When I run the benchmark you are referring to, I get a slight win for "None" over "qr". Your results showed a difference of about 10% - not what I call significant.

I never said qr// is bad. I just argued against blindly using qr// for no other reason than <quote>it's a good thing to do</quote>. About the only benefit I've seen from qr// is that it interpolates like regular expressions, and not like double quoted strings. But the interpolation is only slightly different.

Abigail