But (again; just my suspicion), P6 has to in(tro)spect the argument list at runtime and then attempt a best match (or fail?) against the signatured possibilities for the given function name, at runtime. Hence the performance cost.
Erlang, for instance, is a dynamic language too (but strongly typed - like Python), it doesn't have any fancy type system and matches at runtime, its not 'fast', all in all, but its function calls are a lot faster then those of both Perls. It seems to me optimizations are possible... in theory.

In reply to Re^7: rough approximation to pattern matching using local (Multi Subs) by Anonymous Monk
in thread rough approximation to pattern matching using local by gregory-nisbet

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