Comment by silentvoice

How is this for "performance portability?" I use this solution in C when the function is very expensive, therefore a little extra indirection really won't make any difference - but can potentially improve the reusability a lot. Is inlining calls to function via a pointer a very basic optimization that any self respecting compiler should be able to do, or is it a very advanced optimization that I can't count on working across platforms? Given the possibility of dynamic libraries I don't see how it could be inlined in all cases, therefore at least some kind of analysis must be done before trying it.