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

100

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.

344 ms

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

344 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.

0.003

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

344 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.

344 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

15 PASS 4 REVIEW

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.

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+

Page Weight Budget

213 KB transferred, 5 requests

PASS

213 KB transferred, 5 requests

Page weighs 460 KB (213 KB transferred)

5 HTTP requests

Estimated 0.04 g CO2 per page load

213 KB transferred

5 requests

0.04 g CO2 per page load

Images 202.0 KiB 95%

HTML 10.9 KiB 5%

Other 480 B 0%

Other 68 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

0% third-party, 0 ms blocking

PASS

0% third-party, 0 ms blocking

Third-party code accounts for 0% of page weight (480 B of 213.5 KiB)

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

All text resources are properly compressed.

A+

Image Optimization

1 images, 0 KB saveable

PASS

1 images, 0 KB saveable

All images are well-optimized

1 images 202 KB

0 oversized -0 KB

1 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

172ms total JS execution

PASS

172ms total JS execution

https://wifitesting.netlify.app/: 172ms CPU time

Main Thread Breakdown

Other 46% Style & Layout 30% Rendering 20%

Script	Total	Scripting	Parse/Compile	Party
https://wifitesting.netlify.app/	172ms	3ms	1ms	1st

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

JS Bundles

No JavaScript

PASS

No JavaScript

No JavaScript bundles

No JavaScript files loaded.

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

A+

Page Weight Inventory

5 resources · 213 KB · 0 KB savings available

PASS

5 resources · 213 KB · 0 KB savings available

Within 1MB page-weight target

Got: 213 KB

2 third-party resources (0% of weight)

1 resources over 200KB

5 resources · 213.5 KiB · 2 third-party Within 1MB page-weight target

Image 95% · 202.1 KiB

Document 5% · 10.9 KiB

Other 0% · 480 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

5 resources			213.5 KiB

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

5 requests over 435ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

1 images, 202 KB total, 198 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

202 KB

Oversized

Wasted

198 KB

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