Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -116911.599 ms |
| Heart (set every hour) | -6289.995 ms |
| Raw crystal (set once) | +456.615 ms |
| Raw crystal (set every hour) | +24.520 ms |
| This machine's own clock | -1.645 ms |
| Heart time lost to host stalls | +117368.161 ms |
| Atomic round trip | +5.611 ms |