https://rocoarighi-test-alpha.netlify.app

Performance

· 21 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

100

Accessibility

100

Best Practices

SEO

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

1.72 s

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

1.88 s

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.

1.72 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.

1.88 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

10 PASS 7 REVIEW 2 FIX

Third-Party Impact

Action

79% third-party, 0 ms blocking

FIX

79% third-party, 0 ms blocking

Third-party code accounts for 79% of page weight (1.1 MiB of 1.3 MiB)

Third-party blocking time is low (0 ms)

21%

79%

First-party Third-party

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private,no-cache,no-store,max-age=0,must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private,no-cache,no-store,max-age=0,must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

Page Weight Budget

1.3 MB transferred, 52 requests

REVIEW

1.3 MB transferred, 52 requests

Page weighs 4.6 MB (1.3 MB transferred)

JavaScript is 1.0 MB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 1.0 MB

52 HTTP requests

Estimated 0.28 g CO2 per page load

1.3 MB transferred

52 requests

0.28 g CO2 per page load

JavaScript 1.0 MiB 75%

CSS 97.7 KiB 7%

Fonts 79.9 KiB 6%

Images 75.2 KiB 5%

HTML 73.5 KiB 5%

Other 11.7 KiB 1%

Other 11.5 KiB 1%

Other 361 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Image Optimization

7 images, 0 KB saveable

REVIEW

7 images, 0 KB saveable

All images are well-optimized

7 images 75 KB

0 oversized -0 KB

5 legacy format

0 missing dimensions CLS risk

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.

Compression Algorithm

Main response uses gzip; brotli would be ~20% smaller

REVIEW

Main response uses gzip; brotli would be ~20% smaller

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.

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.

Page Weight Inventory

Action

52 resources · 1.3 MB · 48 KB savings available

REVIEW

52 resources · 1.3 MB · 48 KB savings available

Page weight 1.3 MB exceeds 1 MB target by 358 KB

Got: 1.3 MB Expected: ≤ 1 MB

18 third-party resources (79% of weight)

2 resources over 200KB

52 resources · 1.3 MiB · 18 third-party 357.7 KiB over 1MB target

JavaScript 75% · 1.0 MiB

CSS 7% · 97.7 KiB

Font 6% · 79.9 KiB

Image 6% · 78.1 KiB

Document 5% · 73.5 KiB

Other 1% · 11.1 KiB

~48.4 KiB of savings available

Remove unused JavaScript: 48.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

52 resources			1.3 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

JS Execution Cost

274ms total JS execution

PASS

274ms total JS execution

https://rocoarighi-test-alpha.netlify.app/: 130ms CPU time

Unattributable: 76ms CPU time

https://rocoarighi-test-alpha.netlify.app/_next/st...: 68ms CPU time

Main Thread Breakdown

Other 42% Script Evaluation 32% Style & Layout 16% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://rocoarighi-test-alpha.netlify.app/	130ms	2ms	5ms	1st
Unattributable	76ms	4ms	0ms	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/10u3y4bw1ayzs.js	68ms	62ms	4ms	1st

A+

Font Loading

3 fonts (80 KB)

PASS

3 fonts (80 KB)

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

Web fonts

80 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

KFO7CnqEu92Fr1ME7kSn66a... woff2 swap

Size 34 KB

Load time 66 ms

Start 675 ms

Risk FOUT — text flashes from fallback to web font

0c89a48fa5027cee-s.p.0r... woff2 swap

Size 22 KB

Load time 172 ms

Start 719 ms

Risk FOUT — text flashes from fallback to web font

a343f882a40d2cc9-s.p.0k... woff2 swap

Size 24 KB

Load time 269 ms

Start 720 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

19 scripts, 48 KB unused

PASS

19 scripts, 48 KB unused

https://rocoarighi-test-alpha.netlify.app/_next/st...: 26 KB unused (38%)

Consider code splitting or tree shaking to reduce unused code.

https://rocoarighi-test-alpha.netlify.app/_next/st...: 23 KB unused (51%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 48 KB

48 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/10u3y4bw1ayzs.js	67 KB	26 KB (38%)	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0~6pi17p4g3wz.js	45 KB	23 KB (51%)	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0ia4adgrktq54.js	10 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/turbopack-0a0j4y2w1r4gb.js	4 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/01xlw8hd842-c.js	1 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0d3shmwh5_nmn.js	12 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0fmv_d3cw9_gc.js	5 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0s47h3fj6zbgc.js	12 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/033g87j5nlof8.js	9 KB	—	✓	1st
https://rocoarighi-test-alpha.netlify.app/_next/static/chunks/0gy5b19ykjtbi.js	3 KB	—	✓	1st

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

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

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+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

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

Got: private,no-cache,no-store,max-age=0,must-revalidate

A+

Server Response Intelligence

3 server-response signal(s) detected

PASS

3 server-response signal(s) detected

`Cache-Status` header present (RFC 9211): "Netlify Durable"; fwd=bypass, "Netlify Edge"; fwd=miss; fwd-status=200

The page returns a `Cache-Status` header -- the standardized way for CDNs and caches to communicate per-hop cache state to debugging tools. Format: `Cache-Status: cdn-name; hit; ttl=300` (or `; fwd=miss` / `; fwd=stale`). Standard alternative to vendor-specific `X-Cache` patterns each CDN had historically. Cloudflare, Fastly, and Akamai all support emitting it.

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch,...

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).

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.

Network Waterfall

52 requests over 3645ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

3 images, 14 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

14 KB

1 missing lazy loading

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