If a DTO kind of object is received as Object obj instead of specific class type, then the time taken to receive is very high.

(1)

private static void receiverMethod(Object obj){

/*print time here*/

do something

}

(2)

private static void receiverMethod(specificClass sc) {

do something
}
(1) takes 10 times more time than (2) depending on object size.
any clues?