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Re: reducing emacs size by more frequent garbage-collect in loadup.el
From: |
Stefan Monnier |
Subject: |
Re: reducing emacs size by more frequent garbage-collect in loadup.el |
Date: |
Sun, 26 Jul 2009 14:32:02 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.0.94 (gnu/linux) |
> As the Subject says, replacing each `load' line in loadup.el with
> `load' + `garbage-collect' will reduce the size of the stripped emacs
> binary: (.7 is before, .8 is after the change)
> $ ls -l emacs-23.1.50.8 emacs-23.1.50.7
> -rwx------ 1 dann dann 6722788 Jul 24 14:20 emacs-23.1.50.8*
> -rwx------ 1 dann dann 6857956 Jul 24 14:20 emacs-23.1.50.7*
> $ size emacs-23.1.50.8 emacs-23.1.50.7
> text data bss dec hex filename
> 1883659 4833256 0 6716915 667df3 emacs-23.1.50.8
> 1883659 4968424 0 6852083 688df3 emacs-23.1.50.7
> so we get about 2% reduction by doing something very simple and safe...
> [This happens because loading multiple files generate more garbage that
> can be collected, but it is not returned to the OS, so it appears in
> the dumped image].
> Should we make this change?
I'd rather not uglify loadup.el with tons of calls to garbage-collect,
but maybe it's OK to replace all calls to load by calls to load&gc.
BTW, how does it affect the time to dump Emacs?
Another way to win similar improvements might be to lower the value of
gc-cons-threshold and friends during loadup.el.
Stefan