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From: Bart Schaefer <schaefer@brasslantern.com>
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Date: Sun, 25 Oct 2015 17:49:38 -0700
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Comments: In reply to Sebastian Gniazdowski <sgniazdowski@gmail.com>
        "Re: Slowdown around 5.0.5-dev-0" (Oct 25,  9:56pm)
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Subject: Re: Slowdown around 5.0.5-dev-0
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On Oct 25,  9:56pm, Sebastian Gniazdowski wrote:
}
} Turns out that's not it

Hm.  If it shows up between 5.0.7 and 5.0.8 and can't be explained by
different compilers or different compiler flags, then other culprits
might be:

 *  36ec763d - 33976: fix overlapping strcpy()
 *  one of the several commits that added queue_signals()

That mmap change was the only thing in mem.c from 5.0.7 -> 5.0.8.