How much memory do we have on he iphone for 3d objects and textures? 24 MB i think, right? … If i have a texture, which i reuse 10 times… does it improve performance instead of using everytme a new texture?
24MB is a chunk of memory which is shared between CPU and GPU. It is a good way of thumb to plan your assets to take less space than that actually.
Yes, reusing texture can significantly improve your performance, both on CPU - less state changes, less draw-calls, etc and GPU - better texture cache coherency.