Run results for: JQuery version speed test jQuery 3.4.0

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0

Browser: Firefox 69

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Test jQuery 1.12.0	11901.8 Ops/sec
Test jQuery 2.2.4	14517.4 Ops/sec
Test jQuery 3.3.1	14518.2 Ops/sec
Test jQuery 3.4.0	14215.3 Ops/sec

HTML Preparation code:

<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js'></script>
<script>
  var $jq1120 = $.noConflict(true);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script>
  var $jq224 = $.noConflict(true);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
  var $jq331 = $.noConflict(true);
</script>
<script src="https://code.jquery.com/jquery-3.4.0.min.js"></script>
<script>
  var $jq340 = $.noConflict(true);
</script>
<div>
  <ul id="menu">
    <li class="menu-item">1</li>
    <li class="menu-item">2</li>
    <li class="menu-item">3</li>
    <li class="menu-item">4</li>  
  </ul>
</div>

Script Preparation code:

function tests($) {
    $(".menu-item").eq(2).closest("ul").css({
      "background-color": "red"
    }).parent().css({
      "border": "1px solid blue"
    }).append($("<p></p>").text("Text.").css({
      "background-color": "green"
    })).end().end().remove();
  console.log('tests' + $);
}

Tests:

Test jQuery 1.12.0
tests($jq1120);
Test jQuery 2.2.4
tests($jq224);
Test jQuery 3.3.1
tests($jq331);
Test jQuery 3.4.0
tests($jq340);

Run results for: JQuery version speed test jQuery 3.4.0

JQuery version speed test

Test jQuery 1.12.0

Test jQuery 2.2.4

Test jQuery 3.3.1

Test jQuery 3.4.0