[Cocci] coccinelle-tests.tgz is *big*; have you considered compressing with xz?

[Jim Meyering]

Hi,

I've just downloaded coccinelle-tests.tgz, all 240MiB of it.
That takes a while, even at over 600KB/s.

You might want to distribute an xz-compressed tarball as well.
I recompressed with xz (http://tukaani.org/xz/), and got this:

    $ xz -9ev coccinelle-tests.tar
    ...
    $ du -h coccinelle-tests.tar.xz
    71M

That's 1/4 the size.

In case you haven't heard of XZ yet, that's probably
because it's relatively new.  It's the successor to LZMA,
which is now deprecated.  If you're wondering whether it
is mainstream enough, I use it to make upstream coreutils
releases and automake and GNU tar already support it.

The only thing to bear in mind is that compression takes longer,
sometimes substantially longer, but for something that will be
compressed once and then downloaded many times, it's usually
well worth it.