Could you please diagnose my bottleneck?

[The Phoenix]

Thanks for your reply, but I think the main problem is very simple: my device is slow. My phone is LG Vu 3, which uses the same CPU/GPU with Nexus 5, but the firmware bug seems to be not my case. My game is KHBbS, which runs at decent speed in many scenes but slows down dramatically if there are effects, like splashing water, on the screen.
I believe the real solution is buying a better PC.

Hi there whgang99,

Have tried the following settings, on the Graphics tab, under Performance:
1xPSP
Same as rendering resolution
Hardware resolution: ticked
Software Skinning: ticked
Lazy texture caching: ticked
Retain changed textures: untucked
Disable slower effects: ticked
Spline/Bezier curves quality: Low.

If that doesn't work, try enabling Frameskip to 1 x or 2 x, this combined with settings above should get your performance up.