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關(guān)于Matlab的計(jì)時(shí) 已有7人參與
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在matlab里面怎么計(jì)時(shí)比較正確?發(fā)現(xiàn)tic/toc和cputime的計(jì)時(shí)差別比較大 matlab的手冊(cè)說得也比較模糊 Using tic and toc Versus the cputime Function Although it is possible to measure performance using the cputime function, it is recommended that you use the tic and toc functions for this purpose exclusively. It has been the general rule for CPU-intensive calculations run on Microsoft Windows machines that the elapsed time using cputime and the elapsed time using tic and toc are close in value, ignoring any first time costs. There are cases however that show a significant difference between these two methods. For example, in the case of a Pentium 4 with hyperthreading running Windows, there can be a significant difference between the values returned by cputime versus tic and toc. |
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