Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -239117.409 ms |
| Heart (set every hour) | -2228.082 ms |
| Raw crystal (set once) | +1128.525 ms |
| Raw crystal (set every hour) | +25.372 ms |
| This machine's own clock | -0.584 ms |
| Heart time lost to host stalls | +240246.152 ms |
| Atomic round trip | +4.289 ms |