title: ElasticSearch: how min_doc_count affects performance?
body: <p>Why is the time taken of this: </p>
  
  <pre><code>"aggs": {
              "Condition": {
                  "terms": {
                      "field": "color",
                      "size": 10,
                      "min_doc_count": 1
                  }
            }
  </code></pre>
  
  <p>is drastically faster than this:</p>
  
  <pre><code>    "aggs": {
              "Condition": {
                  "terms": {
                      "field": "color",
                      "size": 10,
                      "min_doc_count": 0
                  }
            }
  </code></pre>
  
  <p>Even though they both return the same aggregation result to me?</p>