save memory after login/logout
save memory after login/logout

zixia/wechaty,mukaiu/wechaty,wechaty/wechaty,lijiarui/wechaty,binsee/wechaty,binsee/wechaty,Chatie/wechaty,mukaiu/wechaty,wechaty/wechaty,mukaiu/wechaty,binsee/wechaty,zixia/wechaty,lijiarui/wechaty,Chatie/wechaty,Chatie/wechaty,wechaty/wechaty