Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -137.693 ms |
| Heart (set every hour) | -8.204 ms |
| Raw crystal (set once) | -137.661 ms |
| Raw crystal (set every hour) | -8.206 ms |
| This machine's own clock | -0.084 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.137 ms |