if in

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var a = {0:1,2:3,4:5,6:7,8:9,10:11,12:13,14:15,16:17,18:19};
};
</script>

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Testing in unknown unknown
Test Ops/sec
if in
var x = 0;
if (12 in a) {
 x++;
}
if (11 in a) {
 x++;
}
pending…
if
var x = 0;
if (a[12]) {
 x++;
}
if (a[11]) {
 x++;
}
pending…

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