Doesn't matter. The join in the code near the start is an example of placing the generated data into an SQL statement. join would run at the exact same rate (ignoring system noise) for the benchmarks, so there's no reason to have it in.

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated