Complex +/ . * does not use AVX yet. Henry Rich
On 3/12/2017 7:47 PM, Don Guinn wrote:
Tried a 1000 by 1000 complex matrix and compared inverting it and then the matrix product of it and its inverse on J805 and J806 avx. Saw less than a 10% improvement with avx. Then tried a real 5000 by 5000 matrix and saw a speedup of 1.6 on the inverse and 2.2 on the multiply. Ran it several times back and forth to minimize outside interference. Probably the complex numbers aren't well vectorized yet. My laptop is kind of old. 8G memory and Intel(R) Core(TM) i7-3619QM CPU @ 2.30GHz running Windows 10. Had upgraded from the original Windows 7 and it doesn't run really well, but maybe wait a while before getting a new one to let the latest avx mature some. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
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