On Jul 9, 5:20 pm, Kevin Horton <[email protected]> wrote:
> I have tried compressing the sage.*.tar files using gzip and bzip2.
> The compression is insignificant, at least when using the default
> compression levels.
>
> % ls -l *tar*
> -rw-r--r-- 1 XXX staff 215244800 Jun 19 08:46 sage-4.0.2.tar
> -rw-r--r-- 1 XXX staff 214183786 Jun 19 08:46 sage-4.0.2.tar.gz
> -rw-r--r-- 1 XXX staff 215169684 Jun 19 08:46 sage-4.0.2.tar.bz2
>
Out of curiosity I tried to use lzma with "7z" in ubuntu linux to
shrink the included spkgs smaller:
in $SAGE/spkg/standard/
for i in *.spkg; do
echo $i
tar xjf $i
7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on $i.7z ${i%\.spkg}
rm -rf ${i%\.spkg}
done
result:
["insgesamt" = total]
$ du -csh *.spkg | grep insges
205M insgesamt
$ du -csh *.7z | grep insges
159M insgesamt
$ echo "159/205" | bc -l
.77560975609756097560
but 7z not installed by default and we would have to include the 7z
sources, compile them, and then do the extraction.
h
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