I am a little rusty on this but rotations around the z axis on a Bloch sphere can be implemented by either detuning the qubit frequency with respect to the driv

I am a little rusty on this but rotations around the z axis on a Bloch sphere can be implemented by either detuning the qubit frequency with respect to the drive field(real z gate) or as a composition of X and Y gates when introducing a phase offset in the field with respect to those gates(virtual z), which is why it takes no time since it's implicitly part of the other operations.