[6785] | 1 | /**************************************************************** |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one * |
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| 3 | * or more contributor license agreements. See the NOTICE file * |
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| 4 | * distributed with this work for additional information * |
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| 5 | * regarding copyright ownership. The ASF licenses this file * |
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| 6 | * to you under the Apache License, Version 2.0 (the * |
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| 7 | * "License"); you may not use this file except in compliance * |
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| 8 | * with the License. You may obtain a copy of the License at * |
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| 9 | * * |
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| 10 | * http://www.apache.org/licenses/LICENSE-2.0 * |
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| 11 | * * |
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| 12 | * Unless required by applicable law or agreed to in writing, * |
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| 13 | * software distributed under the License is distributed on an * |
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| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * |
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| 15 | * KIND, either express or implied. See the License for the * |
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| 16 | * specific language governing permissions and limitations * |
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| 17 | * under the License. * |
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| 18 | ****************************************************************/ |
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| 19 | |
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| 20 | package org.apache.james.mime4j; |
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| 21 | |
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| 22 | import java.io.ByteArrayInputStream; |
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| 23 | import java.io.ByteArrayOutputStream; |
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| 24 | import java.io.IOException; |
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| 25 | import java.io.InputStream; |
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| 26 | import java.io.OutputStream; |
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| 27 | import java.util.Random; |
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| 28 | |
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| 29 | import org.apache.commons.io.output.NullOutputStream; |
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| 30 | import org.apache.james.mime4j.codec.Base64InputStream; |
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| 31 | import org.apache.james.mime4j.codec.CodecUtil; |
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| 32 | |
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| 33 | public class Base64InputStreamBench { |
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| 34 | |
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| 35 | public static void main(String[] args) throws Exception { |
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| 36 | byte[] data = initData(2 * 1024 * 1024); |
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| 37 | byte[] encoded = encode(data); |
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| 38 | |
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| 39 | // decoder test to make sure everything is okay |
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| 40 | |
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| 41 | testDecode(data, encoded); |
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| 42 | |
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| 43 | // warmup |
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| 44 | |
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| 45 | OutputStream nullOut = new NullOutputStream(); |
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| 46 | |
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| 47 | for (int i = 0; i < 5; i++) { |
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| 48 | ByteArrayInputStream ed = new ByteArrayInputStream(encoded); |
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| 49 | InputStream in = new Base64InputStream(ed); |
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| 50 | CodecUtil.copy(in, nullOut); |
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| 51 | } |
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| 52 | Thread.sleep(100); |
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| 53 | |
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| 54 | // test |
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| 55 | |
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| 56 | long t0 = System.currentTimeMillis(); |
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| 57 | |
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| 58 | final int repetitions = 50; |
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| 59 | for (int i = 0; i < repetitions; i++) { |
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| 60 | ByteArrayInputStream ed = new ByteArrayInputStream(encoded); |
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| 61 | InputStream in = new Base64InputStream(ed); |
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| 62 | CodecUtil.copy(in, nullOut); |
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| 63 | } |
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| 64 | |
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| 65 | long dt = System.currentTimeMillis() - t0; |
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| 66 | long totalBytes = data.length * (long) repetitions; |
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| 67 | |
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| 68 | double mbPerSec = (totalBytes / 1024.0 / 1024) / (dt / 1000.0); |
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| 69 | |
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| 70 | System.out.println(dt + " ms"); |
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| 71 | System.out.println(totalBytes + " bytes"); |
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| 72 | System.out.println(mbPerSec + " mb/sec"); |
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| 73 | } |
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| 74 | |
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| 75 | private static byte[] initData(int size) { |
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| 76 | Random random = new Random(size); |
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| 77 | byte[] data = new byte[size]; |
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| 78 | random.nextBytes(data); |
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| 79 | return data; |
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| 80 | } |
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| 81 | |
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| 82 | private static byte[] encode(byte[] data) throws IOException { |
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| 83 | InputStream in = new ByteArrayInputStream(data); |
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| 84 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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| 85 | CodecUtil.encodeBase64(in, out); |
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| 86 | return out.toByteArray(); |
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| 87 | } |
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| 88 | |
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| 89 | private static void testDecode(byte[] data, final byte[] encoded) |
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| 90 | throws IOException { |
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| 91 | ByteArrayInputStream ed = new ByteArrayInputStream(encoded); |
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| 92 | InputStream in = new Base64InputStream(ed); |
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| 93 | ByteArrayOutputStream out = new ByteArrayOutputStream(); |
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| 94 | CodecUtil.copy(in, out); |
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| 95 | |
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| 96 | compare(data, out.toByteArray()); |
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| 97 | } |
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| 98 | |
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| 99 | private static void compare(byte[] expected, byte[] actual) { |
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| 100 | if (expected.length != actual.length) |
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| 101 | throw new AssertionError("length: " + expected.length + ", " |
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| 102 | + actual.length); |
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| 103 | |
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| 104 | for (int i = 0; i < expected.length; i++) |
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| 105 | if (expected[i] != actual[i]) |
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| 106 | throw new AssertionError("value @ " + i); |
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| 107 | } |
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| 108 | |
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| 109 | } |
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