title: Does single-field index limitation applies to compound indexes too?
body: <p>I'm using Firebase Cloud Firestore for my project and stumbled in this limitation:</p>
  
  <blockquote>
    <p>Maximum write rate to a collection in which documents contain sequential values in an indexed field: 500 per second</p>
  </blockquote>
  
  <p>I understand the limitation based on this <a href="https://stackoverflow.com/questions/46567076/a-limit-clarification-for-the-new-firestore">answer.</a>
  But if I disabled auto single-field indexes in firebase console, and only use this fields in compound indexes, this limitation still continues? I mean, does this single-field index limitation extends to compound indexes?</p>
  
  <p>Thanks.</p>