Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -11639469.569 ms |
| Heart (set every hour) | -34643.557 ms |
| Raw crystal (set once) | +14909.920 ms |
| Raw crystal (set every hour) | +32.405 ms |
| This machine's own clock | -2.294 ms |
| Heart time lost to host stalls | +11654363.923 ms |
| Atomic round trip | +7.120 ms |