GNU bug report logs - #26952
25.2; repeated buffer insertion (e.g. yank-rectangle) consumes excessive memory (4GB+ for 90MB of text)

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From: npostavs <at> users.sourceforge.net
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: pot <at> gnu.org, eggert <at> cs.ucla.edu, 26952 <at> debbugs.gnu.org
Subject: bug#26952: 25.1; loops eating all memory while yanking big rectangle
Date: Sun, 21 May 2017 12:48:28 -0400

Eli Zaretskii <eliz <at> gnu.org> writes:

> Is there src/gmalloc.o in the build directory?

Yes there is.  Furthermore, in 25.2 configure output shows this:

  Should Emacs use the GNU version of malloc?             yes
  Should Emacs use a relocating allocator for buffers?    no
  Should Emacs use mmap(2) for buffer allocation?         no

In master it says this:

  Should Emacs use the GNU version of malloc?             no (only before dumping)
  Should Emacs use a relocating allocator for buffers?    no
  Should Emacs use mmap(2) for buffer allocation?         no

> Does enlarge_buffer_text eventually calls into gmalloc.c in the
> problematic build?

Yes.

> I thought we moved to system malloc in Emacs 25.2, and that was my
> reading of configure, but maybe I'm confused.

Everytime I try to read the configure code for this, I get more confused :(

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