27437c83cf
By having a layer as a short (16 bits) we can pack it together with the bitfields, saving 4 bytes per sub-struct, 8 bytes in total, also bringing the struct down from 4 to 3 cachelines on my laptop. Rationale: layers are mostly used to differentiate groups of objects and they stacking, usually we have few layers and we use very large or very small numbers to make a layer be at the top or at the bottom, but usually we don't need so many layers. Caution: code that use values like 999999 will break, so fix your code! I'll provide another patch to fix all the CVS using these large values. SVN revision: 34420 |
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