Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -435958.240 ms |
| Heart (set every hour) | -3345.610 ms |
| Raw crystal (set once) | +2193.358 ms |
| Raw crystal (set every hour) | +20.777 ms |
| This machine's own clock | -0.423 ms |
| Heart time lost to host stalls | +438150.620 ms |
| Atomic round trip | +4.409 ms |