That's not the reason for the performance difference. Windows does have a fork primitive (ZwCreateProcess) and it's still slower than Linux's equivalent.

Again, NtCreateProcess does not implement fork(). The fundamental characteristic of fork is that the child is an exact replica of the parent, down to the instruction pointer. Windows does not have a way to create a process object with such a configuration.

Also, using the Zw prefix doesn’t make you look more knowledgeable, it makes you look like you’re trying way too hard to borrow credibility.