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Profiler performance improvement

From: Rik
Subject: Profiler performance improvement
Date: Thu, 13 Nov 2014 00:39:12 -0800



I committed a patch from Julien Bect which removes most of the overhead of
profiling when it is not enabled

There was a roughly 200% slowdown from 3.4.X to the current development
branch.  This patch recovers about 60% of that.  And if I use
--disable-atomic-refcounts I get another 100% back.  This still leaves
about 40% of miscellaneous cruft.


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