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Posted to issues@commons.apache.org by "Konstantin Berlin (JIRA)" <ji...@apache.org> on 2012/11/16 18:10:12 UTC
[jira] [Updated] (MATH-901) FastMath.sin is slow
[ 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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