title: Regex For Anchor Tag Pegging CPU
body: <p>So I have broke my regex in half and found this half is causing the cpu to peg under load.  What are some performance savers I could do to help?  I can't really find any spots to shave off.</p>
  
  <pre><code>private string pattern = 
  @"(&lt;a\s+href\s*=\s*(\""|')http(s)?://(www.)?([a-z0-9]+\-?[a-z0-9]+\.)?wordpress.org(\""|'))";
  
  Regex wordPressPattern = new Regex(regexPattern, RegexOptions.Compiled | RegexOptions.IgnoreCase | RegexOptions.Singleline);
  </code></pre>