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.Param;
20 import com.google.caliper.SimpleBenchmark;
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 extends SimpleBenchmark {
31     @Param({"128", "1024", "8192", "65536"}) int compressedSize;
32     @Param({"4", "32", "128"}) int readSize;
33 
34     private File file;
35 
setUp()36     @Override protected void setUp() throws Exception {
37         file = File.createTempFile(getClass().getName(), ".zip");
38         file.deleteOnExit();
39 
40         Random random = new Random(0);
41         ZipOutputStream out = new ZipOutputStream(new FileOutputStream(file));
42         byte[] data = new byte[8192];
43         out.putNextEntry(new ZipEntry("entry.data"));
44         int written = 0;
45         while (written < compressedSize) {
46             random.nextBytes(data);
47             int toWrite = Math.min(compressedSize - written, data.length);
48             out.write(data, 0, toWrite);
49             written += toWrite;
50         }
51         out.close();
52     }
53 
timeUnbufferedRead(int reps)54     public void timeUnbufferedRead(int reps) throws Exception {
55         for (int i = 0; i < reps; i++) {
56             ZipFile zipFile = new ZipFile(file);
57             ZipEntry entry = zipFile.getEntry("entry.data");
58             InputStream in = zipFile.getInputStream(entry);
59             byte[] buffer = new byte[readSize];
60             while (in.read(buffer) != -1) {
61             }
62             in.close();
63             zipFile.close();
64         }
65     }
66 
timeBufferedRead(int reps)67     public void timeBufferedRead(int reps) throws Exception {
68         for (int i = 0; i < reps; i++) {
69             ZipFile zipFile = new ZipFile(file);
70             ZipEntry entry = zipFile.getEntry("entry.data");
71             InputStream in = new BufferedInputStream(zipFile.getInputStream(entry));
72             byte[] buffer = new byte[readSize];
73             while (in.read(buffer) != -1) {
74             }
75             in.close();
76             zipFile.close();
77         }
78     }
79 }
80