Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -63.677 ms |
| Heart (set every hour) | +0.895 ms |
| Raw crystal (set once) | -63.708 ms |
| Raw crystal (set every hour) | +0.893 ms |
| This machine's own clock | +0.533 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.110 ms |