Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -1470615.997 ms |
| Heart (set every hour) | -13330.833 ms |
| Raw crystal (set once) | +5268.171 ms |
| Raw crystal (set every hour) | +19.759 ms |
| This machine's own clock | -0.496 ms |
| Heart time lost to host stalls | +1475888.308 ms |
| Atomic round trip | +3.895 ms |