Difference between Delegates.notNull and lateinit Kotlin

Question

I am very confused both looks and works pretty similar. Which one should I go for?

private var mMediaController by Delegates.notNull

        

Answer 1

• notNull creates an extra object for each property.

• The object is small, but if you have lots of properties, it can be significant for you.

• You can't use the notNull delegate with external injection tools that injects directly to Java fields;

• You can't create a lateinit property of the primitive type (Int, Long, etc).

• lateinit is cheaper, but you can use only the delegate when your property has a primitive type.

Source: https://discuss.kotlinlang.org/t/notnull-delegate-vs-lateinit/1923/2