create-null-vs-check

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var obj = {};
    obj.foo = 1;
    obj.bar = "two";
    obj.baz = {};
   
    var dict = Object.create(null);
    dict.foo = 1;
    dict.bar = "two";
    dict.baz = {};
   
};
</script>

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Testing in unknown unknown
Test Ops/sec
obj
var arr = [];

for (var prop in obj) {
  if (!obj.hasOwnProperty(prop)) { continue; }
  arr.push(obj[prop]);
}
pending…
dict
var arr = [];

for (var prop in dict) {
  arr.push(dict[prop]);
}
pending…

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