GNU bug report logs - #45200
Wishlist: There should be a `malloc-trim' function

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Package: emacs;

Reported by: Konstantin Kharlamov <hi-angel <at> yandex.ru>

Date: Sat, 12 Dec 2020 18:44:02 UTC

Severity: wishlist

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Message #68 received at 45200 <at> debbugs.gnu.org (full text, mbox):

From: DJ Delorie <dj <at> redhat.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: carlos <at> redhat.com, fweimer <at> redhat.com, monnier <at> iro.umontreal.ca,
 45200 <at> debbugs.gnu.org, Hi-Angel <at> yandex.ru
Subject: Re: bug#45200: [PATCH] Force Glibc to free the memory freed
Date: Mon, 25 Jan 2021 17:17:27 -0500

Eli Zaretskii <eliz <at> gnu.org> writes:
> Thanks, but is it really a good idea to call malloc_trim each time we
> free some chunk of memory?

malloc_trim() is very expensive relative to free(), partly because of
what it needs to do, and partly because it flushes the fastbins cache.
If you call it every, say, 1000 iterations of free, that might suffice.
Or perhaps after each GC run.
This bug report was last modified 3 years and 78 days ago.

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