Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -47.215 ms |
| Heart (set every hour) | -1.308 ms |
| Raw crystal (set once) | -47.186 ms |
| Raw crystal (set every hour) | -1.309 ms |
| This machine's own clock | +0.190 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.571 ms |