FileNamePerformance.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.vfs.perf;

import org.apache.commons.vfs.FileName;
import org.apache.commons.vfs.FileObject;
import org.apache.commons.vfs.FileSystemException;
import org.apache.commons.vfs.FileSystemManager;
import org.apache.commons.vfs.VFS;

public class FileNamePerformance
{
	private final static int NUOF_RESOLVES = 100000;

	public static void main(String[] args) throws FileSystemException
	{
		FileSystemManager mgr = VFS.getManager();

		FileObject root = mgr
				.resolveFile("smb://HOME\\vfsusr:vfs%2f%25\\te:st@10.0.1.54/vfsusr");
		FileName rootName = root.getName();
	
		testNames(mgr, rootName);

		testChildren(root);

		testFiles(mgr);
	}

	private static void testFiles(FileSystemManager mgr) throws FileSystemException
	{
		for (int i = 0; i < 10; i++)
		{
			// warmup jvm
			mgr.resolveFile("smb://HOME\\vfsusr:vfs%2f%25\\te:st@10.0.1.54/vfsusr/many/path/elements/with%25esc/any%25where/to/file.txt");
		}

		long start = System.currentTimeMillis();
		for (int i = 0; i < NUOF_RESOLVES; i++)
		{
			mgr.resolveFile("smb://HOME\\vfsusr:vfs%2f%25\\te:st@10.0.1.54/vfsusr/many/path/elements/with%25esc/any%25where/to/file.txt");
		}
		long end = System.currentTimeMillis();

		System.err.println("time to resolve " + NUOF_RESOLVES + " files: "
				+ (end - start) + "ms");
	}

	private static void testChildren(FileObject root) throws FileSystemException
	{
		for (int i = 0; i < 10; i++)
		{
			// warmup jvm
			root.resolveFile("/many/path/elements/with%25esc/any%25where/to/file.txt");
		}

		long start = System.currentTimeMillis();
		for (int i = 0; i < NUOF_RESOLVES; i++)
		{
			root.resolveFile("/many/path/elements/with%25esc/any%25where/to/file.txt");
		}
		long end = System.currentTimeMillis();

		System.err.println("time to resolve " + NUOF_RESOLVES + " childs: "
				+ (end - start) + "ms");
	}

	private static void testNames(FileSystemManager mgr, FileName rootName) throws FileSystemException
	{
		for (int i = 0; i < 10; i++)
		{
			// warmup jvm
			mgr.resolveName(rootName,
					"/many/path/elements/with%25esc/any%25where/to/file.txt");
		}

		long start = System.currentTimeMillis();
		for (int i = 0; i < NUOF_RESOLVES; i++)
		{
			mgr.resolveName(rootName,
					"/many/path/elements/with%25esc/any%25where/to/file.txt");
		}
		long end = System.currentTimeMillis();

		System.err.println("time to resolve " + NUOF_RESOLVES + " names: "
				+ (end - start) + "ms");
	}
}