title: Can Ruby handle large hash objects
body: <p>I want to compare two hashes. Each can have more than 20,000 objects.</p>
  
  <p>I have the following questions:</p>
  
  <ul>
  <li>Can Ruby handle such a large amount of objects?</li>
  <li>Will comparing these two hashes take a lot of time?</li>
  <li>Can indexing be applied to reduce enumerations?</li>
  </ul>