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https://btcminex.com

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
0
REVIEW
5
PASS
18
INFO
3

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

Mobile Desktop
100
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.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

1.07 s

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

1.07 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.

0.000

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

1.08 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.

1.07 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
26
18 PASS 5 REVIEW
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
Main HTML Cache-Control
Cache-Control present but without max-age
REVIEW
Cache-Control present but without max-age
Info::
Main HTML Cache-Control has no max-age: s-maxage=31536000
Got: s-maxage=31536000
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
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
s-maxage=31536000
REVIEW
s-maxage=31536000
Info::
Cache-Control header is set
Got: s-maxage=31536000
Info::
CDN TTL: 52 weeks (s-maxage=31536000)
Info::
ETag present — enables conditional (304) responses
Cache-Control

s-maxage=31536000

DirectiveValueMeaning
s-maxage31536000CDN caches for 52 weeks
A+
Page Weight Budget
88 KB transferred, 16 requests
PASS
88 KB transferred, 16 requests
Info::
Page weighs 233 KB (88 KB transferred)
Info::
16 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
88 KB / 2.4 MB budget
88 KB transferred
16 requests
0.02 g CO2 per page load
Images 54.6 KiB 62%
CSS 15.1 KiB 17%
HTML 13.5 KiB 15%
Other 3.3 KiB 4%
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
Info::
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
Info::
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
Info::
All images are well-optimized
1 images 55 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
262ms total JS execution
PASS
262ms total JS execution
Info::
https://btcminex.com/: 143ms CPU time
Info::
Unattributable: 119ms CPU time

Main Thread Breakdown

Other 55% Parse HTML & CSS 22% Style & Layout 17% Script Evaluation 4%
ScriptTotalScriptingParse/CompileParty
https://btcminex.com/143ms5ms1ms1st
Unattributable119ms5ms0ms1st
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
11 scripts, 0 KB unused
PASS
11 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/0z_3jniom1p9u.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/29017sj3i6d24.js0 KB—✓1st
https://btcminex.com/_next/static/chunks/339zq_tsbuphk.js0 KB—✓1st
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 resource hints configured

A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
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
Info::
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
Info::
`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).
Info::
`ETag` present -- conditional GET supported
A+
Page Weight Inventory
16 resources · 88 KB · 0 KB savings available
PASS
16 resources · 88 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 88 KB
16 resources · 87.7 KiB · 0 third-party Within 1MB page-weight target
Image 66% · 57.9 KiB
CSS 17% · 15.1 KiB
Document 15% · 13.5 KiB
Other 1% · 1.1 KiB
JavaScript 0% · 0 B
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 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.
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
16 requests over 622ms
INFO
0 ms 500 ms 1.0 s FCP 1.1 s LCP 1.1 shttps://btcminex.com// https://btcminex.com/ — 200 — 13.5 KiB — 220 ms — h2https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js/_next/static/chunks/1x6obpmlu1_c2.... https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js/_next/static/chunks/1-nqmp1rl8kqt.... https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/2cafqi07p7n-s.css/_next/static/chunks/2cafqi07p7n-s.... https://btcminex.com/_next/static/chunks/2cafqi07p7n-s.css — 200 — 15.1 KiB — 173 ms — h2https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js/_next/static/chunks/2khxl0v1q4i6n.... https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js/_next/static/chunks/1zj_tkyesqjcr.... https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js/_next/static/chunks/turbopack-3-ry... https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/0z_3jniom1p9u.js/_next/static/chunks/0z_3jniom1p9u.... https://btcminex.com/_next/static/chunks/0z_3jniom1p9u.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js/_next/static/chunks/3sd-tblx53csz.... https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js/_next/static/chunks/1de8cc-ye8ywp.... https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/29017sj3i6d24.js/_next/static/chunks/29017sj3i6d24.... https://btcminex.com/_next/static/chunks/29017sj3i6d24.js — -1 — 0 B — 0 ms — https://btcminex.com/_next/static/chunks/339zq_tsbuphk.js/_next/static/chunks/339zq_tsbuphk.... https://btcminex.com/_next/static/chunks/339zq_tsbuphk.js — -1 — 0 B — 0 ms — https://btcminex.com/images/banner-1-mobile.webp/images/banner-1-mobile.webp https://btcminex.com/images/banner-1-mobile.webp — 200 — 54.6 KiB — 196 ms — h2https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js/_next/static/chunks/1x6obpmlu1_c2.... https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js — -1 — 0 B — 0 ms — https://btcminex.com/manifest.webmanifest/manifest.webmanifest https://btcminex.com/manifest.webmanifest — 200 — 1.1 KiB — 168 ms — h3https://btcminex.com/favicon.ico/favicon.ico https://btcminex.com/favicon.ico — 200 — 3.3 KiB — 178 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
3 images, 150 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

3

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.

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