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I have large arrays that I need to do FFT transform many times. The Vtune shows the memset as the hottest spot. I used memset to zero init all array values before I assign. Not all matrix elements got assigned values. It is more like a sparse matrix. If I don't use memset and use for loop instead, the program runs even slower. How do I init the array more efficiently? Thanks.

Zhu_W_Intel

Employee

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01-05-2010
12:07 PM

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BKM to init matrix for FFT transform

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