Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -592.971 ms |
| Heart (set every hour) | -12.429 ms |
| Raw crystal (set once) | -593.001 ms |
| Raw crystal (set every hour) | -12.426 ms |
| This machine's own clock | +0.008 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.088 ms |