hal/test/zutil/benchmark/StringSplitBenchmark.java

package zutil.benchmark;

import com.carrotsearch.junitbenchmarks.BenchmarkRule;
import org.junit.Rule;
import org.junit.Test;
import zutil.StringUtil;

import java.util.List;
import java.util.regex.Pattern;

import static org.junit.Assert.assertEquals;

/**
 * Created by Ziver on 2016-07-07.
 */
public class StringSplitBenchmark {
    public static final int TEST_EXECUTIONS = 200000;

    @Rule
    public BenchmarkRule benchmarkRun = new BenchmarkRule();

    private static String delimiter = ",";
    private static String str = "aaa,aaaaaa,aaaaaa,aa,a,a,a,bb,bbb,aaaaaaaaa,a,a,aaa";


    @Test
    public void stringSplit(){
        for(int i=0; i<TEST_EXECUTIONS; i++)
            assertSplit(str.split(delimiter));
    }

    public static Pattern pattern = Pattern.compile(delimiter);
    @Test
    public void patternSplit(){
        for(int i=0; i<TEST_EXECUTIONS; i++)
            assertSplit(pattern.split(str));
    }

    @Test
    public void substring(){
        for(int i=0; i<TEST_EXECUTIONS; i++) {
            List<String> splitList = StringUtil.split(str, delimiter.charAt(0));
            assertSplit(splitList.toArray(new String[splitList.size()]));
        }
    }

    public void assertSplit(String[] str){
        assertEquals(13,str.length);
    }
}