add a section in the performance tips about not overly specializing on functions #54376
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This is a WIP to document best practices for cases where one wants to use the equivalent of a function pointer in Julia (specializing on the argument types but not the function itself).
Some TODOs:
OpaqueClosure
should not be experimental if this is to be recomended.FunctionWrapper
or a convenience functionwrapfunction(g::G, ::Type{AT}, ::Type{RT})
) on top of OpaqueClosure that should be used instead of directly using theOpaqueClosure