Optimize for 'double'

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Yingke 2012-6-11

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Dear All

I am wondering is there any special optimization in MATLAB for double arrays? I have the feeling that UINT is a little slower than double array, although the reduced memory space is considerable. I need to make a trade off between speed and space now.

Thanks!

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Yingke 2012-6-11

For example: the range of A is 0-2^32. The operation on A is essential, + - * /.

Shall I choose Uint32 or DOUBLE?

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Answer 1

Walter Roberson 2012-6-11

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These days it is common for CPUs to have faster floating point instructions than integer instructions.

For larger double arrays, I believe the optimized LAPACK or similar libraries may be invoked; I am not sure if those are invoked for other data types.