Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -9462447.275 ms |
| Heart (set every hour) | -32041.853 ms |
| Raw crystal (set once) | +12076.328 ms |
| Raw crystal (set every hour) | +36.343 ms |
| This machine's own clock | -5.553 ms |
| Heart time lost to host stalls | +9474508.423 ms |
| Atomic round trip | +10.028 ms |