Intel® Integrated Performance Primitives
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In-place FFTs and VTune

dave4
Beginner
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I am currently using in-place FFTs but in VTune it appears that the in-place functions call the out-of-place functions. Consequently, for large sizes the perftool indicates that using in-place FFTs is more efficient. I am using sizes 512K-4M. How can one be more efficient than the other if one calls the other??

Dave
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Vladimir_Dudnik
Employee
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Hi Dave,

the magic is in less memory load forin-place operation.

Regards,
Vladimir

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