title: Solr Query Performance between with and without q=*:*
body: <p>Could anyone explain me if there are diff in performance between these 2 queries ?</p>
  
  <pre><code>q=field1:xxx
  </code></pre>
  
  <p>and </p>
  
  <pre><code>q=*:*&amp;fq=field1:xxx
  </code></pre>
  
  <p>Also, it would be good if you know about documents for Solr performance turning and post them here.</p>
  
  <p>Thanks, </p>