Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -6185619.458 ms |
| Heart (set every hour) | -18705.360 ms |
| Raw crystal (set once) | +10042.665 ms |
| Raw crystal (set every hour) | +21.288 ms |
| This machine's own clock | -2.987 ms |
| Heart time lost to host stalls | +6195657.152 ms |
| Atomic round trip | +9.305 ms |