XoRoShiRo128PlusRandom is a Faster Random Class that is many times faster than standard Java Random. It also features better random distribution and the ability to be split and retain the exact same noise output like Splitable random.
http://dsiutils.di.unimi.it/docs/it/unimi/dsi/util/XoRoShiRo128PlusRandom.html
FastMath is a drop in replacement for the native Java math class with improved performance and fall backs to the native Java math class if necessary.
https://commons.apache.org/proper/commons-math/javadocs/api-3.3/org/apache/commons/math3/util/FastMath.html
This requires further testing and might cause chunk borders due the FastMath giving slightly different results than the native Java math class.
I also added .idea/Terra.iml to the .gitignore