On Mon, 2008-01-07 at 13:08 -0500, Bernardo Innocenti wrote: > Note that we compress 4KB blocks in jffs2. With small block sizes, > algorithms with better compression tend to loose most of their > advantage. > > We can't say much until we benchmark lzo vs gzip with small > files.
Nonetheless, I decided to benchmark the compressors on http://xs-dev.laptop.org/~cscott/olpc/streams/joyride/build1513/devel_jffs2/xo-1-olpc-stream-joyride-build-1513-20080105_1602-devel_jffs2-tree.tar.bz2 Results: Uncompressed 732M LZO -1 (fast) 345M LZO -9 (slow) 298M Gzip (defaults) 269M Bzip2 (as downloaded) 236M Note that fast vs. slow refers to compression speed. Decompression is the same speed in either case. These tests were run on the whole tar-file. As noted by Bernie, the differences would likely be smaller on 4KB blocks. --Ben _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel