I realize this is not the most helpful title. I'm a big fan of intellij and unfortunately for me this report comes along with a couple recent changes:
1. I recently replaced my mac and with it moved up to a Oct 2016 Touch Macbook Pro with High Sierra.
2. My early interpretation was that intellij was slow (should be much faster on the new machine) so I upgraded to 2017.3.1.
Several times per day it freezes for 30+ seconds. I find it consuming 300% CPU. I am forced to kill and restart it. I typically loose the most recent work I've done.
While I've been a huge intellij fan over the last 10 years this VERY painful... let me know what I can do to help diagnose.
IntelliJ IDEA 2017.3.1 (Ultimate Edition)
Build #IU-173.3942.27, built on December 11, 2017
Subscription is active until February 23, 2018
JRE: 1.8.0_152-release-1024-b8 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.12.6