source: doc/theses/andrew_beach_MMath/code/ThrowEmpty.java @ dacd2c19

// Throw Across Empty Function

class EmptyException extends Exception {}

public class ThrowEmpty {
        static void unwind_empty(int frames) throws EmptyException {
                if (0 < frames) {
                        unwind_empty(frames - 1);
                } else {
                        throw new EmptyException();
                }
        }

        private static long loop(int times, int total_frames) {
                long startTime = System.nanoTime();
                for (int count = 0 ; count < times ; ++count) {
                        try {
                                unwind_empty(total_frames);
                        } catch (EmptyException e) {
                                // ...
                        }
                }
                long endTime = System.nanoTime();
                return endTime - startTime;
        }

        public static void main(String[] args) {
                int times = 1;
                int total_frames = 1;
                if (0 < args.length) {
                        times = Integer.parseInt(args[0]);
                }
                if (1 < args.length) {
                        total_frames = Integer.parseInt(args[1]);
                }

                // Warm-Up:
                loop(1000, total_frames);

                long time = loop(times, total_frames);
                System.out.format("Run-Time (s): %.1f%n", time / 1_000_000_000.);
        }
}