Comment by chaz72
4 hours ago
My guess is that one of these (Andrew) is measuring syscalls and the other is measuring vtable indirections.
4 hours ago
My guess is that one of these (Andrew) is measuring syscalls and the other is measuring vtable indirections.
A vtable indirection is essentially free when you're going to perform a syscall. What matters is that the buffer is above the vtable (which is already the case for the current implementation) so that you don't pay for the indirection when hitting the buffer.