Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -22088.659 ms |
| Heart (set every hour) | -4890.147 ms |
| Raw crystal (set once) | +228.645 ms |
| Raw crystal (set every hour) | +35.312 ms |
| This machine's own clock | -0.885 ms |
| Heart time lost to host stalls | +22317.304 ms |
| Atomic round trip | +9.639 ms |