What is the procedure of BDC Direct Input Method compare to other methods in BDC? | ABAP BDC

Apart from the CALL transaction and Batch input methods, there is one more method for data transfer which is called the direct input technique especially for transferring large amounts of data. In contrast to batch input, this technique does not create sessions, but stores the data directly into the corresponding database tables. With direct input, the system calls a number of function modules that execute the consistency checks. It does not process screens. However with batch input, these consistency checks are executed with the help of the screens. This means that direct input has considerable performance advantages.