== sanity test 421d: rmfid en masse ====================== 10:48:20 (1753368500)
 - open/close 1680 (time 1753368512.73 total 10.00 last 167.93)
 - open/close 3211 (time 1753368522.73 total 20.01 last 153.06)
total: 4097 open/close in 25.46 seconds: 160.92 ops/second