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/*
* Copyright (C) 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package benchmarks;
import com.google.caliper.Param;
import com.google.caliper.SimpleBenchmark;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Random;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
public final class BufferedZipFileBenchmark extends SimpleBenchmark {
@Param({"128", "1024", "8192", "65536"}) int compressedSize;
@Param({"4", "32", "128"}) int readSize;
private File file;
@Override protected void setUp() throws Exception {
file = File.createTempFile(getClass().getName(), ".zip");
file.deleteOnExit();
Random random = new Random(0);
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(file));
byte[] data = new byte[8192];
out.putNextEntry(new ZipEntry("entry.data"));
int written = 0;
while (written < compressedSize) {
random.nextBytes(data);
int toWrite = Math.min(compressedSize - written, data.length);
out.write(data, 0, toWrite);
written += toWrite;
}
out.close();
}
public void timeUnbufferedRead(int reps) throws Exception {
for (int i = 0; i < reps; i++) {
ZipFile zipFile = new ZipFile(file);
ZipEntry entry = zipFile.getEntry("entry.data");
InputStream in = zipFile.getInputStream(entry);
byte[] buffer = new byte[readSize];
while (in.read(buffer) != -1) {
}
in.close();
zipFile.close();
}
}
public void timeBufferedRead(int reps) throws Exception {
for (int i = 0; i < reps; i++) {
ZipFile zipFile = new ZipFile(file);
ZipEntry entry = zipFile.getEntry("entry.data");
InputStream in = new BufferedInputStream(zipFile.getInputStream(entry));
byte[] buffer = new byte[readSize];
while (in.read(buffer) != -1) {
}
in.close();
zipFile.close();
}
}
}
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