I get a 3% difference, even taking the iterations up to a million times:

 perl t
          Rate interp nonint
interp 12585/s     --    -3%
nonint 12928/s     3%     --

[download]

How does it vary with longer string interpolations?

--
TTTATCGGTCGTTATATAGATGTTTGCA

In reply to Re: String Concatenation Performance by TomDLux
in thread String Concatenation Performance by pbeckingham

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