Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -4289200.330 ms |
| Heart (set every hour) | -29246.176 ms |
| Raw crystal (set once) | +7967.361 ms |
| Raw crystal (set every hour) | +36.788 ms |
| This machine's own clock | -1.294 ms |
| Heart time lost to host stalls | +4297173.453 ms |
| Atomic round trip | +5.535 ms |