1 /*
2  * Copyright (c) 2014 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 package org.openjdk.bench.java.lang;
24 
25 import org.openjdk.jmh.annotations.Benchmark;
26 import org.openjdk.jmh.annotations.BenchmarkMode;
27 import org.openjdk.jmh.annotations.Mode;
28 import org.openjdk.jmh.annotations.OutputTimeUnit;
29 import org.openjdk.jmh.annotations.Scope;
30 import org.openjdk.jmh.annotations.Setup;
31 import org.openjdk.jmh.annotations.State;
32 
33 import java.util.concurrent.TimeUnit;
34 
35 @BenchmarkMode(Mode.AverageTime)
36 @OutputTimeUnit(TimeUnit.NANOSECONDS)
37 @State(Scope.Thread)
38 public class StringBuffers {
39 
40     private String name;
41     private String blaha;
42     private Sigurd sig;
43 
44     @Setup
setup()45     public void setup() {
46         name = "joe";
47         blaha = "sniglogigloienlitenapasomarengrodasjukadjavelhej";
48         sig = new Sigurd();
49     }
50 
51     @Benchmark
appendAndToString()52     public String appendAndToString() {
53         return "MyStringBuffer named:" + ((name == null) ? "unknown" : name) + ".";
54     }
55 
56     @Benchmark
toStringComplex()57     public String toStringComplex() {
58         return sig.toString();
59     }
60 
61     static class Sigurd {
62         int x;
63         byte y;
64         String z = "yahoo";
65 
66         @Override
toString()67         public String toString() {
68             return Integer.toString(x) + "_" + Integer.toString((int) y) + "_" + z + "_";
69         }
70     }
71 
72     @Benchmark
substring()73     public String substring() {
74         return blaha.substring(30, 35);
75     }
76 
77 }
78