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Re: reducing emacs size by more frequent garbage-collect in loadup.el
From: |
Dan Nicolaescu |
Subject: |
Re: reducing emacs size by more frequent garbage-collect in loadup.el |
Date: |
Sun, 26 Jul 2009 11:57:14 -0700 (PDT) |
Stefan Monnier <address@hidden> writes:
> > 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?
It's in the noise for a 3 year old machine that I tried it on.
> Another way to win similar improvements might be to lower the value of
> gc-cons-threshold and friends during loadup.el.
This sounds like it's a bit more complicated...