Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -492344.188 ms |
| Heart (set every hour) | -4647.368 ms |
| Raw crystal (set once) | +2477.480 ms |
| Raw crystal (set every hour) | +15.386 ms |
| This machine's own clock | -1.407 ms |
| Heart time lost to host stalls | +494820.469 ms |
| Atomic round trip | +4.188 ms |