Weird change in CPU usage makes RubyMine almost unusable [Graph included]

I have been using RubyMine for about 2 months now and been experiencing performance issues ever since. I thought it was because of the buggy debugger, then because of swapping.. Nay

So I realized that for 5 - 10 minutes it works fine, until RubyMine (or Ubuntu?) decides to use alternatively one core at 100 % and the other not so much. It sometimes goes back to normal but tipically stays the same, makin it really unpleasant to use.

So here you see the change around 30 sec.

What do you think? clear change in cpu usage at 30 secs

Solution

Providing a CPU snapshot for RubyMine may help to identify the problem if it's RubyMine process eating your resources.