From: Aaron Jensen <aaronjensen@gmail.com>
To: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Cc: 26397@debbugs.gnu.org
Subject: bug#26397: 25.1; call-process slow on macOS and slower on larger frames
Date: Sat, 8 Apr 2017 08:47:25 -0700 [thread overview]
Message-ID: <CAHyO48wNKPu_MUT2sotiQPPVom=cttY9argqYJyYJ2NUG0mxgQ@mail.gmail.com> (raw)
In-Reply-To: <wly3vbwds6.wl%mituharu@math.s.chiba-u.ac.jp>
On Sat, Apr 8, 2017 at 12:37 AM, YAMAMOTO Mitsuharu
<mituharu@math.s.chiba-u.ac.jp> wrote:
>
> Probably "fork" copies some GUI resources. That would also explain
> why the performance is worse on the Mac port, where each frame
> allocates an extra NSWindow for overlaying.
>
> It becomes much faster and seemingly unaffected by the frame size if
> you comment out "#undef HAVE_WORKING_VFORK" and "#define vfork fork"
> in src/conf_post.h. But I'm not sure if it is safe.
Wow, that does make a big difference. The comment says that Emacs
hangs when evaluating:
(make-comint "test0" "/nodir/nofile" nil "")
But I can not reproduce that currently with vfork. I do not understand
the second comment: "Also, setsid is not allowed in the vfork child's
context as of Darwin 9/Mac OS X 10.5."
How might I test that?
I'm happy to run with a build that has this change for a while and see
how it goes.
Perhaps this is no longer an issue in current macOS? Are there any
version specific pragmas for osx?
next prev parent reply other threads:[~2017-04-08 15:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-08 6:25 bug#26397: 25.1; call-process slow on macOS and slower on larger frames Aaron Jensen
2017-04-08 7:37 ` YAMAMOTO Mitsuharu
2017-04-08 15:47 ` Aaron Jensen [this message]
2017-04-08 19:19 ` Alan Third
2017-04-09 13:01 ` Alan Third
2017-04-09 15:07 ` Aaron Jensen
2017-04-09 19:18 ` bug#26397: [PATCH] Use vfork if possible on Darwin (bug#26397) Alan Third
2017-04-09 20:32 ` Andreas Schwab
2017-04-09 21:34 ` Alan Third
2017-04-09 23:46 ` YAMAMOTO Mitsuharu
2017-04-10 0:06 ` Aaron Jensen
2017-04-10 1:11 ` YAMAMOTO Mitsuharu
2017-04-10 4:13 ` Aaron Jensen
2017-04-10 15:42 ` bug#26397: [PATCH v2] " Alan Third
2017-04-11 7:06 ` YAMAMOTO Mitsuharu
2017-04-18 2:29 ` Aaron Jensen
2017-04-18 10:48 ` Alan Third
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