Webstorm eats all of the memory and freezing periodically. It takes some hours even if I give more than 7Gbytes in the settings. I use it for angular development. BTW I realized the same issue with the AppCode 1-2 year ago on a different machine with iOS development. I thought it is a Java version issue, therefore i tried with other Java installs. I have a powerfull machine but sometimes the WebStorm also eats all of the CPUs even if i don't do anything.
This is the current version, but i also tried with the previous one:
Build #WS-183.4588.66, built on December 5, 2018
Licensed to WebStorm Evaluator
Expiration date: December 28, 2018
JRE: 1.8.0_131-b11 x86_64
JVM: Java HotSpot(TM) 64-Bit Server VM by Oracle Corporation