com.cedarsoft.serialization.SplittingPerformanceRunner.java Source code

Introduction

Here is the source code for com.cedarsoft.serialization.SplittingPerformanceRunner.java

Source

/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.serialization;

import com.google.common.base.Splitter;
import org.apache.commons.lang.time.StopWatch;

import javax.annotation.Nonnull;
import java.util.Iterator;
import java.util.concurrent.Callable;

import static org.junit.Assert.*;

/**
 *
 */
public class SplittingPerformanceRunner {
    @Nonnull
    public static final Splitter SPLITTER = Splitter.on("/");
    public static final Splitter DOT_SPLITTER = Splitter.on(".");

    public static void main(String[] args) throws Exception {
        final String uri = "http://www.cedarsoft.com/some/slashes/1.0.0";

        run("String.plit", new Callable<String>() {
            @Override
            public String call() throws Exception {
                String[] parts = uri.split("/");
                return parts[parts.length - 1];
            }
        });

        run("Splitter", new Callable<String>() {
            @Override
            public String call() throws Exception {
                Splitter splitter = Splitter.on("/");
                Iterable<String> parts = splitter.split(uri);

                Iterator<String> iterator = parts.iterator();
                while (true) {
                    String current = iterator.next();
                    if (!iterator.hasNext()) {
                        return current;
                    }
                }
            }
        });

        run("static Splitter", new Callable<String>() {
            @Override
            public String call() throws Exception {
                Iterable<String> parts = SPLITTER.split(uri);

                Iterator<String> iterator = parts.iterator();
                while (true) {
                    String current = iterator.next();
                    if (!iterator.hasNext()) {
                        return current;
                    }
                }
            }
        });

        run("indexOf", new Callable<String>() {
            @Override
            public String call() throws Exception {
                int index = uri.lastIndexOf("/");
                return uri.substring(index + 1);
            }
        });
    }

    private static void run(@Nonnull String description, @Nonnull Callable<String> callable) throws Exception {
        //Warmup
        for (int i = 0; i < 1000; i++) {
            assertEquals("1.0.0", callable.call());
        }

        //Do the work
        StopWatch stopWatch = new StopWatch();
        stopWatch.start();

        for (int i = 0; i < 100000; i++) {
            assertEquals("1.0.0", callable.call());
        }

        stopWatch.stop();
        System.out.println(description + " took " + stopWatch.getTime());
    }

}