1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package org.openjdk.bench.java.lang;

    25 

    26 import org.openjdk.jmh.annotations.*;

    27 import java.util.concurrent.TimeUnit;

    28 

    29 @BenchmarkMode(Mode.AverageTime)

    30 @OutputTimeUnit(TimeUnit.NANOSECONDS)

    31 @State(Scope.Benchmark)

    32 public class StringSubstring {

    33 

    34     public String s = new String("An arbitrary string that happened to be of length 52");

    35 

    36     @Benchmark

    37     public String from26toEnd0() {

    38         return s.substring(26);

    39     }

    40 

    41     @Benchmark

    42     public String from26toEnd1() {

    43         return s.substring(26, s.length());

    44     }

    45 }