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From: | anonymous |
Subject: | [Octave-bug-tracker] [bug #48736] Multiplication is thrice as fast as division |
Date: | Wed, 10 Aug 2016 12:13:09 +0000 (UTC) |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0 |
Follow-up Comment #2, bug #48736 (project octave): The computational complexity of the division operator is higher than the multiplication operator. See the link https://en.wikipedia.org/wiki/Computational_complexity_of_mathematical_operations Further the link https://gmplib.org/~tege/x86-timing.pdf shows that there is about a factor of 5 difference in the number of cycles for scalr division and multiplication. Ok, perhaps Octave should be expanding x /= n as x *= 1/n -varbatim- but I suspect that this would not be as accurate. What as the matlab times in this case ? D. _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?48736> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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