When should I use primitives instead of wrapping objects?

Question

Actually here is a similar topic with little practical value. As far as I understand, primitives perform better and should be used everywhere except for the cases where Obje

Answer 1

Primitives are faster when they are used, as objects need to be unboxed before use; thus there is an extra step for the VM to perform. For example, In order perform arithmetic on an Integer, it must first be converted to an int before the arithmetic can be performed.

In many business applications this probably rarely matters. But if you were writing something very numnber-crunching heavy like, say, a graphics transformation processor you are a lot more likely to care.