(5.2.4 UI)Resources.Load and Instantiate A UI Prefab too lag On Andriod Device...fine in apple

when i open my UI_BAG …fine in PC Client(Unity Editor)…
but it costs nearly 13s in Andriod device…
with my Debug …Resource.load cost too much time…

Just the Bag Ui Has this issues…

Any guys meet this situation too?

at last…i found: i add nearly 120 items in my ui_bag…

when i remove them all…open much more faster than before…