Class Benchmark

src/Benchmark.java:13–193

import java.util.Random;

public class Benchmark {
	interface IntWriter {
		void write(int[] ints);
	}

	public static final int NUM_INTS = 1000000;
	public static final int NUM_TESTS = 3;
	public static final String[] TESTS = { "Buffered DataOutputStream", "DataOutputStream", "ObjectOutputStream",
			"FileChannel alt" };

	public static void main(String[] args) {
		// create buffer
		int[] ints = new int[NUM_INTS];
		Random r = new Random();
		for (int i = 0; i < NUM_INTS; i++)
			ints[i] = r.nextInt();

		// run tests
		double[][] results = new double[TESTS.length][NUM_TESTS];

		System.out.print("Running tests... ");
		for (int i = 0; i < NUM_TESTS; i++) {
			System.out.print(i + " ");

			results[0][i] = time("Buffered DataOutputStream", new IntWriter() {
				public void write(int[] ints) {
					storeBDO(ints);
				}
			}, ints);

			results[1][i] = time("DataOutputStream", new IntWriter() {
				public void write(int[] ints) {
					storeDO(ints);
				}
			}, ints);

			results[2][i] = time("ObjectOutputStream", new IntWriter() {
				public void write(int[] ints) {
					storeOO(ints);
				}
			}, ints);

			results[3][i] = time("FileChannel alt", new IntWriter() {
				public void write(int[] ints) {
					storeFCAlt(ints);
				}
			}, ints);
		}
		System.out.println();

		// print results
		for (int i = 0; i < TESTS.length; i++) {
			System.out.print(TESTS[i] + "\t");
			for (int j = 0; j < NUM_TESTS; j++) {
				System.out.print(results[i][j] + "\t");
			}
			System.out.println();
		}