For my tests I used the default compression levels, so 6 (out of 1-9) for gzip, 6 (out of 1-9) for xz, and 15 (out of 5-1000) for zopfli. My input was the linux

For my tests I used the default compression levels, so 6 (out of 1-9) for gzip, 6 (out of 1-9) for xz, and 15 (out of 5-1000) for zopfli. My input was the linux kernel 3.8.1 source tarball. This was run on a macbook pro with OS X 10.8.2 and a 2.2 GHZ i7 processor. time size format n/a 987640 uncompressed 18.44 210896 gzip 281.44 143128 xz 3604.21 200640 zopfil