comment on

Edit: I thought I had a better version but no. I ran the same benchmark again and the results were not the same at all (actually the three solutions had very similar performances). Something went wrong with my first attempt

You can get even better results if you remove the use of captures and backreferences:

sub v6 {
    %subs = ();
    $subs{$&}++ while $string =~ m{A{2,}|C{2,}|G{2,}|T{2,}}g;
    } # v6
[download]

      Rate   v4   v5   v6
v4 55470/s   --  -9% -39%
v5 60734/s   9%   -- -34%
v6 91365/s  65%  50%   --
[download]

Edit: now that's a bad choice of delimiter 😂

I'm actually consistantly getting result that are worse without backreferences which which I don't understand...

In reply to Re^2: substrings that consist of repeating characters by Eily
in thread substrings that consist of repeating characters by Anonymous Monk

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