[jira] [Updated] (MATH-740) Some "FastMath" functions are slow

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[jira] [Updated] (MATH-740) Some "FastMath" functions are slow

Jerome Wolff (Jira)

     [ https://issues.apache.org/jira/browse/MATH-740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe updated MATH-740:
-------------------------------

    Fix Version/s:     (was: 3.2)
                   4.0
   

> 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: 4.0
>
>         Attachments: jafamatests.zip
>
>
> 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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