Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -1827058.846 ms |
| Heart (set every hour) | -36095.961 ms |
| Raw crystal (set once) | +5769.037 ms |
| Raw crystal (set every hour) | +40.106 ms |
| This machine's own clock | -1.989 ms |
| Heart time lost to host stalls | +1832833.830 ms |
| Atomic round trip | +4.616 ms |