Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -589768.521 ms |
| Heart (set every hour) | -4131.838 ms |
| Raw crystal (set once) | +2960.914 ms |
| Raw crystal (set every hour) | +22.089 ms |
| This machine's own clock | -1.859 ms |
| Heart time lost to host stalls | +592727.845 ms |
| Atomic round trip | +9.529 ms |