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std::chrono::steady_clock(3)  C++ Standard Libary std::chrono::steady_clock(3)

NAME
       std::chrono::steady_clock - std::chrono::steady_clock

Synopsis
	  Defined in header <chrono>
	  class	steady_clock;	      (since C++11)

	  Class	 std::chrono::steady_clock  represents	a monotonic clock. The
       time points of
	  this clock cannot decrease as	physical time moves  forward  and  the
       time between ticks
	  of  this  clock is constant. This clock is not related to wall clock
       time (for
	  example, it can be time since	last reboot), and is most suitable for
       measuring
	  intervals.

	  std::chrono::steady_clock meets the requirements of TrivialClock.

Member types
	  Member type Definition
	  rep	      arithmetic type representing the number of ticks in  the
       clock's duration
	  period       a  std::ratio  type representing	the tick period	of the
       clock, in seconds
	  duration    std::chrono::duration<rep, period>
	  time_point  std::chrono::time_point<std::chrono::steady_clock>

Member constants
	  constexpr bool is_steady steady clock	flag, always true
	  [static]		   (public static member constant)

Member functions
	  now	   returns a time_point	representing the current value of  the
       clock
	  [static] (public static member function)

See also
	  system_clock		 wall clock time from the system-wide realtime
       clock
	  (C++11)		(class)
	  high_resolution_clock	the clock with the shortest tick period	avail-
       able
	  (C++11)		(class)

http://cppreference.com		  2022.07.31	  std::chrono::steady_clock(3)

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