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Re: indirect threading for bytecode interpreter

From: joakim
Subject: Re: indirect threading for bytecode interpreter
Date: Mon, 21 Sep 2009 15:47:15 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

David Kastrup <address@hidden> writes:

> 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.

Unresponsiveness is the main cause of intestinal agony, so seems quite
worthwile to me.

Joakim Verona

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