Increasing Java's BigInteger performance

Question

How to increase performance of Java\'s Big Integer?

For example, this factorial program:

import java.math.*;
class Fac {
  public static void main(String         


        

Answer 1

Other answers are related to tune the performance using code.

If you are using java version less than 1.8.0_151, you can tune big integer performance by using the following command options:

-XX:+UseMontgomerySquareIntrinsic
-XX:+UseMontgomeryMultiplyIntrinsic
-XX:+UseSquareToLenIntrinsic
-XX:+UseMultiplyToLenIntrinsic

After 1.8.0_151, these options are turned on by default.