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 }