Spatial tree - Request performance improvement during visibility on/off

[muthubentley]

[Request from User] Select multiple elements and turn visibility on/off – Elements visibility is turned on/off one by one with a little bit of delay. If possible please turn them on/off at once. In case of a large tree even if the visibility of one node is turned on/off performance is bad. Visibility is reflected in viewport earlier but it takes time to reflect in the tree. Please refer to the video here: https://bentley.sharepoint.com/:v:/r/sites/Fukui-BentleyCollaboration/Shared%20Documents/iTwin%20-%20CIMPHONY%20Plus/SampleData/TreePerformance/SpatialTreeVisibilityPerformance.mp4?csf=1&web=1&e=2RhZZh