Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -333064.330 ms |
| Heart (set every hour) | -4431.292 ms |
| Raw crystal (set once) | +1711.989 ms |
| Raw crystal (set every hour) | +24.908 ms |
| This machine's own clock | -1.671 ms |
| Heart time lost to host stalls | +334775.722 ms |
| Atomic round trip | +6.421 ms |