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https://antichi.it

Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
4
PASS
13
INFO
4

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

Mobile Desktop
100
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.

617 ms

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

689 ms

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

0 ms

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

0.010

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

617 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

689 ms

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
23
13 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 (271.6 KiB of 271.8 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
272 KB transferred, 14 requests
PASS
272 KB transferred, 14 requests
Info::
Page weighs 295 KB (272 KB transferred)
Info::
14 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
272 KB / 2.4 MB budget
272 KB transferred
14 requests
0.06 g CO2 per page load
Images 132.8 KiB 49%
Fonts 124.4 KiB 46%
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
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 133 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
75ms total JS execution
PASS
75ms total JS execution
Info::
https://www.antichi.it/: 75ms CPU time
Warning::
Third-party scripts: 75ms (100% of total)

Main Thread Breakdown

Style & Layout 56% Other 29% Rendering 8% Script Evaluation 4%
ScriptTotalScriptingParse/CompileParty
https://www.antichi.it/75ms2ms0ms3rd
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 FCP 617 ms LCP 689 mshttps://www.antichi.it/assets/fonts/playfair-display-normal.woff2playfair-display-normal... https://www.antichi.it/assets/fonts/playfair-display-normal.woff2 — 38.2 KiB — 81 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 — 151 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 — 117 ms — font-display: swap
playfair-display-normal... woff2 swap
Size 38 KB
Load time 81 ms
Start 172 ms
Risk FOUT — text flashes from fallback to web font
open-sans-normal.woff2 woff2 swap
Size 48 KB
Load time 151 ms
Start 305 ms
Risk FOUT — text flashes from fallback to web font
playfair-display-italic... woff2 swap
Size 38 KB
Load time 117 ms
Start 305 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
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::
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
14 resources · 272 KB · 0 KB savings available
PASS
14 resources · 272 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 272 KB
Warning::
13 third-party resources (100% of weight)
14 resources · 271.8 KiB · 13 third-party Within 1MB page-weight target
Image 49% · 133.7 KiB
Font 46% · 124.4 KiB
Document 3% · 8.2 KiB
JavaScript 1% · 2.9 KiB
CSS 1% · 2.6 KiB
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
14 requests over 540ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 617 ms LCP 689 mshttps://antichi.it// https://antichi.it/ — 301 — 203 B — 114 ms — h2https://www.antichi.it/www.antichi.it/ https://www.antichi.it/ — 200 — 8.0 KiB — 49 ms — h2https://www.antichi.it/assets/fonts.csswww.antichi.it/assets/fonts.css https://www.antichi.it/assets/fonts.css — 200 — 968 B — 47 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 — 81 ms — h2https://www.antichi.it/assets/site.csswww.antichi.it/assets/site.css https://www.antichi.it/assets/site.css — 200 — 1.6 KiB — 82 ms — h2https://www.antichi.it/assets/site.jswww.antichi.it/assets/site.js https://www.antichi.it/assets/site.js — 200 — 2.9 KiB — 78 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 — 151 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 — 117 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 — 145 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 — 147 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 — 147 ms — h3https://www.antichi.it/immagini/IFbAIk8fKNs.webpwww.antichi.it/immagini/IFbAIk8fKNs... https://www.antichi.it/immagini/IFbAIk8fKNs.webp — 200 — 20.1 KiB — 178 ms — h3https://www.antichi.it/immagini/6-lVf6Fmxrg.webpwww.antichi.it/immagini/6-lVf6Fmxrg... https://www.antichi.it/immagini/6-lVf6Fmxrg.webp — 200 — 19.4 KiB — 178 ms — h3https://www.antichi.it/favicon.svgwww.antichi.it/favicon.svg https://www.antichi.it/favicon.svg — 200 — 851 B — 44 ms — h3
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-party 75ms · 8KB · €1/mo
www.antichi.it
Other
Optional
Execution 75ms
Transfer 8 KB
Monthly Cost €1/mo

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

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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