Python | time.monotonic_ns() method

Time module in Python provides various time-related functions. This module comes under Python’s standard utility modules. time.monotonic_ns() method of time module in Python is used to get the value of a monotonic clock in nanoseconds. This method is similar to time.monotonic() method which returns the monotonic clock value in fractional seconds. A monotonic clock is a clock that can not go backwards.

Syntax: time.monotonic_ns() Parameter: No parameter is required. Return type: This method returns an integer value which represents the value of a monotonic clock in nanoseconds.

Code #1: Use of time.monotonic_ns() method to get value of a monotonic clock in nanoseconds 

Value of the monotonic clock (in fractional seconds): 13486.679399824
Value of the monotonic clock (in nanoseconds): 13486679402777

Code #2: Use of time.monotonic_ns() method to measure elapsed time in long running process. 

At the beginning of the process
Value of the monotonic clock (in nanoseconds): 14671301967243 

Factorial of 0: 1
Factorial of 1: 1
Factorial of 2: 2
Factorial of 3: 6
Factorial of 4: 24
Factorial of 5: 120
Factorial of 6: 720
Factorial of 7: 5040
Factorial of 8: 40320
Factorial of 9: 362880

At the end of the process
Value of the monotonic clock (in nanoseconds): 14671302231487
Time elapsed during the process: 264244

Reference: https://docs.python.org/3/library/time.html#time.monotonic_ns