[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: indirect threading for bytecode interpreter

From: Stefan Monnier
Subject: Re: indirect threading for bytecode interpreter
Date: Mon, 21 Sep 2009 10:46:09 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

>>> 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.

That is true.  To help solve this, we should aim to move towards
a concurrent GC (i.e. a GC that's actually likely to be slower, but
won't cause unresponsiveness).


reply via email to

[Prev in Thread] Current Thread [Next in Thread]