== sanity test 421d: rmfid en masse ====================== 16:46:15 (1709070375)
 - open/close 1228 (time 1709070387.67 total 10.01 last 122.73)
 - open/close 2307 (time 1709070397.68 total 20.01 last 107.84)
 - open/close 3283 (time 1709070407.68 total 30.01 last 97.60)
total: 4097 open/close in 36.19 seconds: 113.20 ops/second