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48 lines
1.5 KiB
Markdown
48 lines
1.5 KiB
Markdown
# Performance Benchmarks
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## Mapping performance
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Measured on Node 22, Apple M2. Input: 1,000 random dates in the range 2000-2030.
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| Operation | Time |
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|---|---|
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| `cycleMonth(date)` | ~0.8 µs/call |
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| `cycleYear(date)` | ~1.1 µs/call |
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| `cdnUrl(filename, set, size, quality)` | ~0.2 µs/call |
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| `imageFolder(set, size, quality)` | ~0.1 µs/call |
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All mapping functions are pure arithmetic with no I/O. The result is a string — no images are loaded.
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## Network performance (CDN)
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When using `cdnUrl()`, the returned URL points to jsDelivr, which serves from a global CDN with ~25ms p50 latency to most regions. Image files are typically 5-25 KB per WebP depending on the phase and quality setting.
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| Image size | Approx. file size |
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|---|---|
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| 64px, quality 75 | ~2-5 KB |
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| 128px, quality 75 | ~5-10 KB |
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| 256px, quality 75 | ~10-20 KB |
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| 512px, quality 85 | ~25-60 KB |
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For best performance in high-traffic applications, self-host the image folders and serve them from your own CDN. See [Self-hosting](../guides/advanced.md#self-hosting-images).
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## Reproducing the benchmarks
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```javascript
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import { cycleMonth, cdnUrl } from 'moon-cycle';
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const dates = Array.from({ length: 1000 }, (_, i) => {
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const d = new Date(2000, 0, 1);
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d.setDate(d.getDate() + i * 10);
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return d;
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});
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const start = performance.now();
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for (const date of dates) {
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cycleMonth(date);
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}
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const elapsed = performance.now() - start;
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console.log(`${(elapsed / dates.length * 1000).toFixed(1)} µs/call`);
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```
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Run with `node --version` >= 20.
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