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.io; 24 25 import org.openjdk.jmh.annotations.*; 26 import org.openjdk.jmh.infra.Blackhole; 27 28 import java.io.File; 29 import java.util.concurrent.TimeUnit; 30 31 /** 32 * Tests the overheads of I/O API. 33 */ 34 @BenchmarkMode(Mode.AverageTime) 35 @OutputTimeUnit(TimeUnit.MICROSECONDS) 36 @State(Scope.Thread) 37 @Warmup(time=2, iterations=5) 38 @Measurement(time=3, iterations=5) 39 @Fork(value=2, jvmArgs="-Xmx1g") 40 public class FileOpen { 41 42 public String normalFile = "/test/dir/file/name.txt"; 43 public String root = "/"; 44 public String trailingSlash = "/test/dir/file//name.txt"; 45 public String notNormalizedFile = "/test/dir/file//name.txt"; 46 47 @Benchmark 48 public void mix(Blackhole bh) { 49 bh.consume(new File(normalFile)); 50 bh.consume(new File(root)); 51 bh.consume(new File(trailingSlash)); 52 bh.consume(new File(notNormalizedFile)); 53 } 54 55 @Benchmark 56 public File normalized() { 57 return new File(normalFile); 58 } 59 60 @Benchmark 61 public File trailingSlash() { 62 return new File(trailingSlash); 63 } 64 65 @Benchmark 66 public File notNormalized() { 67 return new File(notNormalizedFile); 68 } 69 }