From: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: User-reserved element in byte code vectors
Date: 28 Apr 2004 13:12:50 -0400 [thread overview]
Message-ID: <m1wu40dobc.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <85ekq8dp02.fsf@junk.nocrew.org>
>> I'd argue that the closure's enviornment should be put as the first
>> element in the constants-vector rather than in a separate slot in
>> the byte code object: it makes closure construction slower and more
>> clostly, but it makes the function call faster (it's just a normal
>> function call and you can access the closure's vars directly from
>> the byte code without explicitly passing them as an extra argument).
> Yes, that would be nice. What I do right now is actually conceptually
> like
> (defun make-closure (fn env)
> (byte-compile
> `(lambda (&rest args)
> (let ((env ,env))
> (apply ,fn args)))))
> (but more optimized) which makes the environment end up in the
> constants vector.
Right, but in the constants-vector if the wrapper function used for the
closure, whereas I was thinking of removing the indirection and do
something more like
(defun make-closure (env args bytes csts &rest rest)
(apply 'make-byte-code args bytes (vconcat (vector env) csts) rest))
> I guess a very extensible scheme would be to create a new function
> allocate-byte-code-element which returnes an index to a byte code
> vector element which can be used for any purpose the caller likes, but
> then, is the complexity (though small) worth it?
I think it's way overkill.
Stefan
next prev parent reply other threads:[~2004-04-28 17:12 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1BH4Nx-000730-Dq@fencepost.gnu.org>
[not found] ` <85k7036eqr.fsf@junk.nocrew.org>
[not found] ` <E1BI6nw-0005F4-Hl@fencepost.gnu.org>
[not found] ` <85smepfzqo.fsf@junk.nocrew.org>
[not found] ` <E1BIm46-0001Ha-5A@fencepost.gnu.org>
2004-04-28 10:43 ` User-reserved element in byte code vectors (was: Emacs Common Lisp) Lars Brinkhoff
2004-04-28 13:48 ` Stefan Monnier
2004-04-28 15:08 ` User-reserved element in byte code vectors Lars Brinkhoff
2004-04-28 15:38 ` Stefan Monnier
2004-04-28 16:51 ` Lars Brinkhoff
2004-04-28 17:12 ` Stefan Monnier [this message]
2004-05-02 7:59 ` Lars Brinkhoff
2004-05-02 9:43 ` Miles Bader
2004-05-02 16:02 ` Lars Brinkhoff
2004-05-03 14:03 ` Richard Stallman
2004-05-03 19:57 ` Miles Bader
2004-05-05 5:23 ` Lars Brinkhoff
2004-05-05 20:21 ` Richard Stallman
2004-05-06 3:55 ` Miles Bader
2004-05-06 4:56 ` Miles Bader
2004-05-06 11:48 ` Richard Stallman
2004-05-14 17:53 ` Miles Bader
2004-05-14 18:27 ` Stefan Monnier
2004-05-14 19:50 ` Lars Brinkhoff
2004-05-14 22:03 ` Miles Bader
2004-05-14 22:14 ` Stefan Monnier
2004-05-15 18:34 ` Richard Stallman
2004-05-15 23:10 ` Miles Bader
2004-05-17 11:04 ` Richard Stallman
2004-05-17 11:28 ` Lars Brinkhoff
2004-05-17 16:30 ` Stefan Monnier
2004-05-17 22:06 ` Miles Bader
2004-05-17 22:33 ` David Kastrup
2004-05-18 1:29 ` Miles Bader
2004-05-18 13:17 ` Stefan Monnier
2004-05-18 23:45 ` Miles Bader
2004-05-19 6:28 ` David Kastrup
2004-05-19 6:37 ` Miles Bader
2004-05-19 19:00 ` Richard Stallman
2004-05-19 22:32 ` Function vectors: +funvec-20030520-0-c.patch Miles Bader
2004-05-19 7:34 ` User-reserved element in byte code vectors Kim F. Storm
2004-05-19 13:45 ` Richard Stallman
2004-05-19 14:28 ` Miles Bader
2004-05-19 15:19 ` Stefan Monnier
2004-05-20 0:31 ` Miles Bader
2004-05-20 13:17 ` Richard Stallman
2004-05-21 1:28 ` Miles Bader
2004-05-22 7:31 ` Richard Stallman
2004-05-22 9:37 ` Miles Bader
2004-05-18 14:53 ` Richard Stallman
2004-05-18 17:34 ` Miles Bader
2004-05-18 14:53 ` Richard Stallman
2004-05-16 23:53 ` Stefan Monnier
[not found] ` <E1BP3ym-0007oy-F7@fencepost.gnu.org>
[not found] ` <20040515231754.GB20052@fencepost>
2004-05-16 4:02 ` Function vectors: +funvec-20030516-0-c.patch Miles Bader
2004-05-16 12:28 ` Function vectors: +funvec-20030516-1-c.patch Miles Bader
2004-05-16 23:58 ` Function vectors: +funvec-20030516-0-c.patch Stefan Monnier
2004-05-17 0:03 ` Miles Bader
2004-05-17 0:14 ` Stefan Monnier
2004-05-17 0:30 ` Miles Bader
2004-05-17 16:09 ` Stefan Monnier
2004-05-17 22:21 ` Miles Bader
2004-05-18 13:30 ` Stefan Monnier
2004-05-17 11:04 ` Richard Stallman
2004-05-17 11:04 ` Richard Stallman
2004-05-17 22:54 ` Miles Bader
2004-05-18 14:54 ` Richard Stallman
2004-05-18 6:04 ` Function vectors: +funvec-20030518-0-c.patch Miles Bader
2004-05-06 6:17 ` User-reserved element in byte code vectors Lars Brinkhoff
2004-05-06 14:24 ` Stefan Monnier
2004-05-06 20:39 ` Miles Bader
2004-05-02 16:37 ` Stefan Monnier
2004-05-02 18:59 ` Lars Brinkhoff
2004-05-02 19:21 ` Stefan Monnier
2004-05-02 19:27 ` Lars Brinkhoff
2004-05-02 19:54 ` Stefan Monnier
2004-05-02 20:28 ` Lars Brinkhoff
2004-05-02 21:07 ` Stefan Monnier
2004-05-03 6:08 ` Lars Brinkhoff
2004-05-02 19:52 ` Richard Stallman
2004-04-28 15:38 ` User-reserved element in byte code vectors (was: Emacs Common Lisp) Miles Bader
2004-05-01 5:30 ` Lars Brinkhoff
2004-05-01 23:58 ` Miles Bader
2004-05-01 7:01 ` get-internal-run-time Lars Brinkhoff
2004-05-01 18:53 ` get-internal-run-time Lars Brinkhoff
2004-05-02 14:44 ` get-internal-run-time Eli Zaretskii
2004-05-02 15:45 ` get-internal-run-time Lars Brinkhoff
2004-05-02 18:41 ` get-internal-run-time Lars Brinkhoff
2004-05-03 0:10 ` get-internal-run-time Kevin Ryde
2004-05-03 5:38 ` get-internal-run-time Lars Brinkhoff
2004-05-03 14:03 ` get-internal-run-time Richard Stallman
2004-10-28 16:30 ` get-internal-run-time Lars Brinkhoff
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