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authorBruno Randolf <br1@einfach.org>2010-12-02 19:50:37 +0900
committerJohn W. Linville <linville@tuxdriver.com>2010-12-06 15:58:43 -0500
commitaf5568843594fb71055debe36e521fa8072fcecc (patch)
tree4f35966cb4e1018b05c87d7a10c337d888949e22 /lib/halfmd4.c
parent5dcc03fe29537edd7819f5b121bf3d779693f37b (diff)
lib: Improve EWMA efficiency by using bitshifts
Using bitshifts instead of division and multiplication should improve performance. That requires weight and factor to be powers of two, but i think this is something we can live with. Thanks to Peter Zijlstra for the improved formula! Signed-off-by: Bruno Randolf <br1@einfach.org> -- v2: use log2.h functions Signed-off-by: John W. Linville <linville@tuxdriver.com>
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