I think this is an XY problem

You seem to be processing files, those operations are in general magnitudes slower than any loop constructs.

For instance slurping instead of iterating can make a huge difference.

So I hope you are not comparing apples with oranges.

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

In reply to Re: Speed comparison of foreach vs grep + map by LanX
in thread Speed comparison of foreach vs grep + map by mldvx4

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