From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Dmitry Antipov <dmantipov@yandex.ru>
Cc: Emacs development discussions <emacs-devel@gnu.org>
Subject: Re: [RFC] temporary Lisp_Strings
Date: Tue, 02 Sep 2014 10:00:15 -0400 [thread overview]
Message-ID: <jwvppfeqg8e.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <5405BE5D.1090003@yandex.ru> (Dmitry Antipov's message of "Tue, 02 Sep 2014 16:55:57 +0400")
> I'm thinking about temporary Lisp_Strings on C stack (allocated with alloca).
> Simple implementation (with no check whether it fits on stack) and a few use
> cases attached. Among others, the question is: is there a way to make sure
> that an address returned by alloca fits in Lisp_Object?
Have you made some preliminary measurements (on microbenchmarks) to try
and see how much speed up we might gain? Given the cost of strlen and
parse_str_as_multibyte, I'd expect that the best-case benefit might turn
out to be rather small.
Stefan
next prev parent reply other threads:[~2014-09-02 14:00 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-02 12:55 [RFC] temporary Lisp_Strings Dmitry Antipov
2014-09-02 13:21 ` Andreas Schwab
2014-09-02 13:47 ` Dmitry Antipov
2014-09-02 14:14 ` Andreas Schwab
2014-09-02 15:00 ` Eli Zaretskii
2014-09-02 14:00 ` Stefan Monnier [this message]
2014-09-02 15:13 ` Dmitry Antipov
2014-09-02 17:32 ` Stefan Monnier
2014-09-03 10:23 ` Benchmarking temporary Lisp objects [Was: Re: [RFC] temporary Lisp_Strings] Dmitry Antipov
2014-09-03 13:14 ` Stefan Monnier
2014-09-03 14:39 ` Paul Eggert
2014-09-03 15:39 ` Dmitry Antipov
2014-09-03 16:42 ` Paul Eggert
2014-09-03 17:47 ` Stefan Monnier
2014-09-03 18:00 ` Paul Eggert
2014-09-04 4:59 ` Dmitry Antipov
2014-09-04 5:13 ` Paul Eggert
2014-09-04 5:51 ` Dmitry Antipov
2014-09-04 6:45 ` Paul Eggert
2014-09-04 13:11 ` Stefan Monnier
2014-09-04 13:37 ` Dmitry Antipov
2014-09-04 14:46 ` Dmitry Antipov
2014-09-04 16:03 ` Paul Eggert
2014-09-05 4:00 ` Dmitry Antipov
2014-09-05 4:24 ` Stefan Monnier
2014-09-05 9:28 ` Dmitry Antipov
2014-09-05 7:15 ` Paul Eggert
2014-09-05 9:16 ` Dmitry Antipov
2014-09-05 14:35 ` Paul Eggert
2014-09-05 15:35 ` Stefan Monnier
2014-09-08 10:33 ` Dmitry Antipov
2014-09-08 12:01 ` Dmitry Antipov
2014-09-08 13:30 ` Stefan Monnier
2014-09-08 12:44 ` Stefan Monnier
2014-09-08 13:30 ` Stefan Monnier
2014-09-02 14:37 ` [RFC] temporary Lisp_Strings Paul Eggert
2014-09-02 15:24 ` Dmitry Antipov
2014-09-02 15:28 ` Dmitry Antipov
-- strict thread matches above, loose matches on Subject: below --
2014-09-02 12:56 Dmitry Antipov
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