Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -10941712.513 ms |
| Heart (set every hour) | -17245.299 ms |
| Raw crystal (set once) | +14053.174 ms |
| Raw crystal (set every hour) | +26.502 ms |
| This machine's own clock | -2.832 ms |
| Heart time lost to host stalls | +10955740.157 ms |
| Atomic round trip | +4.127 ms |