Is this poor coding?

I want my wordpress site running smoothly and I heard that poor coding can slow it down. The code I've put in sidebar-page.php is <div class="bgsidebar"> under the php code.

<div id="sidebar" class="col-right">

	<?php dynamic_sidebar('sidebar-page'); ?>		           
    
</div><!-- /#sidebar -->
<div class="bgsidebar"></div>

If this isnt a good idea could somebody help me out on this. I'd really appreciate it. Thank you