Any way to make it faster ?

On my machine, this is slightly faster still:

'substr_loop2' => sub
{
  my @arr;
  my $s = $str;
  push @arr, substr $s, 0, 8, '' while $s;
},

[download]

More seriously, though, not all the subs in your OP are equivalent: 'substr_map' will truncate any string at a multiple of eight characters, while the others will include the extra characters in the final element of the array (Fengor's my @arr = $str =~ /(........)/g has the same problem).

In reply to Re: Splitting a string to chunks by Not_a_Number
in thread Splitting a string to chunks by spurperl

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