Preparation code

<ul>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#" /></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
  <li>
    <a href="#"><img src="#"/></a>
  </li>
</ul>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
  Benchmark.prototype.setup = function() {
    $(".active").removeClass("active");
    var elem1 = $("li a").eq(4)[0],
        elem2 = $("li").eq(4)[0];
  };
</script>

Preparation code output

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$(elem1).addClass('active').parent().addClass('active').end().children().addClass('active')

$(elem2).find('a,img').add(elem2).addClass('active');

$(elem1).parent().addClass('active');
$(elem1).children().addClass('active');
$(elem1).addClass('active');

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