Run results for: afdgdfdgfsnhjbzzz

Run details:
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0
Browser: Firefox 62
Operating system: Windows
Device Platform: Desktop
Date tested: 4 years ago
Test name	Executions per second
a	84312.0 Ops/sec
b	23769.3 Ops/sec
c	34476.5 Ops/sec
d	77212.0 Ops/sec
e	4201.9 Ops/sec
HTML Preparation code:
<div class="agent-interface">
	<div class="main-header">
		<div class="logo-con">
			<img src="images/talklogo.png" class="logo">
		</div>
		<div class="nav-con" data-tab-group="main-tabs">
			<div class="nav-item"><span class="label">Customer</span></div>
			<div class="nav-item"><span class="label">Script</span></div>
			<div class="nav-item"><span class="label">Form</span></div>
			<div class="nav-item"><span class="label">Email</span><span class="tag">25</span></div>
			<div class="nav-item"><span class="label">Internal Chat</span><span class="tag">8</span></div>
			<div class="nav-item"><span class="label">Customer Chat</span><span class="tag">4</span></div>
			<div class="nav-item"><span class="label">Agents</span></div>
		</div>
		<div class="login-con d-none d-xl-flex">
			<div class="login-item">
				<div class="label">Campaign:</div>
				<div class="data">JIC00001</div>
			</div>
			<div class="login-item">
				<div class="label">Phone:</div>
				<div class="data">
					<span>SIP/12345</span>
					<i class="ring-btn fas fa-phone-square fa-flip-horizontal" title="Ring Phone"></i>
				</div>
			</div>
			<div class="login-item">
				<div class="label">Session:</div>
				<div class="data">8600051</div>
			</div>
		</div>
		<div class="user-main">
			<div class="btn-group dropdown-group">
				<button class="user-account btn btn-neutral-white dropdown-toggle">
					<i class="fas fa-user"></i>
					<span>12345</span>
				</button>
				<div class="dropdown-menu px-2 py-2 open-bottom-end">
					<div class="login-con-alt d-flex d-xl-none">
						<div class="login-item">
							<div class="label">Campaign:</div>
							<div class="data">JIC00001</div>
						</div>
						<div class="login-item">
							<div class="label">Phone:</div>
							<div class="data">
								<i class="d-none ring-btn fas fa-phone-square fa-flip-horizontal" title="Ring Phone"></i>
								<span>SIP/12345</span>
							</div>
						</div>
						<div class="login-item">
							<div class="label">Session:</div>
							<div class="data">8600051</div>
						</div>
						<hr class="my-2">
					</div>
					<a href="#" class="dropdown-item close-dropdown">
						<i class="fas fa-users"></i>
						<span>Modify Groups</span>
					</a>
					<a href="#" class="dropdown-item close-dropdown">
						<i class="fas fa-map-marked-alt"></i>
						<span>Modify Territories</span>
					</a>
					<hr class="my-2">
					<button class="btn btn-block btn-danger close-dropdown">
						<i class="far fa-sign-out mr-1"></i>
						<span>Logout</span>
					</button>
				</div>
			</div>
		</div>
	</div>
	<div class="content d-flex flex-fill-0" id="connie" style="min-height:0">
		<div class="main-sidebar d-flex flex-column" style="width:240px; overflow-y:auto;">
			<div class="call-info-section">
				<div class="call-status active">
					<i class="icon i i-call-active"></i>
					<div class="info">
						<span class="number">(800)330-5349</span>
						<span class="duration">00:00:32</span>
					</div>
				</div>
				<div class="call-info">
					<span class="label">Calling:</span>
					<span class="data">(800)330-5349</span>
				</div>
				<div class="call-info">
					<span class="label">Duration:</span>
					<span class="data">00:00:00</span>
				</div>
				<div class="call-info">
					<span class="label">Dialable Leads:</span>
					<span class="data">16</span>
				</div>
				<div class="call-info">
					<span class="label">List ID:</span>
					<span class="data">82106</span>
				</div>
				<div class="call-info">
					<span class="label">Lead ID:</span>
					<span class="data">14344</span>
				</div>
				<div class="call-info">
					<span class="label">UID:</span>
					<span class="data">M9110524260000002330</span>
				</div>
			</div>
			<div class="in-call-tools">
				<div class="group1">
					
