Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -6004662.930 ms |
| Heart (set every hour) | -32975.333 ms |
| Raw crystal (set once) | +9858.999 ms |
| Raw crystal (set every hour) | +32.523 ms |
| This machine's own clock | -2.112 ms |
| Heart time lost to host stalls | +6014517.962 ms |
| Atomic round trip | +6.678 ms |