According to my MacBook and top, IntelliJ is taking somewhere between 200-300% CPU time. That's interesting on a duo core Macbook. I've noticed this usually happens when editing Groovy script files. This is quite unworkable, it feels like my whole machine is melting away. Not good for the life expectency of the machine. I've got hardly any plugins installed, except for SoapUI and Atlassian Connector.