Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -20.827 ms |
| Heart (set every hour) | -0.935 ms |
| Raw crystal (set once) | -20.816 ms |
| Raw crystal (set every hour) | -0.933 ms |
| This machine's own clock | +0.359 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +0.903 ms |