Ah, right, the original goal was not to remove all whitespace, but to compress whitespace. Here's a new benchmark: 
#!perl
use Benchmark;
my $junk =
  '  The   quick   brown   fox   Jumped   over   the   lazy   dog  ';
timethese(-10,
{
  'split'    => sub { $x = join ' ', split ' ', $junk; },
  'trans'    => sub { ($x = $junk) =~ tr/ \t\r\n/ /s;
                      $x =~ s/^ //; $x =~ s/ $//; },
  'subst'    => sub { ($x = $junk) =~ s/\s+/ /g;
                      $x =~ s/^ //; $x =~ s/ $//; },
  'subst2'   => sub { ($x = $junk) =~ s/^\s+//; $x =~ s/\s+$//;
                      $x =~ s/\s+/ /g; },
});

[download]
And the results: 
Benchmark: running split, subst, subst2, trans,
  each for at least 10 CPU seconds...
     split: 41225.50/s
     subst: 40796.61/s
    subst2: 38222.28/s
     trans: 72880.42/s

[download]
split fares much better when the task is to compress whitespace, beating either substitution solution, but translate is still the winner. The extra substitutions to remove whitespace at the beginning and the end of the string slow down quite a bit the solutions which require them.

In reply to Re: Re: Re: Re: Craftier by chipmunk
in thread Craftier by snax

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