this or var

JavaScript performance comparison

Revision 2 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    this.a = 2;
};
</script>

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Testing in unknown unknown
Test Ops/sec
local variable
var a = 2;
a*a*a;
 
pending…
object property
this.a * this.a * this.a;
pending…
cached object property
var a = this.a;
a * a * a;
 
pending…
property of local object
var obj = { a: 2 };
obj.a * obj.a * obj.a;
 
pending…
cached property of local object
var obj = { a: 2 };
var a = obj.a;
a * a * a;
 
pending…

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