How to optimize Opengl es 1.1 app?

[blueshell]

I just draw a 640*360 image (create as 1024*512 for 2^n,but vertex point is 640,360)
in X6-00 it will lower than 10fps
where c6-01 is only about 15fps

can any one give me some advices?

[Devnull]

The C6-01 has accelerated graphics and the X6-00 does not. Advices are available in our wiki, documentation and projects section.

[blueshell]

but some game in X6 has 15 FPS or more.
I find that :
I create a project with empty opengl cycle.
if ever called glClear(GL_STENCIL_BUFFER_BIT)
FPS in C6-01 only has 15FPS, while remove glClear(GL_STENCIL_BUFFER_BIT) , i will got 60FPS.

but X6 only has 20FPS with nothing drawing.
does i forget something?

[Devnull]

Please look at the SDK example code for a reference implementation.