Method start

include/lbann/utils/timer.hpp:80–80

@brief Start counting time. * * If the clock is already running, this will restart the counter. * * @post running() returns @c true; stop() or check() will return a * positive value. */

   *        positive value.
   */
  void start() noexcept { m_start = ClockType::now(); }

  /** @brief Get the total elapsed time in seconds.
   *