which one is more memory efficient?
which one works faster with 1000000 items?
is there anything better?
which one is more memory efficient? which one works faster with 1000000 items? is
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which one is more memory efficient?
which one works faster with 1000000 items?
is there anything better?
A
List<T>is generally preferable to using anArrayListbecause it is a type safe collection. This means that you get build time type safety. It is also more memory efficient for value types because entries in anArrayListwill be boxed because its a list of type object:eg: Adding an integer to a
List<int>will put the data on the heap using anint[]as the underlying data structure. Adding an integer to anArrayListwill put the data on the heap, but because the underlying data structure is anobject[], the data has to be boxed which means a pointer also has to be stored on the heap which requires more memory to be allocated.The memory allocation for an
ArrayListand aList<T> : class(a list of reference types) is exactly the same.