Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -13.156 ms |
| Heart (set every hour) | -1.681 ms |
| Raw crystal (set once) | -13.158 ms |
| Raw crystal (set every hour) | -1.678 ms |
| This machine's own clock | -2.199 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +6.893 ms |