Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -326.577 ms |
| Heart (set every hour) | -3.758 ms |
| Raw crystal (set once) | -326.503 ms |
| Raw crystal (set every hour) | -3.761 ms |
| This machine's own clock | -0.061 ms |
| Heart time lost to host stalls | +0.000 ms |
| Atomic round trip | +1.263 ms |