From 48f790691602e70bc4e1825e9eca405d4a0b67e2 Mon Sep 17 00:00:00 2001
From: JerryYanWan <ywanad@connect.ust.hk>
Date: Sat, 1 Apr 2017 10:53:09 +0800
Subject: [PATCH] clear the weights then clone to save memory