Method reset

include/lbann/utils/timer.hpp:106–106

@brief Clear any internal state in the timer. * @post running() returns @c false; check() and stop() return 0. */

   *  @post running() returns @c false; check() and stop() return 0.
   */
  void reset() noexcept { m_start = TimePoint{}; }

  /** @brief Check if the timer is running. */
  bool running() const noexcept { return m_start != TimePoint{}; }