Benchmark: getElementById vs. querySelector

HTML Preparation code:

<p id="foo">Foo</p>
<p id="bar">Bar</p>
<p id="baz">Baz</p>

Tests:

getElementById
var bar = document.getElementById("bar");
querySelector
var bar = document.querySelector("#bar");
getElementById or querySelector
var selector = "#bar", func = selector.match('^#[A-z0-9-]*$') ? "getElementById" : "querySelector", bar = document[func]("bar");

Rendered benchmark preparation results:

Previous results

Test case name	Result
getElementById
querySelector
getElementById or querySelector

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.86 Safari/537.36

Browser/OS: Chrome 73 on Windows

Test name	Executions per second
getElementById	4098900.0 Ops/sec
querySelector	2331215.0 Ops/sec
getElementById or querySelector	1832793.0 Ops/sec

getElementById vs. querySelector (version: 0)