[ros-users] [Discourse.ros.org] [Next Generation ROS] ROS 2 Time vs std::chrono

[Sloretz]

Is it important for your product to support being used by two nodes in the same process at the same time?

If `rclcpp` used [std::chrono](https://en.cppreference.com/w/cpp/named_req/Clock) then there could only be one clock per clock type per process. If a process with two nodes starts and a user sets `use_sim_time` to `true` on one node and `false` on the other then what time should `ros2_clock::now()` return?





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