Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -940051.734 ms |
| Heart (set every hour) | -18483.487 ms |
| Raw crystal (set once) | +4324.263 ms |
| Raw crystal (set every hour) | +29.413 ms |
| This machine's own clock | -1.549 ms |
| Heart time lost to host stalls | +944376.791 ms |
| Atomic round trip | +9.633 ms |