On Mar 10, 2015, at 12:02 PM, Andrew Haley <a...@redhat.com> wrote: > > The new algorithm is slightly slower because of branch misprediction. > > old: 2.17 IPC, 0.08% branch-misses, 91,965,281,215 cycles > new: 1.23 IPC, 6.11% branch-misses, 99,925,255,682 cycles > > ...but it executes fewer instructions so we're only talking about > some 10% slowdown. I think this is the worst case (or something > close to the worst case) for the new algorithm. > > So, I think we're OK performance-wise.
I agree. > > John: I'm waiting for an answer to my question here before I submit > a webrev for approval. > > http://mail.openjdk.java.net/pipermail/panama-dev/2015-March/000099.html > <http://mail.openjdk.java.net/pipermail/panama-dev/2015-March/000099.html> (Answered.)
