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From: John Wiegley <johnw@newartisans.com>
To: emacs-devel@gnu.org
Subject: Re: Inefficiency in Bgotoifnil byte-code instruction
Date: Thu, 28 Jun 2012 16:24:55 -0500	[thread overview]
Message-ID: <m2mx3ni0yg.fsf@newartisans.com> (raw)
In-Reply-To: <E1SkERI-00006Q-0C@fencepost.gnu.org> (Richard Stallman's message of "Thu, 28 Jun 2012 09:07:16 -0400")

>>>>> Richard Stallman <rms@gnu.org> writes:

>     My recommendation is that we split these into two ops: Bgotoifnil and
>     Bgotoifnonnil, which use only FETCH and a positive/negative offset from the
>     current pc, and Bgotoifnil2 and Bgotoifnonnil2 which use the old logic
>     (FETCH2, and an absolute offset from the start of the bytecode stream).

> This incompatibility might be more trouble than it is worth.

I hadn't considered that, and I think you're exactly right.

John



      reply	other threads:[~2012-06-28 21:24 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-28  3:01 Inefficiency in Bgotoifnil byte-code instruction John Wiegley
2012-06-28  4:38 ` Stefan Monnier
2012-06-29 16:39   ` Tom Tromey
2012-06-30  4:07     ` Stefan Monnier
2012-07-02 19:17       ` Tom Tromey
2012-07-03 13:19         ` Stefan Monnier
2012-07-03 14:45           ` Tom Tromey
2012-07-03 16:58             ` Stefan Monnier
2012-07-03 17:22               ` Tom Tromey
2012-07-03 17:53                 ` Aurélien Aptel
2012-07-03 19:24                   ` Tom Tromey
2012-07-03 23:02                 ` Stefan Monnier
2012-07-06 20:22                   ` Tom Tromey
2012-07-06 21:39                     ` Stefan Monnier
2012-07-09 19:12                   ` Tom Tromey
2012-07-10 10:31                     ` Stefan Monnier
2012-07-03 19:52             ` John Wiegley
2012-07-06 20:27           ` Tom Tromey
2012-07-02  3:51     ` John Wiegley
2012-07-02 14:08       ` Tom Tromey
2012-06-28  4:41 ` Stefan Monnier
2012-06-28 13:07 ` Richard Stallman
2012-06-28 21:24   ` John Wiegley [this message]

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