Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -299958.506 ms |
| Heart (set every hour) | -1673.397 ms |
| Raw crystal (set once) | +1514.009 ms |
| Raw crystal (set every hour) | +19.293 ms |
| This machine's own clock | -0.264 ms |
| Heart time lost to host stalls | +301472.083 ms |
| Atomic round trip | +9.181 ms |