Compate Apache Common Lang StringUtils split performance with Google Guava Splitter split method.

StringUtilsTest.java

import static org.junit.Assert.assertTrue;

import java.util.LinkedList;
import java.util.List;

import org.apache.commons.lang.RandomStringUtils;
import org.apache.commons.lang.StringUtils;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.util.StopWatch;

import com.google.common.base.Splitter;

public class StringUtilsTest
{

    static int testDataCount = 5000;

    static int testDataStringSize = 10000;

    static List<String> testData = new LinkedList<String>();

    static StopWatch stopWatch = new StopWatch();

    @BeforeClass
    public static void generateTestData() {
        for(int i=0; i < testDataCount; i++){
            String data = RandomStringUtils
              .random(testDataStringSize, "ABCDEFGHIJKLMNOPQRSTUVXYZ,");
            testData.add(data);
        }
    }

    @AfterClass
    public static void printTestSummery(){
        System.out.println(stopWatch.prettyPrint());
    }

    @Test
    public void apacheCommonLangSplit()  throws Exception {
        stopWatch.start("Apache Common Lang Split");
        for(String data: testData){
            String[] elements = StringUtils.split(data, ",");
            for (String element : elements) {
                assertTrue(element.length() < testDataStringSize);
            }
        }
        stopWatch.stop();
    }

    @Test
    public void guavaSplitterSplit() throws Exception {
        stopWatch.start("Google Guava Splitter");
        Splitter spiltter = Splitter.on(",");
        for(String data: testData){
            Iterable<String> elements = spiltter.split(data);
            for (String element : elements) {
                assertTrue(element.length() < testDataStringSize);
            }
        }
        stopWatch.stop();
    }

}