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Re: indirect threading for bytecode interpreter

From: David Kastrup
Subject: Re: indirect threading for bytecode interpreter
Date: Mon, 21 Sep 2009 15:21:41 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

>> I've profiled (using oprofile) Emacs running this a few times;
>> typical results show mark_object at 10-12% of runtime.  It is
>> probably pretty easy to reproduce this with a variety of elisp
>> programs.
> So no matter how hard we try, we won't gain more than about 10%
> speed-up trying to optimize the GC.  Doesn't sound like a great
> motivator.

The 10% occur in bursts of unresponsiveness.  If such a burst is halved
in size, the total runtime improvement will not be impressive, but the
responsiveness gets quite better.

David Kastrup

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