https://ordinepsicologilazio.it/albo-online/roma

Performance

· 26 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.

1.89 s

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

6.16 s

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

105 ms

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

0.020

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

2.24 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.

6.17 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

13 PASS 8 REVIEW 2 FIX

Third-Party Impact

Action

76% third-party, 0 ms blocking

FIX

76% third-party, 0 ms blocking

Third-party code accounts for 76% of page weight (1.4 MiB of 1.9 MiB)

Third-party blocking time is low (0 ms)

24%

76%

First-party Third-party

Page Weight Inventory

Action

46 resources · 1.9 MB · 42 KB savings available

FIX

46 resources · 1.9 MB · 42 KB savings available

Page weight 1.9 MB exceeds 1 MB target by 921 KB

Got: 1.9 MB Expected: ≤ 1 MB

15 third-party resources (76% of weight)

1 resources over 200KB

46 resources · 1.9 MiB · 15 third-party 921.3 KiB over 1MB target

Image 77% · 1.5 MiB

JavaScript 9% · 173.0 KiB

Font 8% · 146.7 KiB

CSS 6% · 113.6 KiB

Document 0% · 9.4 KiB

Other 0% · 150 B

~42.2 KiB of savings available

Remove unused JavaScript: 42.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

46 resources			1.9 MiB

Page Weight Budget

Action

1.9 MB transferred, 46 requests

REVIEW

1.9 MB transferred, 46 requests

Page weighs 2.9 MB (1.9 MB transferred)

Images are 1.4 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 1.4 MB

46 HTTP requests

Estimated 0.40 g CO2 per page load

1.9 MB transferred

46 requests

0.40 g CO2 per page load

Images 1.4 MiB 75%

JavaScript 173.0 KiB 9%

Fonts 146.7 KiB 8%

CSS 113.6 KiB 6%

Other 52.1 KiB 3%

HTML 9.4 KiB 0%

Other 150 B 0%

0 2.4 MB 4.9 MB

Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Image Optimization

13 images, 0 KB saveable

REVIEW

13 images, 0 KB saveable

All images are well-optimized

13 images 1.4 MB

0 oversized -0 KB

13 legacy format

0 missing dimensions CLS risk

JS Execution Cost

Action

1603ms total JS execution

REVIEW

1603ms total JS execution

https://ordinepsicologilazio.it/albo-online/roma: 812ms CPU time

Unattributable: 347ms CPU time

https://ordinepsicologilazio.it/media/vendor/jquer...: 306ms CPU time

https://ordinepsicologilazio.it/templates/bsitalia...: 88ms CPU time

https://ordinepsicologilazio.it/templates/bsitalia...: 50ms CPU time

Main Thread Breakdown

Other 34% Style & Layout 29% Script Evaluation 19% Parse HTML & CSS 7% Rendering 6% Script Parsing & Compilation 3%

Script	Total	Scripting	Parse/Compile	Party
https://ordinepsicologilazio.it/albo-online/roma	812ms	22ms	4ms	1st
Unattributable	347ms	18ms	0ms	1st
https://ordinepsicologilazio.it/media/vendor/jquery/js/jquery.min.js?3.7.1	306ms	147ms	6ms	1st
https://ordinepsicologilazio.it/templates/bsitalia/js/bootstrap-italia.min.js?f336a069182e45b9466ec5c0c2e12fc6	88ms	40ms	23ms	1st
https://ordinepsicologilazio.it/templates/bsitalia/css/template.min.css?f336a069182e45b9466ec5c0c2e12fc6	50ms	0ms	0ms	1st

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

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.

JavaScript Blocking

1 JS blocking issue(s) detected

REVIEW

1 JS blocking issue(s) detected

8 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.

CSS Performance Depth

2 CSS depth issue(s) detected

REVIEW

2 CSS depth issue(s) detected

7 render-blocking stylesheet(s) -- recommended: <=3

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.

16 `@font-face` rule(s) without `font-display` -- causes FOIT

An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.

HTTP Caching

no-cache

REVIEW

no-cache

Cache-Control header is set

Got: no-cache

ETag present — enables conditional (304) responses

Last-Modified header present

Cache-Control

no-cache

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

5 fonts (147 KB)

PASS

5 fonts (147 KB)

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

Web fonts

147 KB total

Render-blocking

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

TitilliumWeb-Light.woff2 woff2 swap

Size 18 KB

Load time 37 ms

Start 439 ms