I'd be interested to see how (if at all) these optimisations in file size impact the battery life and performance. Alpha blending isn't free (though neither is

I'd be interested to see how (if at all) these optimisations in file size impact the battery life and performance. Alpha blending isn't free (though neither is overdraw), and using more CPU than 'disk' could use more power. Though the differences could be lost in the noise. Has anyone done these sorts of trials?