In fact, gzip may not necessarily be the speed leader for long. The XZ
format was especially designed to support parallelization, so on modern
quad-core processors it has the potential to be even faster than gzip.
Unfortunately, even though the file format can handle it, the current xz-
utils does not support parallelization yet.
Also, maybe one shouldn't be measuring decompression time in isolation, but
add in download time as well? If the user spent 5 less seconds downloading
the tarball, then does it matter if it takes 5 seconds more to decompress