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Dranith

Covarient Return performance question

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Are there any performance issues to be aware of besides the general issues associated with virtual functions when using covarient return types? I guess there would have to be an upcast if you called the function from a base class pointer, but besides that does anyone know of anything? I've searched these boards with no luck. Thanks

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It should just be an offset correction, which ought to be transparent on most CPUs (all 486+ support an indirect index as a native addressing mode). Worst case it's one add and a cache miss which is no different than the normal virtual call.

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