1 /* 2 * Copyright (C) 2011 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package benchmarks; 18 19 import com.google.caliper.BeforeExperiment; 20 import com.google.caliper.Param; 21 import java.io.BufferedInputStream; 22 import java.io.File; 23 import java.io.FileOutputStream; 24 import java.io.InputStream; 25 import java.util.Random; 26 import java.util.zip.ZipEntry; 27 import java.util.zip.ZipFile; 28 import java.util.zip.ZipOutputStream; 29 30 public final class BufferedZipFileBenchmark { 31 @Param({"128", "1024", "8192", "65536"}) int compressedSize; 32 @Param({"4", "32", "128"}) int readSize; 33 34 private File file; 35 36 @BeforeExperiment 37 protected void setUp() throws Exception { 38 System.setProperty("java.io.tmpdir", "/data/local/tmp"); 39 file = File.createTempFile(getClass().getName(), ".zip"); 40 file.deleteOnExit(); 41 42 Random random = new Random(0); 43 ZipOutputStream out = new ZipOutputStream(new FileOutputStream(file)); 44 byte[] data = new byte[8192]; 45 out.putNextEntry(new ZipEntry("entry.data")); 46 int written = 0; 47 while (written < compressedSize) { 48 random.nextBytes(data); 49 int toWrite = Math.min(compressedSize - written, data.length); 50 out.write(data, 0, toWrite); 51 written += toWrite; 52 } 53 out.close(); 54 } 55 56 public void timeUnbufferedRead(int reps) throws Exception { 57 for (int i = 0; i < reps; i++) { 58 ZipFile zipFile = new ZipFile(file); 59 ZipEntry entry = zipFile.getEntry("entry.data"); 60 InputStream in = zipFile.getInputStream(entry); 61 byte[] buffer = new byte[readSize]; 62 while (in.read(buffer) != -1) { 63 } 64 in.close(); 65 zipFile.close(); 66 } 67 } 68 69 public void timeBufferedRead(int reps) throws Exception { 70 for (int i = 0; i < reps; i++) { 71 ZipFile zipFile = new ZipFile(file); 72 ZipEntry entry = zipFile.getEntry("entry.data"); 73 InputStream in = new BufferedInputStream(zipFile.getInputStream(entry)); 74 byte[] buffer = new byte[readSize]; 75 while (in.read(buffer) != -1) { 76 } 77 in.close(); 78 zipFile.close(); 79 } 80 } 81 } 82
