Use compressed texture formats when possible, otherwise prefer 16bit textures over 32bit.
如果可以，尽量使用压缩纹理格式；否则，16位格式纹理性能好于32位的。
A comparison of uncompressed vs compressed texture performance can be found in the iOS Hardware Guide.
未压缩与压缩纹理性能的比较，可以在iOS硬件指南找到。
A comparison of uncompressed vs compressed texture performance can be found in the iOS Hardware Guide.
未压缩与压缩纹理性能的比较，可以在iOS硬件指南找到。
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