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Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
6
PASS
13
INFO
2

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.
77
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

421 ms

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

661 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.

556 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.

661 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
21
13 PASS 6 REVIEW
B
JS Bundles
12 scripts, 77 KB unused
REVIEW
12 scripts, 77 KB unused
Warning::
https://btcminex.com/_next/static/chunks/3sd-tblx5...: 54 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://btcminex.com/_next/static/chunks/2khxl0v1q...: 23 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 77 KB
77 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js67 KB54 KB (82%)✓1st
https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js71 KB23 KB (32%)✓1st
https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js2 KB—✓1st
https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js9 KB—✓1st
https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js44 KB—✓1st
https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js4 KB—✓1st
https://btcminex.com/_next/static/chunks/0_9k7v6e6qlhl.js5 KB—✓1st
https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js6 KB—✓1st
https://btcminex.com/_next/static/chunks/29017sj3i6d24.js5 KB—✓1st
https://btcminex.com/_next/static/chunks/0hhkxzd1lfesf.js19 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

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
281 KB transferred, 21 requests
PASS
281 KB transferred, 21 requests
Info::
Page weighs 991 KB (281 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
281 KB / 2.4 MB budget
281 KB transferred
21 requests
0.06 g CO2 per page load
JavaScript 245.7 KiB 88%
CSS 14.7 KiB 5%
Other 11.3 KiB 4%
HTML 4.6 KiB 2%
Other 3.1 KiB 1%
Other 1.3 KiB 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
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
74ms total JS execution
PASS
74ms total JS execution
Info::
https://btcminex.com/_next/static/chunks/2khxl0v1q...: 74ms CPU time

Main Thread Breakdown

Script Evaluation 55% Other 22% Script Parsing & Compilation 11% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js74ms56ms6ms1st
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+
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
21 resources · 281 KB · 77 KB savings available
PASS
21 resources · 281 KB · 77 KB savings available
Info::
Within 1MB page-weight target
Got: 281 KB
Info::
~77 KB of savings available
21 resources · 280.6 KiB · 0 third-party Within 1MB page-weight target
JavaScript 88% · 245.7 KiB
CSS 5% · 14.7 KiB
Other 4% · 12.5 KiB
Document 2% · 4.6 KiB
Image 1% · 3.1 KiB

~77.0 KiB of savings available

Remove unused JavaScript: 77.0 KiB
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
21 requests over 1711ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 421 ms LCP 661 mshttps://btcminex.com// https://btcminex.com/ — 200 — 4.6 KiB — 176 ms — h2https://btcminex.com/_next/static/chunks/0qki2nlndkvvf.css/_next/static/chunks/0qki2nlndkvvf.... https://btcminex.com/_next/static/chunks/0qki2nlndkvvf.css — 200 — 14.7 KiB — 190 ms — h2https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js/_next/static/chunks/1x6obpmlu1_c2.... https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js — 200 — 2.1 KiB — 171 ms — h2https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js/_next/static/chunks/1-nqmp1rl8kqt.... https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js — 200 — 8.8 KiB — 236 ms — h3https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js/_next/static/chunks/2khxl0v1q4i6n.... https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js — 200 — 70.7 KiB — 358 ms — h3https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js/_next/static/chunks/1zj_tkyesqjcr.... https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js — 200 — 44.5 KiB — 562 ms — h3https://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 — 200 — 4.2 KiB — 239 ms — h3https://btcminex.com/_next/static/chunks/0_9k7v6e6qlhl.js/_next/static/chunks/0_9k7v6e6qlhl.... https://btcminex.com/_next/static/chunks/0_9k7v6e6qlhl.js — 200 — 4.6 KiB — 331 ms — h3https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js/_next/static/chunks/3sd-tblx53csz.... https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js — 200 — 66.6 KiB — 363 ms — h3https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js/_next/static/chunks/1de8cc-ye8ywp.... https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js — 200 — 6.1 KiB — 230 ms — h3https://btcminex.com/_next/static/chunks/29017sj3i6d24.js/_next/static/chunks/29017sj3i6d24.... https://btcminex.com/_next/static/chunks/29017sj3i6d24.js — 200 — 4.6 KiB — 332 ms — h3https://btcminex.com/_next/static/chunks/0hhkxzd1lfesf.js/_next/static/chunks/0hhkxzd1lfesf.... https://btcminex.com/_next/static/chunks/0hhkxzd1lfesf.js — 200 — 18.6 KiB — 249 ms — h3https://btcminex.com/manifest.webmanifest/manifest.webmanifest https://btcminex.com/manifest.webmanifest — 200 — 664 B — 198 ms — h3https://btcminex.com/favicon.ico/favicon.ico https://btcminex.com/favicon.ico — 200 — 3.1 KiB — 165 ms — h3https://btcminex.com/login?_rsc=FhzSgLhrJVPy6BDs/login?_rsc=FhzSgLhrJVPy6BDs https://btcminex.com/login?_rsc=FhzSgLhrJVPy6BDs — 200 — 3.6 KiB — 167 ms — h3https://btcminex.com/login?_rsc=FhzSgLhrJVPy6BDs/login?_rsc=FhzSgLhrJVPy6BDs https://btcminex.com/login?_rsc=FhzSgLhrJVPy6BDs — 200 — 3.6 KiB — 332 ms — h3https://btcminex.com/_next/static/chunks/0yf_gc1r9geo0.js/_next/static/chunks/0yf_gc1r9geo0.... https://btcminex.com/_next/static/chunks/0yf_gc1r9geo0.js — 200 — 7.2 KiB — 168 ms — h3https://btcminex.com/register?_rsc=_H_fFy2_Q06N8BA7/register?_rsc=_H_fFy2_Q06N8BA7 https://btcminex.com/register?_rsc=_H_fFy2_Q06N8BA7 — 200 — 609 B — 167 ms — h3https://btcminex.com/manifest.webmanifest/manifest.webmanifest https://btcminex.com/manifest.webmanifest — 200 — 629 B — 183 ms — h3https://btcminex.com/register?_rsc=4CX9Kx2ops_BzLX1/register?_rsc=4CX9Kx2ops_BzLX1 https://btcminex.com/register?_rsc=4CX9Kx2ops_BzLX1 — 200 — 3.5 KiB — 170 ms — h3https://btcminex.com/_next/static/chunks/3l51ty9lq7k89.js/_next/static/chunks/3l51ty9lq7k89.... https://btcminex.com/_next/static/chunks/3l51ty9lq7k89.js — 200 — 7.6 KiB — 174 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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