Run results for: Selector performance in JQuery 2

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:86.0) Gecko/86.0 Firefox/86.0

Browser: Firefox Mobile 86

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
case-1	91342.7 Ops/sec
case-2	89246.3 Ops/sec
case-3	87521.3 Ops/sec
case-4	31721.5 Ops/sec
case-5	32048.0 Ops/sec
case-6	32555.0 Ops/sec
case-7	31079.3 Ops/sec
case-8	34327.3 Ops/sec

HTML Preparation code:

<div id="my-id">
    <div class="grand">
        <div class="parent"> Awesome stuff! </div>
        <div class="my-class">
            <p> I like carrots! </p>
        </div>
    </div>
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Script Preparation code:

$(' div#my-id div.grand div.parent div.my-class ').css("background-color", "#cccccc"); //case-1
$(' #my-id .grand .parent div.my-class ').css("background-color", "#cccccc"); //case-2
$(' #my-id .grand .parent .my-class ').css("background-color", "#cccccc"); //case-3
$(' div#my-id div.my-class ').css("background-color", "#cccccc"); //case-4
$(' #my-id div.my-class ').css("background-color", "#cccccc"); //case-5
$(' #my-id .my-class ').css("background-color", "#cccccc"); //case-6
$(' div.my-class ').css("background-color", "#cccccc"); //case-7
$(' .my-class ').css("background-color", "#cccccc"); //case-8

Tests:

case-1
$(' div#my-id div.grand div.parent div.my-class ').css("background-color", "#cccccc");
case-2
$(' #my-id .grand .parent div.my-class ').css("background-color", "#cccccc");
case-3
$(' #my-id .grand .parent .my-class ').css("background-color", "#cccccc");
case-4
$(' div#my-id div.my-class ').css("background-color", "#cccccc");
case-5
$(' #my-id div.my-class ').css("background-color", "#cccccc");
case-6
$(' #my-id .my-class ').css("background-color", "#cccccc");
case-7
$(' div.my-class ').css("background-color", "#cccccc");
case-8
$(' .my-class ').css("background-color", "#cccccc");