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https://issues.apache.org/jira/browse/MATH-901?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498986#comment-13498986
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Konstantin Berlin commented on MATH-901:
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I could be wrong, but my basic understanding is that the code is protected, not
the algorithm. As long as you figure out the algorithm and blindly implement
your own version you are not violating LGPL. To protect the algorithm I would
image they would need to apply for a patent.
> FastMath.sin is slow
> --------------------
>
> Key: MATH-901
> URL: https://issues.apache.org/jira/browse/MATH-901
> Project: Commons Math
> Issue Type: Sub-task
> Affects Versions: 3.1
> Environment: Mac OS 10.8.2, Java 7
> Reporter: Konstantin Berlin
> Attachments: 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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