Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -206511.518 ms |
| Heart (set every hour) | -33055.576 ms |
| Raw crystal (set once) | +517.559 ms |
| Raw crystal (set every hour) | +36.564 ms |
| This machine's own clock | +0.020 ms |
| Heart time lost to host stalls | +207029.038 ms |
| Atomic round trip | +5.703 ms |