Test case details

Preparation Code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script> <div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div><div class="el"></div> <script>   var i = 0,       $el = $('.el'); </script>

Test cases

Test #1

$.data('.el', 'key-' + Math.floor(Math.random() * 1001), 'val-' + Math.floor(Math.random() * 1001));

Test #2

$el.data('key-' + Math.floor(Math.random() * 1001), 'val-' + Math.floor(Math.random() * 1001));