Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -250557.939 ms |
| Heart (set every hour) | -3507.177 ms |
| Raw crystal (set once) | +1227.519 ms |
| Raw crystal (set every hour) | +25.236 ms |
| This machine's own clock | -0.352 ms |
| Heart time lost to host stalls | +251785.247 ms |
| Atomic round trip | +4.037 ms |