Re: Larger GC thresholds for non-interactive Emacs

[Lars Ingebrigtsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> The first GC seems to happen before we set percentage to 2.0 (so
> apparently all compilation processes performed at least one GC before we
> set percentage to 2.0 and then the majority of them performed no further
> GC before exiting).

Hm, interesting...

> [ So if we set percentage to 2.0 a bit earlier than what happens with
> `--eval` we may gain yet a bit more time.  ]

This should probably be early enough, I guess?

diff --git a/src/emacs.c b/src/emacs.c
index 43b9901e08..33ad9c6b8d 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -1620,6 +1620,7 @@ main (int argc, char **argv)
   if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args)
       || only_version)
     {
+      Vgc_cons_percentage = make_float (2.0);
       noninteractive = 1;
       Vundo_outer_limit = Qnil;
     }


> 9.5M is actually exactly 10000000 bytes so I suspect these come from
> either `cedet/semantic.el` or `international/mule-cmds.el` which both
> set gc-cons-threshold to (max gc-cons-threshold 10000000).

Ah, I see.  Perhaps those should increase that even more if it still
leads to 18 GCs?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no