typeof function vs instanceof Function

JavaScript performance comparison

Test case created by Josh

Info

Which is faster (typeof fn == 'function') or (fn instanceof Function) ?

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    this.result = null;
    this.foo = function() {};
};
</script>

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Testing in unknown unknown
Test Ops/sec
typeof
this.result = (typeof this.foo === 'function');
pending…
instanceof
this.result = (this.foo instanceof Function);
pending…

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