Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -71.498 ms |
| Heart (set every hour) | -6.708 ms |
| Raw crystal (set once) | -71.461 ms |
| Raw crystal (set every hour) | -6.707 ms |
| This machine's own clock | -0.096 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.030 ms |