Each clock against atomic time (time.google.com), sampled every 30 s.
| Heart (set once) | -9835093.601 ms |
| Heart (set every hour) | -19024.301 ms |
| Raw crystal (set once) | +12544.421 ms |
| Raw crystal (set every hour) | +31.087 ms |
| This machine's own clock | +2.053 ms |
| Heart time lost to host stalls | +9847620.348 ms |
| Atomic round trip | +21.025 ms |