001/**************************************************************** 002 * Licensed to the Apache Software Foundation (ASF) under one * 003 * or more contributor license agreements. See the NOTICE file * 004 * distributed with this work for additional information * 005 * regarding copyright ownership. The ASF licenses this file * 006 * to you under the Apache License, Version 2.0 (the * 007 * "License"); you may not use this file except in compliance * 008 * with the License. You may obtain a copy of the License at * 009 * * 010 * http://www.apache.org/licenses/LICENSE-2.0 * 011 * * 012 * Unless required by applicable law or agreed to in writing, * 013 * software distributed under the License is distributed on an * 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * 015 * KIND, either express or implied. See the License for the * 016 * specific language governing permissions and limitations * 017 * under the License. * 018 ****************************************************************/ 019 020package org.apache.james.mime4j; 021 022import java.io.ByteArrayInputStream; 023import java.io.ByteArrayOutputStream; 024import java.io.IOException; 025import java.io.InputStream; 026import java.io.OutputStream; 027import java.util.Random; 028 029import org.apache.commons.io.output.NullOutputStream; 030import org.apache.james.mime4j.codec.Base64InputStream; 031import org.apache.james.mime4j.codec.CodecUtil; 032 033public class Base64InputStreamBench { 034 035 public static void main(String[] args) throws Exception { 036 byte[] data = initData(2 * 1024 * 1024); 037 byte[] encoded = encode(data); 038 039 // decoder test to make sure everything is okay 040 041 testDecode(data, encoded); 042 043 // warmup 044 045 OutputStream nullOut = new NullOutputStream(); 046 047 for (int i = 0; i < 5; i++) { 048 ByteArrayInputStream ed = new ByteArrayInputStream(encoded); 049 InputStream in = new Base64InputStream(ed); 050 CodecUtil.copy(in, nullOut); 051 } 052 Thread.sleep(100); 053 054 // test 055 056 long t0 = System.currentTimeMillis(); 057 058 final int repetitions = 50; 059 for (int i = 0; i < repetitions; i++) { 060 ByteArrayInputStream ed = new ByteArrayInputStream(encoded); 061 InputStream in = new Base64InputStream(ed); 062 CodecUtil.copy(in, nullOut); 063 } 064 065 long dt = System.currentTimeMillis() - t0; 066 long totalBytes = data.length * (long) repetitions; 067 068 double mbPerSec = (totalBytes / 1024.0 / 1024) / (dt / 1000.0); 069 070 System.out.println(dt + " ms"); 071 System.out.println(totalBytes + " bytes"); 072 System.out.println(mbPerSec + " mb/sec"); 073 } 074 075 private static byte[] initData(int size) { 076 Random random = new Random(size); 077 byte[] data = new byte[size]; 078 random.nextBytes(data); 079 return data; 080 } 081 082 private static byte[] encode(byte[] data) throws IOException { 083 InputStream in = new ByteArrayInputStream(data); 084 ByteArrayOutputStream out = new ByteArrayOutputStream(); 085 CodecUtil.encodeBase64(in, out); 086 return out.toByteArray(); 087 } 088 089 private static void testDecode(byte[] data, final byte[] encoded) 090 throws IOException { 091 ByteArrayInputStream ed = new ByteArrayInputStream(encoded); 092 InputStream in = new Base64InputStream(ed); 093 ByteArrayOutputStream out = new ByteArrayOutputStream(); 094 CodecUtil.copy(in, out); 095 096 compare(data, out.toByteArray()); 097 } 098 099 private static void compare(byte[] expected, byte[] actual) { 100 if (expected.length != actual.length) 101 throw new AssertionError("length: " + expected.length + ", " 102 + actual.length); 103 104 for (int i = 0; i < expected.length; i++) 105 if (expected[i] != actual[i]) 106 throw new AssertionError("value @ " + i); 107 } 108 109}