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/*
* Copyright 2007 - 2018 ETH Zuerich, CISD and SIS.
*
* 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 ch.systemsx.cisd.hdf5;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import hdf.hdf5lib.exceptions.HDF5LibraryException;
import ch.systemsx.cisd.hdf5.IHDF5WriterConfigurator.SyncMode;
/**
* @author Bernd Rinn
*/
public class HDF5SpeedTest
{
public static void main(String[] args)
{
final float[] arr = new float[1000000];
for (int i = 0; i < arr.length; ++i)
{
arr[i] = (float) Math.random();
}
long start = System.currentTimeMillis();
final File f1 = new File("speedtest.jo");
try
{
for (int i = 0; i < 20; ++i)
{
f1.delete();
final ObjectOutputStream s = new ObjectOutputStream(new FileOutputStream(f1));
s.writeObject(arr);
s.close();
}
} catch (Exception ex)
{
ex.printStackTrace();
}
final float twj = (System.currentTimeMillis() - start) / 1000.f;
System.out.printf("Write Java Serialization: %.2f s\n", twj);
final File f2 = new File("speedtest.h5");
f2.delete();
start = System.currentTimeMillis();
try
{
for (int i = 0; i < 20; ++i)
{
f2.delete();
final IHDF5Writer writer =
HDF5FactoryProvider.get().configure(f2).syncMode(SyncMode.NO_SYNC).writer();
writer.float32().writeArray("/f", arr);
writer.close();
}
} catch (HDF5LibraryException ex)
{
System.err.println(ex.getHDF5ErrorStackAsString());
}
final float twh = (System.currentTimeMillis() - start) / 1000.f;
System.out.printf("Write HDF5: %.2f s (%.2f %%)\n", twh, 100.0 * twh / twj);
start = System.currentTimeMillis();
try
{
for (int i = 0; i < 20; ++i)
{
final ObjectInputStream s = new ObjectInputStream(new FileInputStream(f1));
s.readObject();
s.close();
}
} catch (Exception ex)
{
ex.printStackTrace();
}
final float trj = (System.currentTimeMillis() - start) / 1000.f;
System.out.printf("Read Java Serialization: %.2f s\n", trj);
start = System.currentTimeMillis();
try
{
for (int i = 0; i < 20; ++i)
{
final IHDF5Reader reader =
HDF5FactoryProvider.get().configureForReading(f2).reader();
reader.float32().readArray("/f");
reader.close();
}
} catch (HDF5LibraryException ex)
{
System.err.println(ex.getHDF5ErrorStackAsString());
}
final float trh = (System.currentTimeMillis() - start) / 1000.f;
System.out.printf("Read HDF5: %.2f s (%.2f %%)\n", trh, 100.0 * trh / trj);
}
}
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