1% · 2.6 KiB
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+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
12 requests over 516ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.4 s LCP 2.5 shttps://antichi.it// https://antichi.it/ — 301 — 203 B — 117 ms — h2https://www.antichi.it/www.antichi.it/ https://www.antichi.it/ — 200 — 8.0 KiB — 50 ms — h2https://www.antichi.it/assets/fonts.csswww.antichi.it/assets/fonts.css https://www.antichi.it/assets/fonts.css — 200 — 968 B — 50 ms — h2https://www.antichi.it/assets/fonts/playfair-display-normal.woff2www.antichi.it/assets/fonts/playfai... https://www.antichi.it/assets/fonts/playfair-display-normal.woff2 — 200 — 38.2 KiB — 84 ms — h2https://www.antichi.it/assets/site.csswww.antichi.it/assets/site.css https://www.antichi.it/assets/site.css — 200 — 1.6 KiB — 49 ms — h2https://www.antichi.it/assets/site.jswww.antichi.it/assets/site.js https://www.antichi.it/assets/site.js — 200 — 2.9 KiB — 46 ms — h2https://www.antichi.it/assets/fonts/open-sans-normal.woff2www.antichi.it/assets/fonts/open-sa... https://www.antichi.it/assets/fonts/open-sans-normal.woff2 — 200 — 47.8 KiB — 118 ms — h3https://www.antichi.it/assets/fonts/playfair-display-italic.woff2www.antichi.it/assets/fonts/playfai... https://www.antichi.it/assets/fonts/playfair-display-italic.woff2 — 200 — 38.5 KiB — 144 ms — h3https://www.antichi.it/immagini/francesca-antichi.webpwww.antichi.it/immagini/francesca-a... https://www.antichi.it/immagini/francesca-antichi.webp — 200 — 16.6 KiB — 126 ms — h3https://www.antichi.it/immagini/fabio-antichi.webpwww.antichi.it/immagini/fabio-antic... https://www.antichi.it/immagini/fabio-antichi.webp — 200 — 25.2 KiB — 127 ms — h3https://www.antichi.it/immagini/gianfranco-antichi.webpwww.antichi.it/immagini/gianfranco-... https://www.antichi.it/immagini/gianfranco-antichi.webp — 200 — 51.5 KiB — 153 ms — h3https://www.antichi.it/favicon.svgwww.antichi.it/favicon.svg https://www.antichi.it/favicon.svg — 200 — 851 B — 49 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
75% of JavaScript execution is third-party
First-party Third-party 355ms · 8KB · €4/mo
www.antichi.it
Other
Costly
Execution 355ms
Transfer 8 KB
Monthly Cost €4/mo

These scripts may cost more than they're worth

  • www.antichi.it adds 355ms and costs ~€4/month

75% 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.antichi.it takes 355ms 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

How third-party costs are calculated

Image Optimization
8 images, 65 KB total, 15 KB wasted
INFO

Image Optimization Audit

Total Images

8

Total Size

65 KB

Oversized

1

Wasted

15 KB

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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