Run results for: document.body.getElementsByClassName vs document.getElementsByClassName +more el

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser: Chrome 109

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
getElementsByClassName	8709518.0 Ops/sec
body.getElementsByClassName	7149004.0 Ops/sec

HTML Preparation code:

<!DOCTYPE html>
<html lang="ru">
<head>
</head>
<body>
<span class="aap2">AAP</span>
<div class="aap1">AAP<div class="aap3">AAP</div></div>
<div class="aap">AAP<span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span></div>
<div class="aap-tttt">AAP</div>
<div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
  <div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
  <div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
  <span class="aap2">AAP</span>
<div class="aap1">AAP<div class="aap3">AAP</div></div>
<div class="aap">AAP<span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span><span class="aap2">AAP</span></div>
<div class="aap-tttt">AAP</div>
<div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
  <div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
  <div class="aap-ttt">AAP<div class="aap-t">AAP<div class="aap-tt">AAP</div></div></div>
</body>
</html>

Tests:

getElementsByClassName
const classElm = document.getElementsByClassName('aap')[0];
body.getElementsByClassName
const classElm = document.body.getElementsByClassName('aap')[0];