@brade I’ve been running this on my Surface Pro 3 via a VirtualBox VM and only just discovered that my Bluetooth and this plugin seem to be the root cause of my CPU load issues. My HA install was running really slow with constant load between 50-90% CPU. After disabling almost everything the last thing I tried was removing my bluetooth device (virtually) and this plugin and BINGO - CPU dropped back down to 13%.
I’m not sure if there’s a bug? The BLE devices I was using was these (6 of them though only about 3 were in range) plus also had the Xiaomi night lights (v2 with BLE and motion sensors): Xiaomi Mijia BLE Temperature and Humidity Sensor - Home Assistant.
But hey just searching Google I found the above link and looks like there is native support without needing this Passive BLE Monitor integration? I need to try it out!