tree 5f41baf1de262b1f5f2cabf768ffb73bed3b93e6
parent 9b604cb8971ee510317970ea6cf98a5d44f3c422
author Debargha Mukherjee <debargha@google.com> 1526750613 -0700
committer Debargha Mukherjee <debargha@google.com> 1526938152 +0000

Add speed feat to prune tx search based on model

The feature has 3 levels: 0 - unused, 1-2 increasing
aggressiveness progressively.

When tested on speed 0, lowres, 20 frames:
level 1: +0.07% with ~5-10% speed-up
level 2: +0.20% with ~10-15% speed-up.

Currently level 1 is used at speed 0+.

With better modeling (ongoing work) I expect these trade-offs
to get better.

Change-Id: Ic188b8b4344ae729f93023b188c94fffeecb36c5