Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -12584791.108 ms |
| Heart (set every hour) | -470.426 ms |
| Raw crystal (set once) | +15778.601 ms |
| Raw crystal (set every hour) | +0.414 ms |
| This machine's own clock | -1.942 ms |
| Heart time lost to host stalls | +12600564.798 ms |
| Atomic round trip | +10.085 ms |