Performance of block_order_op_nodes

[samanthavbarron]

The code in this repository is (for the most part) duplicated in qiskit-ibm-runtime, so I'm opening this issue here as well to connect with this issue in qiskit-ibm-provider.

Additionally, as far as I can tell the code doesn't need to be duplicated in both repos, unless there are strange dependency issues that prevent importing one from the other.

qiskit-ibm-provider/qiskit_ibm_provider/transpiler/passes/scheduling/utils.py

Line 29 in 96c3b94

def block_order_op_nodes(dag: DAGCircuit) -> Generator[DAGOpNode, None, None]: