Performance
· 26 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.
1.09 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.70 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
75 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.098
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.93 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.
4.59 s
Page Load Progression
FPage Weight BudgetAction3.3 MB transferred, 48 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
CJS Execution CostAction1717ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://btcminex.com/_next/static/chunks/2khxl0v1q4i6n.js | 600ms | 531ms | 20ms | 1st |
| https://btcminex.com/ | 451ms | 34ms | 5ms | 1st |
| Unattributable | 353ms | 26ms | 0ms | 1st |
| https://btcminex.com/_next/static/chunks/1zj_tkyesqjcr.js | 313ms | 277ms | 12ms | 1st |
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 InventoryAction48 resources · 3.3 MB · 81 KB savings availableREVIEW
~81.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 48 resources | 3.3 MiB | ||||||
BJavaScript Blocking1 JS blocking issue(s) detectedREVIEW
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+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints4 hints, 0 missing preconnectsPASS
Current Resource Hints
4 resource hints configured
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
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall48 requests over 4027msINFO
Image Optimization3 images, 2946 KB total, 2371 KB wastedINFO
Image Optimization Audit
Total Images
3
Total Size
2946 KB
Oversized
3
Wasted
2371 KB