Run results for: jQuery 3.5 versus 1.12.4

Run details:

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:87.0) Gecko/20100101 Firefox/87.0

Browser: Firefox 87

Operating system: Windows 8.1

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
1.12.4	17682.3 Ops/sec
3.3.1	21744.1 Ops/sec
3.4	22307.5 Ops/sec
3.5	21561.0 Ops/sec

HTML Preparation code:

<script src='https://code.jquery.com/jquery-1.12.4.min.js'></script>
<script>
  var $jq1124 = $.noConflict(true);
</script>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script>
  var $jq331 = $.noConflict(true);
</script>
<script src="https://code.jquery.com/jquery-3.4.0.min.js"></script>
<script>
  var $jq34 = $.noConflict(true);
</script>
<script src="https://code.jquery.com/jquery-3.5.0.min.js"></script>
<script>
  var $jq35 = $.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:

1.12.4
tests($jq1124);
3.3.1
tests($jq331);
3.4
tests($jq34);
3.5
tests($jq35);