regex vs. split (v15)

Revision 15 of this benchmark created by Jensyn on

Preparation HTML

<script>
  function dirname(path) {
   var s = path.split('/').slice(0, -1).join('/');
   return s ? s : '.';
  }
  
  function dirname2(path) {
   var s = ('./' + path).replace(/(.*)?\/.*/, '$1').substring(2);
   return s ? s : '.';
  }
  
  function dirname3(path) {
   var s = (path).match(/.*(?=\/.*$)/);
   return (s ? s[0] : '.') + '/';
  }
  function dirname4(path) {
    var i = path.lastIndexOf("/")
    return i > -1 ? path.substring(0, i) : null[0];
  }
  var DIRNAME_RE = /[^?#]*\//
  function dirname5(path) {
    return path.match(DIRNAME_RE)[0];
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
split
dirname('a/b/c.js');
dirname('a/b/c');
dirname('a/b/c/');
ready
regex
dirname2('a/b/c.js');
dirname2('a/b/c');
dirname2('a/b/c/');
ready
regex match
dirname3('a/b/c.js');
dirname3('a/b/c');
dirname3('a/b/c/');
ready
lastindexof
dirname4('a/b/c.js');
dirname4('a/b/c');
dirname4('a/b/c/');
ready
seaJS
dirname5('a/b/c.js');
dirname5('a/b/c');
dirname5('a/b/c/');
ready

Revisions

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