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.
2.58 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.14 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
533 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.170
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.16 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.
6.24 s
Page Load Progression
DJS Execution CostAction3428ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ichingonline.pro/ | 1564ms | 16ms | 59ms | 1st |
| https://ichingonline.pro/_next/static/chunks/0d65ce108889130a.js | 1316ms | 1224ms | 27ms | 1st |
| Unattributable | 403ms | 21ms | 0ms | 1st |
| https://ichingonline.pro/_next/static/chunks/a3c38d7b7eff6aa9.js | 72ms | 54ms | 14ms | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 72ms | 52ms | 0ms | 3rd |
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BJS Bundles27 scripts, 134 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://ichingonline.pro/_next/static/chunks/600943c9ad006790.js | 70 KB | 56 KB (81%) | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/7bfed8026320cb89.js | 69 KB | 54 KB (84%) | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/0d65ce108889130a.js | 71 KB | 24 KB (34%) | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/48da1cbbd4d1a93d.js | 1 KB | — | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/e6458a5e2e9303c9.js | 11 KB | — | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/turbopack-23477a1ed14466e6.js | 5 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 10 KB | — | ✓ | 3rd |
| https://ichingonline.pro/_next/static/chunks/e767791ab1bb9364.js | 8 KB | — | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/8f865f3963f525d3.js | 3 KB | — | ✓ | 1st |
| https://ichingonline.pro/_next/static/chunks/2cb7259ed7329a69.js | 10 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
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
A+Page Weight Budget703 KB transferred, 47 requestsPASS
A+Third-Party Impact1% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image OptimizationNo images on this pagePASS
A+Font Loading4 fonts (124 KB)PASS
Web fonts
4
124 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Page Weight Inventory47 resources · 703 KB · 134 KB savings availablePASS
~133.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 47 resources | 703.1 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall47 requests over 4658msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 72ms | 10 KB | — | €1/mo | Optional |