Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -10658991.596 ms |
| Heart (set every hour) | -17627.379 ms |
| Raw crystal (set once) | +13579.266 ms |
| Raw crystal (set every hour) | +24.601 ms |
| This machine's own clock | -1.298 ms |
| Heart time lost to host stalls | +10672547.802 ms |
| Atomic round trip | +5.929 ms |