How long does a query?q=field1:2312 should cost? exactly hit one document.

[zhenyuan wei]

Hi ，
   I am curious “How long does a  query q=field1:2312 cost ,   which
exactly match only one document? ”，  Of course we just discuss  no
 queryResultCache with match in this situation.
   In fact  my QTime is  150ms+， it is too long.