https://playful-starlight-93aaa4.netlify.app

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

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.

558 ms

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

827 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.

0.519

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

1.11 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.

827 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

11 PASS 8 REVIEW

Page Weight Budget

Action

1.6 MB transferred, 38 requests

REVIEW

1.6 MB transferred, 38 requests

Page weighs 1.9 MB (1.6 MB transferred)

Images are 1.3 MB — compress or use modern formats

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

Got: 1.3 MB

38 HTTP requests

Estimated 0.33 g CO2 per page load

1.6 MB transferred

38 requests

0.33 g CO2 per page load

Images 1.3 MiB 85%

Fonts 113.8 KiB 7%

JavaScript 60.2 KiB 4%

CSS 49.2 KiB 3%

HTML 11.8 KiB 1%

Other 1.3 KiB 0%

Other 361 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

16 images, 0 KB saveable

REVIEW

16 images, 0 KB saveable

All images are well-optimized

16 images 1.3 MB

0 oversized -0 KB

13 legacy format

0 missing dimensions CLS risk

JS Bundles

7 scripts, 0 KB unused

REVIEW

7 scripts, 0 KB unused

https://playful-starlight-93aaa4.netlify.app/data/...: unminified — 3 KB could be saved

https://playful-starlight-93aaa4.netlify.app/js/ap...: unminified — 8 KB could be saved

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://playful-starlight-93aaa4.netlify.app/data/catalogo.js	8 KB	—	✗	1st
https://playful-starlight-93aaa4.netlify.app/js/config.js	1 KB	—	✓	1st
https://playful-starlight-93aaa4.netlify.app/js/app.js?v=20261011-r4	29 KB	—	✗	1st
https://playful-starlight-93aaa4.netlify.app/js/catalogo-inteligente.js?v=20261011-r4	3 KB	—	✓	1st
https://playful-starlight-93aaa4.netlify.app/js/capsule-navigation.js?v=20261015-r10-8	5 KB	—	✓	1st
https://playful-starlight-93aaa4.netlify.app/js/textilia-referencia.js?v=20261015-r9	4 KB	—	✓	1st
https://playful-starlight-93aaa4.netlify.app/.netlify/scripts/hud?variant=public	11 KB	—	✓	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.

Page Weight Inventory

Action

38 resources · 1.6 MB · 0 KB savings available

REVIEW

38 resources · 1.6 MB · 0 KB savings available

Page weight 1.6 MB exceeds 1 MB target by 581 KB

Got: 1.6 MB Expected: ≤ 1 MB

3 third-party resources (7% of weight)

3 resources over 200KB

38 resources · 1.6 MiB · 3 third-party 580.6 KiB over 1MB target

Image 85% · 1.3 MiB

Font 7% · 113.8 KiB

JavaScript 4% · 60.2 KiB

CSS 3% · 49.2 KiB

Document 1% · 11.8 KiB

Other 0% · 1.3 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

38 resources			1.6 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

HTTP Caching

public,max-age=0,must-revalidate

REVIEW

public,max-age=0,must-revalidate

Cache-Control header is set

Got: public,max-age=0,must-revalidate

ETag present — enables conditional (304) responses

Cache-Control

public,max-age=0,must-revalidate

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

A+

Third-Party Impact

7% third-party, 0 ms blocking

PASS

7% third-party, 0 ms blocking

Third-party code accounts for 7% of page weight (115.2 KiB of 1.6 MiB)

Third-party blocking time is low (0 ms)

93%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

JS Execution Cost

257ms total JS execution

PASS

257ms total JS execution

https://playful-starlight-93aaa4.netlify.app/: 184ms CPU time

Unattributable: 73ms CPU time

Main Thread Breakdown

Style & Layout 50% Other 27% Script Evaluation 9% Rendering 9% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://playful-starlight-93aaa4.netlify.app/	184ms	1ms	0ms	1st
Unattributable	73ms	2ms	0ms	1st

A+

Font Loading

2 fonts (114 KB)

PASS

2 fonts (114 KB)

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

Web fonts

114 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

UcC73FwrK3iLTeHuS_nVMrM... woff2 swap

Size 48 KB

Load time 439 ms

Start 1.0 s

Risk FOUT — text flashes from fallback to web font

6NU78FyLNQOQZAnv9bYEvDi... woff2 swap

Size 66 KB

Load time 467 ms

Start 1.0 s

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+

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+

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+

Main HTML Cache-Control

Main HTML max-age=0 (≤ 5min) is appropriate

PASS

Main HTML max-age=0 (≤ 5min) is appropriate

Got: public,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 Edge"; fwd=miss; fwd-status=200; stored

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: 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).

`ETag` present -- conditional GET supported

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

38 requests over 2119ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

34 images, 239 KB total, 208 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

239 KB

Oversized

Wasted

208 KB

34 missing dimensions

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