Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -265802.010 ms |
| Heart (set every hour) | -2968.023 ms |
| Raw crystal (set once) | +1322.731 ms |
| Raw crystal (set every hour) | +22.858 ms |
| This machine's own clock | -0.697 ms |
| Heart time lost to host stalls | +267124.455 ms |
| Atomic round trip | +5.136 ms |