Information

• Qiskit Terra version: latest
• Python version:
• Operating system:

What is the current behavior?

qc = QuantumCircuit(1)
qc.y(0)
transpile(qc,backend).draw()

gives:

global phase: -π/2
                 ┌────┐┌────┐┌───────┐
        q_0 -> 0 ┤ √X ├┤ √X ├┤ RZ(π) ├
                 └────┘└────┘└───────┘

which is twice as long in duration as directly using x since both sx and x have the same duration on the backend.

Steps to reproduce the problem

What is the expected behavior?

Suggested solutions

Perhaps x goes before sx in the basis gates?