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Re: BASE_PURESIZE
From: |
Eli Zaretskii |
Subject: |
Re: BASE_PURESIZE |
Date: |
Sat, 24 Oct 2009 15:18:57 +0200 |
> From: Andreas Schwab <address@hidden>
> Cc: address@hidden
> Date: Sat, 24 Oct 2009 12:37:19 +0200
>
> Eli Zaretskii <address@hidden> writes:
>
> > For the record, the extra use of purecopy caused the pure_bytes_used
> > value to go up by 52KB on 32-bit Windows, and by 92KB on 64-bit
> > GNU/Linux. So it looks like the ratio is actually closer to 9/5 than
> > to either the old 10/6 or the new 11/7. Or maybe I'm missing
> > something.
>
> It all depends on the ratio of string data vs. lisp object pure storage.
I made some measurements. The ratio of 11/7 seems to work pretty
well, but there are two additional problems:
. The default value of SYSTEM_PURESIZE_EXTRA is zero, and is not
increased for GUI builds. This causes a --without-x build to waste
some 100KB. If we want to handle this, the basic constant in
BASE_PURESIZE can be as low as 1290000 and SYSTEM_PURESIZE_EXTRA
should have its default at 140000 for GUI builds, zero otherwise.
. The amount of pure storage used by load-history depends on the
length of the filename of the directory where Emacs is dumped. In
my case, I have 32 characters before the "emacs/lisp/" part, so I'm
guessing that's the main reason the value of 1430000 was too small
for me.
We could decide that we don't care too much about the --without-x
case, but what about the second problem? If we want to handle it
without wasting storage on systems with shorter file names, we would
need some code in src/Makefile.in that would measure the length of the
directory name and enlarge PURESIZE accordingly.
- BASE_PURESIZE, Eli Zaretskii, 2009/10/23
- Re: BASE_PURESIZE, Andreas Schwab, 2009/10/23
- Re: BASE_PURESIZE, Eli Zaretskii, 2009/10/24
- Re: BASE_PURESIZE, Andreas Schwab, 2009/10/24
- Re: BASE_PURESIZE,
Eli Zaretskii <=
- Re: BASE_PURESIZE, Dan Nicolaescu, 2009/10/24
- Re: BASE_PURESIZE, Stefan Monnier, 2009/10/24
- Re: BASE_PURESIZE, Dan Nicolaescu, 2009/10/25
- defcustom standard-value (was: Re: BASE_PURESIZE), Dan Nicolaescu, 2009/10/29
- Re: BASE_PURESIZE, Chong Yidong, 2009/10/24
- Re: BASE_PURESIZE, Dan Nicolaescu, 2009/10/24
Re: BASE_PURESIZE, Dan Nicolaescu, 2009/10/23
Re: BASE_PURESIZE, Juanma Barranquero, 2009/10/23