Are Java static calls more or less expensive than non-static calls?

Question

Is there any performance benefit one way or another? Is it compiler/VM specific? I am using Hotspot.

Answer 1

I would like to add to the other great answers here that it also depends on your flow, for example:

Public class MyDao {

   private String sql = "select * from MY_ITEM";

   public List getAllItems() {
       springJdbcTemplate.query(sql, new MyRowMapper());
   };
};

Pay attention that you create a new MyRowMapper object per each call.
Instead, I suggest to use here a static field.

Public class MyDao {

   private static RowMapper myRowMapper = new MyRowMapper();
   private String sql = "select * from MY_ITEM";

   public List getAllItems() {
       springJdbcTemplate.query(sql, myRowMapper);
   };
};