tagName vs. instanceof

JavaScript performance comparison

Test case created by diegohaz

Preparation code

<a href="#" id="anchor">Anchor</a>
      
<script>
Benchmark.prototype.setup = function() {
  const anchor = document.getElementById("anchor");

};
</script>

Preparation code output

<a href="#" id="anchor">Anchor</a>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
tagName
if (anchor.tagName === "A") {}
pending…
instanceof
if (anchor instanceof HTMLAnchorElement) {}
pending…

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Anchor