Testing regular expressions

JavaScript performance comparison

Revision 2 of this test case created by Bjorn Tipling

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var regexp = /foo bar/g,
  texts = [
    "nope this string has no results but its not even that long",
    "foo bar foo bar foo bar",
    "foobarfoobarfoobar",
    "foo asdfasdfasdf bar",
    "this string also has no results"
  ]

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
No test
texts.forEach(function (text) {
  var regexp = /foo bar/g;
  while (res = regexp.exec(text)) {
    //iterating over all instances of "foo bar" in text
  }
});
pending…
with test
texts.forEach(function (text) {
  var regexp = /foo bar/g;
  if (regexp.test(text)) {
    regexp.lastIndex = 0;
    while (res = regexp.exec(text)) {
      //iterating over all instances of "foo bar" in text
    }
  }
});
pending…

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