Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -470953.159 ms |
| Heart (set every hour) | -5108.341 ms |
| Raw crystal (set once) | +2391.277 ms |
| Raw crystal (set every hour) | +23.803 ms |
| This machine's own clock | -0.923 ms |
| Heart time lost to host stalls | +473343.305 ms |
| Atomic round trip | +3.981 ms |