I am on the 30day trial for WebStorm and so far this is the poorest experience I have had of any of the jetbrains IDEs I have used. I appear to be having the same problem that was reported on version 9 of the product. I have some background indexing process sucking up CPU and Memory. The other thread mentioned something about Gulp. I do have a gulp file at part of this project and am looking at the Gulp task as i navigate that code... I can comprehend no reason why any of this would be bringing this product to its knees. This is a bug.