Hello, chris212.

It's always great to hear back on whether the solution posted was helpful or not. Thank you for writing. I did some extra testing myself and came to realization that your "testa" demonstration takes a very long time under Cygwin (~ 40x longer) versus running under Strawberry Perl. On the contrary, the two MCE solutions completed in the same time frame for Cygwin and Strawberry Perl.

Kind regards, Mario.

In reply to Re^7: shared scalar freed early by marioroy
in thread shared scalar freed early by chris212

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