I filed IDEA-14683 "Optimize Editor Syntax/Inspection parase for multi-cores, limit autoreparse delay to only 1 out of n cores." around 2 years ago when multi-core desktops were becoming mainstream. Since this is still a major issue for me that limits IDEA fully leveraging my quad-core workstation, I want to bring it up again. Maybe now more people are developing with pleasure on multi-core workstations, and can comment. [http://jetbrains.net/tracker/issue/IDEA-14683]
Re-reading my original issue, I don't think I made it clear that the main problem is that IDEA pauses the syntax/inspections parse on key presses when the file is not even being modified. Clicking on the editor pane with your mouse also pauses the syntax/inspection parse. However, just moving your mouse over the editor panel (no clicking) does *not* pause the parse.
When I am browsing files, e.g. stepping through the usages in a file, or just studying some code, what happens is the syntax/inspections parse is getting paused if I press any key. After the auto-reparse delay, it will restart the syntax/inspections parse, but if you type another key, it pauses again. Note that I am not editing the file(s), just navigating it with the keyboard, my cpu is at ~ 0% on 8 cores (4 cores X2 with Intel HT turned on). I have to stop pressing a key if I want the syntax/inspection parse to complete.
The desired behavior is that if a file is not being modified, then the syntax/inspection parse should continue for the file in the Editor pane using n cores - 1.
Please, please jetbrains, tell me you can do this.
Also, I hope all Jetbrains developers are working on quad-core (or those new six core) workstations. If they have the speed, they will put it to good use. PS. If you want IDEA to really fly , also use a SSD drive like Intel X25-E Extreme SSD.