Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -660434.781 ms |
| Heart (set every hour) | -7563.272 ms |
| Raw crystal (set once) | +3254.293 ms |
| Raw crystal (set every hour) | +25.313 ms |
| This machine's own clock | -1.319 ms |
| Heart time lost to host stalls | +663687.283 ms |
| Atomic round trip | +5.360 ms |