[JBoss-dev] pack200 compression

[Scott M S. <sco...@jb...>]

Sacha reminded me of the pack200 compression tool in jdk5 and packing
the all/lib jars results in about a 76% savings:

[starksm@banshee9100 lib]$ du -s x
31703   x=20
[starksm@banshee9100 lib]$ ls -l x.jar
-rw-rw-rw-  1 starksm None 13580330 Jun  2 16:16 x.jar
[starksm@banshee9100 lib]$ /usr/java/jdk1.5.0_02/bin/pack200 x.jar.gz
x.jar
[starksm@banshee9100 lib]$ ls -l x.jar.gz
-rwxrwxrwx  1 starksm None 3232001 Jun  2 16:17 x.jar.gz*

3232001 / 13580330
.23799134483477205634

The x.jar is the concatenation of all jars. The same relative
compression ratio is seen if all of the jars are individually packed as
well. Something to look at for dists in the future.