Good point! I just wanted to compare equivalent substitutions.

Adding testC:

  'testC' => sub { my $f = $test; $f =~ s/\s+,/,/g; $f =~ s/,\s+/,/g; 
+},

100_000:
        Rate test1 test2 test3 testA testC testB
test1  6.5/s    --  -28%  -66%  -76%  -80%  -81%
test2  9.0/s   39%    --  -53%  -67%  -73%  -73%
test3 19.1/s  196%  113%    --  -29%  -42%  -43%
testA 27.0/s  318%  201%   41%    --  -18%  -19%
testC 33.1/s  412%  269%   73%   23%    --   -1%
testB 33.3/s  416%  272%   74%   23%    1%    --

[download]

C is 23% faster than A, even running twice over some of the commas in the test string. B doesn't touch a comma twice, but is only 1% faster than C.

In reply to Re^3: Comparing Regular Expressions by vitoco
in thread Comparing Regular Expressions by vitoco

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.