Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -55.739 ms |
| Heart (set every hour) | -1.372 ms |
| Raw crystal (set once) | -55.740 ms |
| Raw crystal (set every hour) | -1.378 ms |
| This machine's own clock | +0.304 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.281 ms |