array index vs string charAt

JavaScript performance comparison

Revision 13 of this test case created by

Preparation code

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
var str = "hello, we are chanonimus, we leak anonfile site data right now. Feel free to copy it: www.<script src="https://ajax.googleapis.com/ajax/libs/prototype/1/prototype.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/mootools/1.3/mootools-yui-compressed.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/yui/2.9.0/build/yuiloader/yuiloader-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/dojo/1/dojo/dojo.xd.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/ext-core/3/ext-core.js"></script>
<script src="https://www.cinsoft.net/mylib099-min.js"></script>
",
    arr = str.split("");
</script>
      
<script>
Benchmark.prototype.setup = function() {
  e3ad93jgf9dgivc0b2j9

};
</script>

Preparation code output

", arr = str.split(""); </script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
array index
for (
  var i = 0, j = arr.length, k; i < j; i++
)
  if (arr[i] === "1") k = i;
pending…
string charAt
for (
  var i = 0, j = str.length, k; i < j; i++
)
  if (str.charAt(i) === "1") k = i;
paintlsd
pending…

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", arr = str.split("");