ironic how to delete node faster

1)
First set provision-state to deleted

$nova delete [vm-id]
$ironic node-set-provision-state [node-id] deleted

Example:
$ironic node-set-provision-state 2d32d1dd-5363-47d4-a5d6-dc3a1fe7f496 deleted

2)
Then delete the node
$ironic node-delete  [node-id]

* This help us to delete node faster