title: strcat() vs sprintf()
body: <p>What would be faster? This:</p>
  
  <pre><code>sprintf(&amp;str[strlen(str)], "Something");
  </code></pre>
  
  <p>or</p>
  
  <pre><code>strcat(str, "Something");
  </code></pre>
  
  <p>Is there any performance difference? </p>