Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

A+

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

100

Performance

Accessibility

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.

416 ms

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

416 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.

0.000

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

633 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.

416 ms

Page Load Progression

443 ms

887 ms

1.3 s

1.8 s

2.2 s

2.7 s

3.1 s

3.5 s

Checks

14 PASS 5 REVIEW

Document Compression

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

REVIEW

Document 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.

Main HTML Cache-Control

Cache-Control present but without max-age

REVIEW

Cache-Control present but without max-age

Main HTML Cache-Control has no max-age: s-maxage=31536000

Got: s-maxage=31536000

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

s-maxage=31536000

REVIEW

s-maxage=31536000

Cache-Control header is set

Got: s-maxage=31536000

CDN TTL: 52 weeks (s-maxage=31536000)

ETag present — enables conditional (304) responses

Cache-Control

s-maxage=31536000

Directive	Value	Meaning
s-maxage	31536000	CDN caches for 52 weeks

A+

Page Weight Budget

184 KB transferred, 16 requests

PASS

184 KB transferred, 16 requests

Page weighs 329 KB (184 KB transferred)

16 HTTP requests

Estimated 0.04 g CO2 per page load

184 KB transferred

16 requests

0.04 g CO2 per page load

Images 150.6 KiB 82%

CSS 15.2 KiB 8%

HTML 13.5 KiB 7%

Other 3.3 KiB 2%

Other 1.1 KiB 1%

JavaScript 0 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-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 151 KB

0 oversized -0 KB

0 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

No JS execution data

PASS

No JS execution data

No significant JS execution detected

Main Thread Breakdown

Other 62% Style & Layout 18% Parse HTML & CSS 14% Script Evaluation 5%

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

11 scripts, 0 KB unused

PASS

11 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Unused	Minified	Party
https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js	—	✓	1st
https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js	—	✓	1st
https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js	—	✓	1st
https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js	—	✓	1st
https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js	—	✓	1st
https://btcminex.com/_next/static/chunks/0z_3jniom1p9u.js	—	✓	1st
https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js	—	✓	1st
https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js	—	✓	1st
https://btcminex.com/_next/static/chunks/29017sj3i6d24.js	—	✓	1st
https://btcminex.com/_next/static/chunks/339zq_tsbuphk.js	—	✓	1st

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+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

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+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`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).

`ETag` present -- conditional GET supported

A+

Page Weight Inventory

16 resources · 184 KB · 0 KB savings available

PASS

16 resources · 184 KB · 0 KB savings available

Within 1MB page-weight target

Got: 184 KB

16 resources · 183.8 KiB · 0 third-party Within 1MB page-weight target

Image 84% · 153.9 KiB

CSS 8% · 15.2 KiB

Document 7% · 13.5 KiB

Other 1% · 1.1 KiB

JavaScript 0% · 0 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

16 resources			183.8 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

16 requests over 1234ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

3 images, 150 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

150 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.