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From "Alexey Petrenko (JIRA)" <j...@apache.org>
Subject [jira] Closed: (HARMONY-1981) [classlib][java.math] optimization of BigInteger.modPow and BigInteger.pow
Date Wed, 08 Nov 2006 06:30:57 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-1981?page=all ]

Alexey Petrenko closed HARMONY-1981.
------------------------------------


Daniel, thanks for your great job!

> [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
>         Assigned To: Alexey Petrenko
>            Priority: Minor
>         Attachments: pow_modPow.diff
>
>
> 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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