question about variable scoping

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function a() {
        var x = "Some string";
        function inner() {
            console.log(x);
        }
        for (var i = 0; i < 1000; i++) {
            inner();
        }
    }
    function b() {
        function inner() {
            var x = "Some string";
            console.log(x);
        }
        for (var i = 0; i < 1000; i++) {
            inner();
        }
    }
};
</script>

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a
a();
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b
b();
pending…

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