Why is IntelliJ 13 IDEA so slow after upgrading from version 12?

Question

While using IntelliJ 13 ultimate edition for a week, it just seems really slow.

First of all, the whole IDE stops for a second or so every once in a while. The Java

Answer 1

My particular case (Mac) was I edited the info.plist to use java 1.7* (for whatever reason), and it ran like an absolute dog.

Changed back to 1.6* and installed java 1.6, and it was fast.