When android.permission.CAMERA is requested, applications have to composite their screen with a potential camera image every frame, even if a camera is not actually in use.This will impact performance significantly.
A new application descriptor tag has been introduced, default value is false. If your content uses a depth or stencil buffer then you must include this element with a value of true in your applicationDescriptor.xml file for the content to render properly. If you are creating 3D content, it is very likely that you need to specify this element.If depthAndStencil is not set to true in your application descriptor file, you will get an error if you try to configure your backbuffer with depth and stencil.Not enabling the depth and stencil buffers can boost performance on Imagination tech gpu based devices (including all iOS devices).2D content should not specify this flag in the application descriptor unless it really needs to use the stencil or depth buffers. Please note that in order to see the error that will be thrown for a mismatch between this app descriptor flag and what the content might try to use in context3D.configureBackBuffer(), the author must set Context3D.enableErrorChecking to true.
application descriptor Example: content that uses depth or stencil buffer