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Rob Tompkins commented on MATH-1385: ------------------------------------ The issue at hand here is that we have no upper limits on the size of the array returned by {{TransformUtils.createComplexArray}}, and this causes the potential for memory profile limitations. I wonder if we could somehow perform the transform in portions as opposed to doing a complete copy of the input data here: https://github.com/apache/commons-math/blob/MATH_3_6_1/src/main/java/org/apache/commons/math3/transform/FastFourierTransformer.java#L370-L372 or minimally not make a second copy of the data in the {{TransformUtils}}. > java.lang.OutOfMemoryError: GC overhead limit exceeded > ------------------------------------------------------ > > Key: MATH-1385 > URL: https://issues.apache.org/jira/browse/MATH-1385 > Project: Commons Math > Issue Type: Bug > Environment: Windows 10, jdk 8, Netbeans 8.1 > Reporter: Pasquale Calorigero > Fix For: 4.0 > > > I'm writing code for shorttime fourier transform , but jvm return this error > Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit > exceeded > at > org.apache.commons.math3.transform.TransformUtils.createComplexArray(TransformUtils.java:138) > at > org.apache.commons.math3.transform.FastFourierTransformer.transform(FastFourierTransformer.java:376) > Seems that your code everytime that compute fft , causes the execution of gc. -- This message was sent by Atlassian JIRA (v6.3.15#6346)