122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
/*
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* Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.java.io;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.Blackhole;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Path;
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import java.util.concurrent.TimeUnit;
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/**
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* Tests the overheads of creating File objects, and converting such objects to Paths.
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*/
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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@Warmup(time=2, iterations=5)
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@Measurement(time=3, iterations=5)
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@Fork(value=2, jvmArgs="-Xmx1g")
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public class FileOpen {
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private String normalFile = "/test/dir/file/name.txt";
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private String root = "/";
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private String trailingSlash = "/test/dir/file/name.txt/";
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private String notNormalizedFile = "/test/dir/file//name.txt";
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public File tmp;
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@Setup
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public void setup() throws IOException {
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tmp = new File("FileOpen.tmp");
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tmp.createNewFile();
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tmp.deleteOnExit();
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}
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@Benchmark
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public void mix(Blackhole bh) {
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bh.consume(new File(normalFile));
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bh.consume(new File(root));
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bh.consume(new File(trailingSlash));
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bh.consume(new File(notNormalizedFile));
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}
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@Benchmark
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public File normalized() {
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return new File(normalFile);
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}
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@Benchmark
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public File root() {
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return new File(root);
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}
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@Benchmark
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public File trailingSlash() {
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return new File(trailingSlash);
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}
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@Benchmark
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public File notNormalized() {
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return new File(notNormalizedFile);
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}
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@Benchmark
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public boolean booleanAttributes() {
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return tmp.exists()
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&& tmp.isHidden()
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&& tmp.isDirectory()
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&& tmp.isFile();
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}
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@Benchmark
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public void mixToPath(Blackhole bh) {
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bh.consume(new File(normalFile).toPath());
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bh.consume(new File(root).toPath());
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bh.consume(new File(trailingSlash).toPath());
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bh.consume(new File(notNormalizedFile).toPath());
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}
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@Benchmark
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public Path normalizedToPath() {
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return new File(normalFile).toPath();
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}
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@Benchmark
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public Path rootToPath() {
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return new File(root).toPath();
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}
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@Benchmark
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public Path trailingSlashToPath() {
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return new File(trailingSlash).toPath();
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}
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@Benchmark
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public Path notNormalizedToPath() {
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return new File(notNormalizedFile).toPath();
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}
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}
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