title: Elasticsearch Bulk API - Index vs Create/Update
body: <p>I'm using the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html" rel="noreferrer">Elasticsearch Bulk API</a> to create or update documents. </p>
  
  <p>I do actually know if they are creates or updates, but I can simplify my code by just making them all <code>index</code>, or "upserts" in the SQL sense. </p>
  
  <p>Is there any disadvantage in using <code>index</code> (and letting ES figure it out) over using the more explicit <code>create</code> and <code>update</code>?</p>