array vs obj (v14)

Revision 14 of this benchmark created by Mattia on

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var collectionObj = {};
  var collectionArr = [];

Array.prototype.indexOf2 = function (searchElement /*, fromIndex */ ) {
        "use strict";
        if (this == null) {
            throw new TypeError();
        }
        var t = Object(this);
        var len = t.length >>> 0;
        if (len === 0) {
            return -1;
        }
        var n = 0;
        if (arguments.length > 1) {
            n = Number(arguments[1]);
            if (n != n) { // shortcut for verifying if it's NaN
                n = 0;
            } else if (n != 0 && n != Infinity && n != -Infinity) {
                n = (n > 0 || -1) * Math.floor(Math.abs(n));
            }
        }
        if (n >= len) {
            return -1;
        }
        var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
        for (; k < len; k++) {
            if (k in t && t[k] === searchElement) {
                return k;
            }
        }
        return -1;
    }

  for (var i = 0; i < 1000; i++) {
   collectionObj["string" + i] = "doesn't matter";
   collectionArr.push("string" + i);
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
obj
collectionObj.hasOwnProperty("string500");
ready
array
jQuery.inArray("string500", collectionArr)
ready
array indexof
collectionArr.indexOf("string500") !== -1;
ready
not in object
collectionObj.hasOwnProperty("string1001");
ready
not in array
jQuery.inArray("string1001", collectionArr)
ready
not in array indexof
collectionArr.indexOf("string1001") !== -1;
ready
array indexof2
collectionArr.indexOf2("string500") !== -1;
ready

Revisions

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