This bug still exists. It was reported a version and 4 years ago. It's a performance killer and makes the application almost unusable.

https://www.sencha.com/forum/showthr...=1#post1134460


I have a function which contains treestore.filterBy function that is called thousands of times. My custom function isn't called that many times. It gets right into the treestore.filterBy function. How?