array index vs string charAt

JavaScript performance comparison

Revision 15 of this test case created by

Preparation code

<script>
var str = "g9p87ngyp876ncw65-8ut9-84ttttp1n[8xt[ntg[5nf87y42xn49p54545454mny0t968uy908u9ymi409yikj,obvmy985uv98n7y87fy5786fty6t687t71t76r276bt87y4npt9vhm98phvt9",
    arr = str.split("");
</script>script
    

Preparation code output

script

Test runner

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

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