Each clock against atomic time (time.cloudflare.com), sampled every 30 s.
| Heart (set once) | -324371.229 ms |
| Heart (set every hour) | -11215.399 ms |
| Raw crystal (set once) | +718.276 ms |
| Raw crystal (set every hour) | +46.188 ms |
| This machine's own clock | +0.245 ms |
| Heart time lost to host stalls | +325089.528 ms |
| Atomic round trip | +6.380 ms |