Thanks for the information! Indeed when testing with version 5.22 the timing differences are completely gone.

P.S.: my trials to install Devel::NYTProf in strawberry perl 5.22.0.1 (Windows 7) failed (due to some failed tests). Did others make the same experience?

In reply to Re^4: "my" slowing down programs? by jf1
in thread "my" slowing down programs? by jf1

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