It is possible to trigger DAG in few millisecond/micro/nano

I need to trigger DAG and job done with in millisecond / microscecond , is it possible?
Right now DAG take at least 2 second to complete simple task.

Well, depending on what you consider as the start and finish of the execution.

The actual execution of the execution method can be as short as it takes to finish execution.

The timestamp stored as the start_date and end_date does include time of other procedures in Airflow.