Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -4229124.944 ms |
| Heart (set every hour) | -17567.907 ms |
| Raw crystal (set once) | +7865.855 ms |
| Raw crystal (set every hour) | +30.650 ms |
| This machine's own clock | -1.672 ms |
| Heart time lost to host stalls | +4236997.077 ms |
| Atomic round trip | +4.364 ms |