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Date: Fri, 16 Nov 2012 17:10:12 +0000 (UTC)
From: "Konstantin Berlin (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
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Subject: [jira] [Updated] (MATH-901) FastMath.sin is slow
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     [ https://issues.apache.org/jira/browse/MATH-901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Konstantin Berlin updated MATH-901:
-----------------------------------

    Attachment: SineTest.java
                FastMath.java

The described FastMath, with some functions removed for simplicity, and my test file.
                
> FastMath.sin is slow
> --------------------
>
>                 Key: MATH-901
>                 URL: https://issues.apache.org/jira/browse/MATH-901
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.1
>         Environment: Mac OS 10.8.2, Java 7
>            Reporter: Konstantin Berlin
>         Attachments: FastMath.java, SineTest.java
>
>
> The FastMath.sin (maybe other functions too) are not nearly as fast as some other libraries that can be found on the internet.
> The *much* faster code can be found here http://www.oliford.co.uk/phys/code/AlgorithmRepository/src/jafama/.
> Max Absolute Error Apache vs JDK: 1.1102230246251565E-16
> Max Absolute Error Alternative vs JDK: 5.551115123125783E-16
> JDK Time: 0.698
> Apache Time: 0.491
> Alternative Time: 0.18
> I will add my test code as soon as I figure out how.

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