From: Dmitry Antipov <antipov@mvista.com>
To: emacs-devel@gnu.org
Cc: Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Re: immediate strings #2
Date: Tue, 29 Nov 2011 09:29:51 +0400 [thread overview]
Message-ID: <4ED46DCF.3010107@yandex.ru> (raw)
In-Reply-To: <jwvborwcgee.fsf-monnier+emacs@gnu.org>
On 11/28/2011 09:33 PM, Stefan Monnier wrote:
> It's great to see that it can speed up compilation, tho (although
> the 1.3% difference could just as well be due to noise).
This noise is quite repetitive, and it should be even more repetitive
and visible after fitting Lisp_String within 32 (or 16, on 32-bit) bytes.
> You might want to check what proportion of those strings have a
> NULL `intervals' field.
I believe it's typical to have 20-50 intervals for 10000 strings, so
it's worth trying to store string intervals separately (in a kind
of hash table, for example). On the other side, there is a reason to
have extra sizeof(void *) bytes at the beginning of Lisp_String - to
use by NEXT_FREE_LISP_STRING.
Dmitry
prev parent reply other threads:[~2011-11-29 5:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-28 9:11 immediate strings #2 Dmitry Antipov
2011-11-28 17:33 ` Stefan Monnier
2011-11-28 19:48 ` Ken Raeburn
2011-11-28 20:10 ` Andreas Schwab
2011-11-28 21:54 ` Stefan Monnier
2011-11-28 22:25 ` Andreas Schwab
2011-11-29 0:57 ` Ken Raeburn
2011-11-29 8:44 ` Andreas Schwab
2011-11-29 15:48 ` Ken Raeburn
2011-11-29 16:08 ` Andreas Schwab
2011-11-30 16:43 ` Ken Raeburn
2011-11-28 22:18 ` Paul Eggert
2011-11-29 2:07 ` Stefan Monnier
2011-11-29 3:37 ` Dmitry Antipov
2011-11-29 8:50 ` Paul Eggert
2011-11-30 5:37 ` Dmitry Antipov
2011-11-30 9:35 ` Paul Eggert
2011-11-30 16:43 ` Ken Raeburn
2011-11-30 21:44 ` Paul Eggert
2011-11-29 3:17 ` Dmitry Antipov
2011-11-29 5:29 ` Dmitry Antipov [this message]
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