Bug#693859: benchmark details and releases

[David Bremner <bremner@debian.org>]

 > - - This one seems about 25% faster compressing in some simple tests I
 >   ran (compressing a 2.7G file with 6 threads, maximum compression).
 >   Decompression seems to be a wash between xz, pxz, and pixz on files
 >   produced by xz. On files produced by pixz, pixz is noticably faster 

It should be noted that the final sizes are as follows

 331M xz -9
 352M pxz -9
 399M pixz -9

So, as usual, I guess there is no free lunch.

Of course, compared to gzip -9 at 853M, they're all good options.

Also, upstream very kindly released 1.0 today, so that will probably be
the initial version I package.

d