getElementById vs querySelector

JavaScript performance comparison

Test case created by Silver_Clash

Preparation code

<p id="foo">Foo</p>
    

Preparation code output

<p id="foo">Foo</p>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
getElementById
document.getElementById("foo");
pending…
querySelector("#foo")
document.querySelector("#foo");
pending…
querySelector("[id=elem]");
document.querySelector("[id=foo]");
pending…

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Foo