The $string variable contains '30'. I think you meant

my $string = join '',map { ('a'..'z')[rand 26] }1..30;

With this correction, unpack is faster. :-) 

           Rate regex1 regex2 substr unpack
regex1 225055/s     --    -1%    -4%   -53%
regex2 228189/s     1%     --    -3%   -53%
substr 235177/s     4%     3%     --   -51%
unpack 481548/s   114%   111%   105%     --

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In reply to Re^4: Performance problems on splitting long strings by Cristoforo
in thread Performance problems on splitting long strings by Laurent_R

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