use zofpli !

App-perlbrew-0.67.tar.gz is 4k smaller comparing to the gzip (default).

> ls -ks App-perlbrew-0.67.tar.gz ~/shipit-dist/App-perlbrew-0.67.tar.gz
 84 /Users/gugod/shipit-dist/App-perlbrew-0.67.tar.gz
 80 App-perlbrew-0.67.tar.gz