There is a module that uses XS instead of pure Perl (but I forget the name, and can't find it quickly - perhaps someone will enlighten us?).
However, pure Perl solutions are useful for users and situations where XS is not available, even though it's slower.
As stated earlier, pure Perl is not always the best choice when number crunching speed is of critical importance.
-QM
--
Quantum Mechanics: The dreams stuff is made of
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