On 22 September 2013 03:55, erik quanstrom <quanstro@quanstro.net> wrote:

        new     1.55e10         O=10    M=8
        old     2.74e10

        new     3.64e10         O=0     M=8
        old     5.14e10

am i doing something fundamental wrong, or are the new locks substantially
slower than the old ones?

In those cases, the new times seem to be quite a bit faster, more than they are slower in the cases you found
slower, which involved only one process (if I understand the tests)