openSUSE/kiwi — pull request #293 by magist3r (2013-11-28 16:37:02+00:00)
Title: Improve squashfs compression for overlayfs option

Adding '-b 1M -Xbcj x86' options reduced squashfs image size from 355 to 308 MiB. Boot time was reduced too.
I think that it would be better to replace x86 with some kind of $arch variable.
Please refer to 'mksquashfs -h' to find possible -Xbcj parameters.