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From "Daniel Fridlender (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1981) [classlib][java.math] optimization of BigInteger.modPow and BigInteger.pow
Date Thu, 26 Oct 2006 14:49:16 GMT
[classlib][java.math] optimization of BigInteger.modPow and BigInteger.pow

                 Key: HARMONY-1981
                 URL: http://issues.apache.org/jira/browse/HARMONY-1981
             Project: Harmony
          Issue Type: Improvement
            Reporter: Daniel Fridlender
            Priority: Minor

The method modPow is important for cryptographic applications.  We optimized it by

+ using sliding windows instead of the simpleminded square-and-multiply technique
+ optimizing Montogomery multiplication when computing squares

We also optimized pow with a more efficient computation of squares.

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