As always the devil is in the detail. Consider for example: 
{
    $s = ".....X.....";
    $s =~ s/X/Y/;
    $x = eval q{ "[ $`$& $' ]" };
}

[download]
You can't rely on PL_sawampersand.

Dave.

In reply to Re^5: Substitution with regex and memory consumption by dave_the_m
in thread Substitution with regex and memory consumption by k-mx

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