lightweight tag fd4a722642bd7a0eeb4f02d7aea70d8c8f9e8dad r4-release
Author:	KevinSK <shinozakisama@live.com>
Date:	Mon Sep 3 01:05:47 2018 +0800

commit fd4a722642bd7a0eeb4f02d7aea70d8c8f9e8dad
Author: KevinSK <shinozakisama@live.com>
Date:   Mon Sep 3 01:05:47 2018 +0800

    optimize performance

