Info

See: Safest way to detect native DOM element?

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    var isElementInstance = function(ukn) {
        return ukn instanceof Element;
    };
    var isElementNode = function(ukn) {
        return 1 === ukn.nodeType;
    };
    var body = document.body;
  };
</script>

Test runner

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isElementInstance(body);

isElementNode(body);

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