Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -10185201.827 ms |
| Heart (set every hour) | -19781.067 ms |
| Raw crystal (set once) | +13015.161 ms |
| Raw crystal (set every hour) | +25.048 ms |
| This machine's own clock | -2.056 ms |
| Heart time lost to host stalls | +10198196.876 ms |
| Atomic round trip | +6.683 ms |