Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -418240.557 ms |
| Heart (set every hour) | -11346.602 ms |
| Raw crystal (set once) | +2103.388 ms |
| Raw crystal (set every hour) | +28.289 ms |
| This machine's own clock | -1.334 ms |
| Heart time lost to host stalls | +420343.034 ms |
| Atomic round trip | +5.573 ms |