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 45 public void setup() { 46 name = "joe"; 47 blaha = "sniglogigloienlitenapasomarengrodasjukadjavelhej"; 48 sig = new Sigurd(); 49 } 50 51 @Benchmark 52 public String appendAndToString() { 53 return "MyStringBuffer named:" + ((name == null) ? "unknown" : name) + "."; 54 } 55 56 @Benchmark 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 67 public String toString() { 68 return Integer.toString(x) + "_" + Integer.toString((int) y) + "_" + z + "_"; 69 } 70 } 71 72 @Benchmark 73 public String substring() { 74 return blaha.substring(30, 35); 75 } 76 77 }