Compare Regex to JS

JavaScript performance comparison

Test case created

Preparation code

<script src="//documentcloud.github.com/underscore/underscore-min.js"></script>
<script>
Benchmark.prototype.setup = function() {
    var tests = [
      "abc",
      "abcdefghijk",
      "abdfkmnpstvxz",
      "cxy",
      "cdklstxy",
      "bfrtw",
      "a b c",
      "acg jko pr",
      "a z",
      "v  z",
      "a  b cdefg kl",
      "uv xyz",
      "ab de gh",
      "x yz",
      "abcdefghijklmnopqrstuvwxyz",
      "abbc",
      "abcb",
      "a bcdjkrza",
      "qwerty",
      "zyxcba",
      "abcdfe",
      "ab c dfe",
      "a  z  a",
      "asdfg",
      "asd  f g",
      "poqwoieruytjhfg"
    ];
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
regex
var reg = /^a? *b? *c? *d? *e? *f? *g? *h? *i? *j? *k? *l? *m? *n? *o? *p? *q? *r? *s? *t? *u? *v? *w? *x? *y? *z?$/;

for(var i=0; i<tests.length; i++) {
  reg.test(tests[i]);
}
pending…
vanillaJS
var alphabetical = function(str) {
  var last = " ";
  for(var i=0; i<str.length; i++) {
    if(str[i] == ' ') continue;
    if(str[i] > last) {
      last = str[i];
    } else {
      return false;
    }
  }
  return true;
}

for(var i=0; i<tests.length; i++) {
  alphabetical(tests[i]);
}
pending…

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