IntelliJ IDEA 12.1 eat 100% CPU from time to time
cpu-usage, intellij-idea
Solution
Chances are the external build mentionned by @CrazyCoder compiles your project automatically when you make changes to your source files. If it annoys you too much, you can disable automatic compilation in `File > Settings > Compiler > Make project automatically` (uncheck the box).
Problem
I've just updated my IntelliJ IDEA to latest 12.1 version and I found my laptop CPU usage become 100% from time to time, monitor the progress manager I found IDEA fork an new Java process regularly and it runs for several tens of seconds and shutdown. During that time the CPU usage is close to 100%: