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https://issues.apache.org/jira/browse/MATH-740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13428700#comment-13428700
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Gilles commented on MATH-740:
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Revision 1369506 contains a few changes that improve the performance of "log"
by a small amount.
> Some "FastMath" functions are slow
> ----------------------------------
>
> Key: MATH-740
> URL: https://issues.apache.org/jira/browse/MATH-740
> Project: Commons Math
> Issue Type: Wish
> Reporter: Gilles
> Priority: Minor
> Fix For: 3.1
>
>
> From the two benchmarks we currently have in "FastMathTestPerfomance", we
> have that the following functions are much slower in "FastMath" than in
> either "Math" or "StrictMath" (the performance *loss*, for each of the
> benchmarks, is given in parentheses):
> * log10 (46%, 36%)
> * log1p (68%, 112%)
> * tan (11%, 61%)
> * atan (26%, 125%)
> * atan2 (44%, 40%)
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