Think about what the static background actually is. It's probably either an image (which is already just a static GL texture, no need to cache your bitmap in an

Think about what the static background actually is. It's probably either an image (which is already just a static GL texture, no need to cache your bitmap in another bitmap), or it's something like a round rect which can actually be rendered faster than sampling from a texture (since it's a simple quad + a simple pixel shader - no texture fetches slowing things down). In such a scenario a GPU layer just ends up making things slower and uses more RAM.