After upgrading production system from UIM 9.2.0 to DX IM 20.3, Operator Console is very slow while loading groups, especially those with thousands of devices, much slower than UMP:
Performance Optimization
Release : 20.3
Component : UIM - OPERATOR CONSOLE
The performance optimization for the Groups view in Operator Console is being addressed. The enhanced group view in Operator Console will be available to the customers through Operator Console 20.3.3
Expected ETA for Operator Console 20.3.3 is last week of Feb 2021