				</div>
				<div class="group2"></div>
				<div class="group3"></div>
				<div class="group4"></div>
			</div>
			<div class="call-settings"></div>
		</div>
		<div class="d-flex flex-column flex-fill-0">
			<div class="d-flex flex-fill-0" style="min-height:0">
				<div class="main-content flex-fill-0" style="overflow-y:auto;" data-fill="0">
					<div class="customer-panel">
						<div class="customer-tab p-3">
							<button class="btn btn-default">Default</button>
							<button class="btn btn-primary">Primary</button>
							<button class="btn btn-success">Success</button>
							<button class="btn btn-warning">Warning</button>
							<button class="btn btn-notif">Notif</button>
							<button class="btn btn-danger">Danger</button>
							<button class="btn btn-info">Info</button>
							<button class="btn btn-secondary">Secondary</button>
							<button class="btn btn-light">Light</button>
							<button class="btn btn-dark">Dark</button>
							<hr>
							<style>
								.dropper{display: inline-block;}
								.dropper + .dropper{margin-left:10px}
							</style>
							<div class="dynamic" id="dyna">
								<div class="dropdown-group dropper">
									<a href="#" class="dropdown-toggle">holla</a>
									<div class="dropdown-menu">
										<span class="text">hello world</span>
										<button class="btn btn-sm btn-secondary dropdown-close">close</button>
									</div>
								</div>
							</div>
							<hr>
							<button class="btn btn-danger cloner">Clone This Mutha!</button>
							<button class="btn btn-purple cloner2">Generate from JS!</button>
							<hr>
							<label class="form-file mb-2">
								<input type="file" class="form-control" multiple>
								<span></span>
							</label>
							<input type="text" class="form-control mb-2">
							<label class="form-toggle mb-2">
								<input type="checkbox" class="form-control">
								<span data-fill="20"></span>
							</label>
							<input type="text" class="form-control mb-2">
						</div>
						<div class="more-info-tab"></div>
					</div>
					<div class="script-panel"></div>
					<div class="form-panel"></div>
					<div class="email-panel"></div>
					<div class="chat-in-panel"></div>
					<div class="chat-out-panel"></div>
				</div>
				<div class="agents-panel" style="width:200px; overflow-y:auto;" data-fill="500"></div>
			</div>
			<div class="calls-panel" data-fill="1000" style="max-height:200px; overflow-y:auto"></div>
			<div class="main-footer">
				Copyright &copy; 2019 Asia Pacific Network, Corp.
			</div>
		</div>
	</div>
</div>






<div class="main-sidebar p-4">
	<div class="btn-group">
		<button class="btn btn-sb-yellow">PAUSED: YOSI</button>
		<button class="btn btn-sb-yellow"><i class="fas fa-plus"></i></button>
	</div>
	<br><br>
	<button class="btn btn-sb-red">btn-sb-red</button>
	<button class="btn btn-sb-default active-red">btn-sb-default</button>
	<button class="btn btn-sb-default active-red active">btn-sb-red-o active</button>
	<br><br>
	<button class="btn btn-sb-gray">btn-sb-gray</button>
	<button class="btn btn-sb-green">btn-sb-green</button>
	<button class="btn btn-sb-yellow">btn-sb-yellow</button>
	<button class="btn btn-sb-red">btn-sb-red</button>
	<button class="btn btn-sb-orange">btn-sb-orange</button>
	<button class="btn btn-sb-blue">btn-sb-blue</button>
	<br><br>
	<button class="btn btn-sb-default active-green active">btn-sb-green-o active</button>
	<button class="btn btn-sb-default active-yellow active">btn-sb-yellow-o active</button>
	<button class="btn btn-sb-default active-red active">btn-sb-red-o active</button>
	<button class="btn btn-sb-default active-orange active">btn-orange-red-o active</button>
	<button class="btn btn-sb-default active-blue active">btn-sb-blue-o active</button>
	<br><br>
	<span class="call-status green-status">Active Call</span>
	<span class="call-status gray-status">No Active Call</span>
	<span class="call-status red-status">Call Ended</span>
</div>

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>
Tests:
a
$(".customer-panel").find(".btn")
b
$(".customer-panel .btn")
c
document.querySelectorAll(".customer-panel .btn")
d
$(".btn", ".customer-panel")
e
$(".btn").filter(function(){ return $(this).closest(".customer-panel").length });