Creating regular expressions

JavaScript performance comparison

Test case created by Bjorn Tipling

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var setupRegexp = /foo bar/g;
  var texts = [
    "foo bar foo bar foo bar",
    "foobarfoobarfoobar",
    "foo asdfasdfasdf bar"
  ]

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Using regular expression defined at beginning
texts.forEach(function (text) {
  while (res = setupRegexp.exec(text)) {
    //iterating over all instances of "foo bar" in text
  }
});
pending…
Using regular expression defined in loop
texts.forEach(function (text) {
  var regexp = /foo bar/g;
  while (res = regexp.exec(text)) {
    //iterating over all instances of "foo bar" in text
  }
});
pending…
Using a RegExp constructor
texts.forEach(function (text) {
  var regexp = new RegExp("foo bar", "g")
  while (res = regexp.exec(text)) {
    //iterating over all instances of "foo bar" in text
  }
});
pending…

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Revisions

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