/* * Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package org.openjdk.bench.java.lang; import org.openjdk.jmh.annotations.Benchmark; import org.openjdk.jmh.annotations.BenchmarkMode; import org.openjdk.jmh.annotations.Mode; import org.openjdk.jmh.annotations.OutputTimeUnit; import org.openjdk.jmh.annotations.Scope; import org.openjdk.jmh.annotations.Setup; import org.openjdk.jmh.annotations.State; import java.util.concurrent.TimeUnit; @BenchmarkMode(Mode.AverageTime) @OutputTimeUnit(TimeUnit.NANOSECONDS) @State(Scope.Thread) public class StringBuffers { private String name; private String blaha; private Sigurd sig; @Setup public void setup() { name = "joe"; blaha = "sniglogigloienlitenapasomarengrodasjukadjavelhej"; sig = new Sigurd(); } @Benchmark public String appendAndToString() { return "MyStringBuffer named:" + ((name == null) ? "unknown" : name) + "."; } @Benchmark public String toStringComplex() { return sig.toString(); } static class Sigurd { int x; byte y; String z = "yahoo"; @Override public String toString() { return Integer.toString(x) + "_" + Integer.toString((int) y) + "_" + z + "_"; } } @Benchmark public String substring() { return blaha.substring(30, 35); } }