I might also offer the suggestion that the regexp you've chosen is hard work for Perl. It means capture as much as possible, and only then check if a pipe symbol comes afterwards. That there are several of these ensures that this regexp isn't that efficient.

You might like to try something like the following:

  my $re = qr/
    (?:      # start non-capturing group
      [^\|]+ # as many non-pipe characters as possible
      \|     # followed by a pipe character
    ){5}     # and ensure there are 5 such groups in a row
    ([^\|]+) # capture as many non-pipe chars as possible
  /x;

[download]

Using Benchmark the new regular expression here was 400% faster on my computer:

           Rate oldway newway
oldway 108225/s     --   -81%
newway 563910/s   421%     --

[download]

Update: corrected URL

In reply to Re^2: Replace part of a regex match by monarch
in thread Replace part of a regex match by krisravn

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