suggestion to use lzma for snapshots, maybe more?

[Kevin Hunter <hunteke at earlham dot edu>]

Hi GNU GCC folks,

I was idly looking through a couple of snapshots of the gcc -trunk line.
 I am by no means a compiler developer, but I did notice that you aren't
using lzma for compression.  I don't know if bandwidth is at all a
concern, but I can point to a >20% drop in download size:

$ svn co svn://gcc.gnu.org/svn/gcc/trunk gcc-trunk
  ...
$ find gcc-trunk -name ".svn" -type d -print0 | xargs -0 rm -rf
$ tar -cf - gcc-trunk | lzma  --best > gcc-trunk.tlz &
$ tar -cf - gcc-trunk | bzip2 --best > gcc-trunk.tbz &
$ wait
$ ls -lh gcc-trunk.t?z
-rw-r--r-- 1 kevin kevin 58M 2010-01-12 18:44 gcc-trunk.tbz
-rw-r--r-- 1 kevin kevin 46M 2010-01-12 18:41 gcc-trunk.tlz

lzma takes about 6 times as long, but on my machine it takes just over 7
minutes, which I'd say is reasonable:

$ tar -cf - mygcc   | \
>  pv -cN i -s 402m | \
>  lzma --best      | \
>  pv -cN o > gcc-trunk.tlz
  i:  402MB 0:07:09 [ 958kB/s] [===============>] 100%
  o: 45.1MB 0:07:10 [ 107kB/s] [          <=>                   ]

Anyhoo, since lzma is available on most distros now, I thought I'd
proffer it as a suggestion to y'all.

G'day,

Kevin