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8246338: Reduce overhead of normalizing file paths

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Reviewed-by: alanb
This commit is contained in:
Claes Redestad 2020-06-02 22:22:58 +02:00
parent ddbc7ed0a1
commit 0366f6bf45
2 changed files with 86 additions and 17 deletions
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69
test/micro/org/openjdk/bench/java/io/FileOpen.java Normal file
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/*
* Copyright (c) 2020, 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.io;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;
import java.io.File;
import java.util.concurrent.TimeUnit;
/**
* Tests the overheads of I/O API.
*/
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@State(Scope.Thread)
@Warmup(time=2, iterations=5)
@Measurement(time=3, iterations=5)
@Fork(value=2, jvmArgs="-Xmx1g")
public class FileOpen {
public String normalFile = "/test/dir/file/name.txt";
public String root = "/";
public String trailingSlash = "/test/dir/file//name.txt";
public String notNormalizedFile = "/test/dir/file//name.txt";
@Benchmark
public void mix(Blackhole bh) {
bh.consume(new File(normalFile));
bh.consume(new File(root));
bh.consume(new File(trailingSlash));
bh.consume(new File(notNormalizedFile));
}
@Benchmark
public File normalized() {
return new File(normalFile);
}
@Benchmark
public File trailingSlash() {
return new File(trailingSlash);
}
@Benchmark
public File notNormalized() {
return new File(notNormalizedFile);
}
}