Performance
· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
408 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.81 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.
0.011
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.41 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.
1.93 s
Page Load Progression
FPage Weight BudgetAction3.3 MB transferred, 45 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
BJS Bundles17 scripts, 81 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://btcminex.com/_next/static/chunks/3sd-tblx53csz.js | 67 KB | 55 KB (82%) | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js | 71 KB | 27 KB (38%) | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/29017sj3i6d24.js | 5 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/3mxcqef2d4fwa.js | 20 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/turbopack-3-ry682tkyiqk.js | 5 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/0z_3jniom1p9u.js | 5 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/1-nqmp1rl8kqt.js | 9 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/1de8cc-ye8ywp.js | 7 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/1x6obpmlu1_c2.js | 3 KB | — | ✓ | 1st |
| https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js | 45 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BMain HTML Cache-ControlCache-Control present but without max-ageREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CPage Weight InventoryAction45 resources · 3.3 MB · 81 KB savings availableREVIEW
~81.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 45 resources | 3.3 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachings-maxage=31536000REVIEW
s-maxage=31536000
| Directive | Value | Meaning |
|---|---|---|
| s-maxage | 31536000 | CDN caches for 52 weeks |
A+Third-Party ImpactNo third-party resourcesPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization3 images, 0 KB saveablePASS
A+JS Execution Cost351ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js | 185ms | 168ms | 4ms | 1st |
| https://btcminex.com/ | 94ms | 3ms | 1ms | 1st |
| Unattributable | 72ms | 5ms | 0ms | 1st |
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall45 requests over 2799msINFO
Image Optimization3 images, 2946 KB total, 2371 KB wastedINFO
Image Optimization Audit
Total Images
3
Total Size
2946 KB
Oversized
3
Wasted
2371 KB