Intel® Integrated Performance Primitives
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IPP very slow compared to OpenCV

egrayver
Beginner
‎05-23-2007 05:58 PM
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I am trying to speed some code that uses the Open ComputerVision library. The function in question is:

cvCalcCovarMatrix

The identical (functionally) function in IPP is

ippsAccCovarianceMatrix_32f64f_D2

I just benchmarked the two, and the IPP version is 40x slower. This is for the same data, running in the same function, one after another. What could be going on?

I am running on a P4-3.8GHz, Win XP Pro.
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Vladimir_Dudnik
Employee
‎06-04-2007 11:37 AM
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something really strange, could you please provide more info re your testing conditions, size of data and so on. Or you probably can share your test case with us, to help us understand that?

Regards,
Vladimir

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Intel_C_Intel
Employee
‎06-07-2007 01:51 AM
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I measured and got IPP slow down about 3 times

This issue is corrected in IPP 5.3

Alexander

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