ref: 4c1a8be29d51b9e3face742ff145995996a0da20
parent: ccae5d99d24a74f60a07a48ef98149d893fb15aa
author: hkuang <hkuang@google.com>
date: Fri May 1 08:35:08 EDT 2015
Optimize the read_partition. Change-Id: I5a796425ce5706824a2fc17c6f24f983c5b9e43b