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https://verindex.org

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
7
PASS
13
INFO
3

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

Mobile Desktop
44
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
83
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.

2.45 s

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

20.93 s

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

1.04 s

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

0.000

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

6.18 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.

20.93 s

Page Load Progression

584 ms
1.2 s
1.8 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
26
13 PASS 7 REVIEW 3 FIX
F
Page Weight Budget
Action
3.7 MB transferred, 12 requests
FIX
3.7 MB transferred, 12 requests
Warning::
Page weighs 4.9 MB (3.7 MB transferred)
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Info::
12 HTTP requests
Info::
Estimated 0.77 g CO2 per page load
3.7 MB / 2.4 MB budget
3.7 MB transferred
12 requests
0.77 g CO2 per page load
Other 1.8 MiB 49%
Images 1.7 MiB 46%
HTML 168.2 KiB 4%
JavaScript 38.0 KiB 1%
Other 13.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

F
JS Execution Cost
Action
7262ms total JS execution
FIX
7262ms total JS execution
Warning::
https://verindex.org/: 6736ms CPU time
Warning::
Unattributable: 526ms CPU time

Main Thread Breakdown

Style & Layout 40% Rendering 28% Other 15% Script Evaluation 12% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://verindex.org/6736ms820ms23ms1st
Unattributable526ms10ms0ms1st
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache, no-store, must-revalidate
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

no-cache, no-store, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
B
Image Optimization
3 images, 0 KB saveable
REVIEW
3 images, 0 KB saveable
Warning::
https://verindex.org/assets/img/verindex-architett... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://verindex.org/assets/logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
3 images 1.7 MB
0 oversized -0 KB
3 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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
Page Weight Inventory
Action
12 resources · 3.7 MB · 28 KB savings available
REVIEW
12 resources · 3.7 MB · 28 KB savings available
Warning::
Page weight 3.7 MB exceeds 1 MB target by 2.7 MB
Got: 3.7 MB Expected: ≤ 1 MB
Info::
3 third-party resources (0% of weight)
Info::
4 resources over 200KB
12 resources · 3.7 MiB · 3 third-party 2.7 MiB over 1MB target
Other 49% · 1.8 MiB
Image 46% · 1.7 MiB
Document 4% · 168.2 KiB
JavaScript 1% · 38.0 KiB

~27.6 KiB of savings available

Remove unused JavaScript: 27.6 KiB
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
1 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.
Warning::
Total JS execution time is 7.3 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
0% third-party, 0 ms blocking
PASS
0% third-party, 0 ms blocking
Info::
Third-party code accounts for 0% of page weight (1.9 KiB of 3.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A
JS Bundles
2 scripts, 28 KB unused
PASS
2 scripts, 28 KB unused
Warning::
https://verindex.org/assets/js/verindex-auth.js: 28 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://verindex.org/assets/js/verindex-auth.js: unminified — 4 KB could be saved
Info::
Total unused JavaScript: 28 KB
28 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://verindex.org/assets/js/verindex-auth.js37 KB28 KB (76%)✗1st
https://alessandropatane.com/api/tracker.js1 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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+
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+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-cache, no-store, must-revalidate
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
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+
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 1309ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 2.4 s LCP 20.9 shttps://verindex.org// https://verindex.org/ — 200 — 168.2 KiB — 227 ms — h2https://verindex.org/assets/js/verindex-auth.js/assets/js/verindex-auth.js https://verindex.org/assets/js/verindex-auth.js — 200 — 36.7 KiB — 102 ms — h2https://alessandropatane.com/api/tracker.jsalessandropatane.com/api/tracker.js https://alessandropatane.com/api/tracker.js — 200 — 1.3 KiB — 235 ms — h3https://verindex.org/assets/logo.png/assets/logo.png https://verindex.org/assets/logo.png — 200 — 1.3 MiB — 210 ms — h2https://verindex.org/assets/img/verindex-architettura-economia-italiana.jpg/assets/img/verindex-architettura-e... https://verindex.org/assets/img/verindex-architettura-economia-italiana.jpg — 200 — 347.0 KiB — 211 ms — h2https://verindex.org/assets/img/qr-verindex-radio-app.png?v=20261028b/assets/img/qr-verindex-radio-app.p... https://verindex.org/assets/img/qr-verindex-radio-app.png?v=20261028b — 200 — 2.0 KiB — 37 ms — h2https://alessandropatane.com/api/track/initalessandropatane.com/api/track/init https://alessandropatane.com/api/track/init — 204 — 0 B — 156 ms — h3https://verindex.org/api/public/entities.json/api/public/entities.json https://verindex.org/api/public/entities.json — 200 — 1.5 MiB — 108 ms — h2https://verindex.org/api/public/articles.json/api/public/articles.json https://verindex.org/api/public/articles.json — 200 — 317.1 KiB — 112 ms — h2https://alessandropatane.com/api/track/initalessandropatane.com/api/track/init https://alessandropatane.com/api/track/init — 200 — 545 B — 72 ms — h3https://verindex.org/api/public/contracts.json/api/public/contracts.json https://verindex.org/api/public/contracts.json — 200 — 5.8 KiB — 38 ms — h2https://verindex.org/favicon.ico/favicon.ico https://verindex.org/favicon.ico — 200 — 13.3 KiB — 36 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
4 images, 2066 KB total, 1369 KB wasted
INFO

Image Optimization Audit

Total Images

4

Total Size

2066 KB

Oversized

1

Wasted

1369 KB

4 missing dimensions 3 missing lazy loading
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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