Hatsune Miku: Project Diva Extend

[RinkuFO]

On my android phone, I noticed that when somewhat big/many alpha blending occurred, it makes the game dropped 25-35% speed.

Uta ni katachi wa nai keredo, Disappearance of miku, and Starduster and Sekiranun Graffiti(?) are the songs that I noticed the speed is being dropped because of big/many alpha blending occurred.

example:
Uta ni katachi wa nai keredo = flashback effects (See Attachment#1)
and others (See the attachments)