”It's just an extra indirection in the data member. It's cheap”
That extra indirection often means a cache miss. That isn’t cheap. Accessing each item traversed through a pointer can easily halve program speed.
Java tries hard to prevent the indirections (local objects may live in the stack, their memory layout need not follow what the source code say, objects may even only exist in cpu registers)
That extra indirection often means a cache miss. That isn’t cheap. Accessing each item traversed through a pointer can easily halve program speed.
Java tries hard to prevent the indirections (local objects may live in the stack, their memory layout need not follow what the source code say, objects may even only exist in cpu registers)