Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -533955.912 ms |
| Heart (set every hour) | -5103.068 ms |
| Raw crystal (set once) | +2679.489 ms |
| Raw crystal (set every hour) | +27.256 ms |
| This machine's own clock | -0.320 ms |
| Heart time lost to host stalls | +536634.040 ms |
| Atomic round trip | +5.690 ms |