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6815 Discussions

matrix*vector performance

nikolay_bit
Beginner
‎10-26-2006 03:02 PM
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I use ippmMul_mva_32f function to multiply 3x3 matrix by array of vectors, - rotation of 3D points. However it turned out, that this function works slower then old simpleclassic code with nine multiplies.

Forarray with 35000 elements, old code took 700usecs, but ippmMul_mva_32f takes about 1000 usecs! May be I do something wrong? I can postsample code, if necessary.

Thanks.

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Vladimir_Dudnik
Employee
‎11-06-2006 02:36 PM
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Could you please also be so kind to specify what version of IPP do you use and on which platform do you run your code? Piece of code of course will simplify us investigation of that issue.

Regards,
Vladimir

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