*:focus vs activeElement

JavaScript performance comparison

Test case created by Andy E

Preparation code

<input type="text" id="test" />
<script>
Benchmark.prototype.setup = function() {
    document.getElementById("test").focus();
};
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
querySelector(*:focus)
var focussed = document.querySelector("*:focus");
pending…
document.activeElement
var focussed = document.activeElement.hasFocus && document.activeElement;
pending…

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