Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

100

Best Practices

100

SEO

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

288 ms

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

612 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.

1.311

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

350 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.

612 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

16 PASS 3 REVIEW

Main HTML Cache-Control

Action

Main HTML max-age=14400 (~240min) is aggressive

REVIEW

Main HTML max-age=14400 (~240min) is aggressive

Main HTML cached for 240 minutes -- risks stale auth / SPA state

Long max-age on the main HTML document means users may see outdated auth state, SPA shells, or A/B variants until the cache expires. Consider Cache-Control: no-cache (or max-age=300) for HTML and let your hashed assets (JS/CSS/images) carry the long cache instead.

Got: max-age=14400

Server-Timing Observability

No Server-Timing header found

REVIEW

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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

250 KB transferred, 12 requests

PASS

250 KB transferred, 12 requests

Page weighs 1.0 MB (250 KB transferred)

12 HTTP requests

Estimated 0.05 g CO2 per page load

250 KB transferred

12 requests

0.05 g CO2 per page load

CSS 125.7 KiB 50%

Images 33.6 KiB 13%

Fonts 32.4 KiB 13%

HTML 30.3 KiB 12%

JavaScript 25.2 KiB 10%

Other 1.5 KiB 1%

Other 1.0 KiB 0%

Other 454 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-party.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

2 images, 0 KB saveable

PASS

2 images, 0 KB saveable

All images are well-optimized

2 images 34 KB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

294ms total JS execution

PASS

294ms total JS execution

https://tuttopaesi.it/: 294ms CPU time

Main Thread Breakdown

Style & Layout 47% Other 38% Rendering 6% Script Evaluation 4% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://tuttopaesi.it/	294ms	3ms	1ms	1st

A+

Font Loading

1 fonts (32 KB)

PASS

1 fonts (32 KB)

1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

32 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

outfit-latin.woff2 woff2 swap

Size 32 KB

Load time 34 ms

Start 76 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

2 scripts, 0 KB unused

PASS

2 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://tuttopaesi.it/js/cookie-consent.js	3 KB	—	✓	1st
https://tuttopaesi.it/js/app.js	22 KB	—	✓	1st

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

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+

Document Compression

Document response uses brotli

PASS

Document response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Accept-Encoding

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

A+

Page Weight Inventory

12 resources · 250 KB · 0 KB savings available

PASS

12 resources · 250 KB · 0 KB savings available

Within 1MB page-weight target

Got: 250 KB

12 resources · 250.2 KiB · 0 third-party Within 1MB page-weight target

CSS 50% · 125.7 KiB

Image 14% · 35.1 KiB

Font 13% · 32.4 KiB

Document 12% · 30.3 KiB

JavaScript 10% · 25.2 KiB

Other 1% · 1.5 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

12 resources			250.2 KiB

A+

HTTP Caching

max-age=14400 (4 hours)

PASS

max-age=14400 (4 hours)

Cache-Control header is set

Got: max-age=14400

Effective TTL: 4 hours (max-age=14400)

Last-Modified header present

Cache-Control

max-age=14400

Directive	Value	Meaning
max-age	14400	Cache for 4 hours

Effective TTL: 14400 seconds

Asset Compression

No text asset hosts to measure

INFO

No text asset hosts to measure

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 395ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

2 images, 32 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

32 KB

1 missing dimensions

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