IRB console consumes a lot of resources after updating to 2016.1 on OS X El Capitan 10.11.4

 After updating to RubyMine 2016.1, the IRB console tool will consume a lot of resources. I have not experienced this issue with version 8. I have since downgraded back to 8 and am no longer experiencing the issue.

To reproduce:

1. launch RubyMine 2016.1
2. navigate to Tools -> IRB Console
3. i use it primarily for watir, so after typing require 'watir-webdriver', an excessive amount of resources will be consumed by RubyMine

Anyone else encountering this? Am I missing something?

Thanks!