title: All Macros Run Extremely Slow After Workbook Buildout. Recommended trouble shooting procedure?
body: <p>I've been building out an Excel workbook that is offered by Interactive Brokers for API trade Execution.  Over the last few years I've been adding sheets that include new automated trade strategies.  </p>
  
  <p>Now the workbook is at a point where Macros that take less than a second to run on previous versions of the modified workbook that I have been building out take 15 seconds or even longer.  I've spent a lot of time trying to find the source of the problem.  </p>
  
  <ul>
  <li>I've deleted sheets</li>
  <li>I've deleted code from each sheet</li>
  <li>I've removed conditional formating, any and all Index, vlookup or like functions   </li>
  </ul>
  
  <p>I can not find the source of the problem.  </p>
  
  <p>If anyone has any suggestions on what else to try it would be greatly appreciated.</p>
  
  <p><a href="https://www.interactivebrokers.com/en/index.php?f=5041" rel="nofollow noreferrer">If it's relevant the API sample excel file (which I've built out) van be found here</a></p>