Calculate (Print) Time cost in millisecond on Ansible

playbook.yml

---
- name: Time check
  hosts: all
  gather_facts: true
  tasks:
    - name: Set current time
      ansible.builtin.set_fact:
        start_time: "{{ now().timestamp() | float }}"
    - name: Sleep 3 second
      ansible.builtin.wait_for:
        timeout: 3
    - name: Now time
      ansible.builtin.debug:
        msg: "It costs {{ (now().timestamp() | float) - (start_time | float) }} seconds."
      # "msg": "It costs 3.3215749263763428 seconds."
    - name: Now time with round 3 decimal point
      ansible.builtin.debug:
        msg: "It costs {{ ((now().timestamp() | float) - (start_time | float)) | round(3) }} seconds."
      # "msg": "It costs 3.322 seconds."