ref: c6f1bf43210f93dafbae4a2744cadd6f18924255
parent: 2210767c3f7ce179ea9b352c8de2790b23487bca
author: Deb Mukherjee <debargha@google.com>
date: Thu Apr 12 05:24:03 EDT 2012
Differential encoding of probability updates Adds differential encoding of prob updates using a subexponential code centered around the previous probability value. Also searches for the most cost-effective update, and breaks up the coefficient updates into smaller groups. Small gain on Derf: 0.2% Change-Id: Ie0071e3dc113e3d0d7ab95b6442bb07a89970030