public long timeMillis(){
  return ((_perf.highResCounter() * TO_MILLISECONDS) / TICKS_PER_SECOND);
}

public long timeMillis ( ) { return ( ( _perf . highResCounter ( ) * TO_MILLISECONDS ) / TICKS_PER_SECOND ) ; }
returns the current value of the most precise available system timer , in milliseconds . this method is used to measure elapsed time and is not related to any other notion of system or wall - clock time .
