86 lines
2.5 KiB
Java
86 lines
2.5 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.util;
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import java.util.UUID;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.*;
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@State(Scope.Thread)
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@OutputTimeUnit(TimeUnit.MICROSECONDS)
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@Fork(value = 3)
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@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
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@Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS)
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public class UUIDBench {
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@Param("20000")
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private int size;
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private byte[][] uuidBytes;
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private UUID[] uuids;
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private String[] uuidStrings;
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private int index = 0;
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@Setup
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public void setup() {
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uuidBytes = new byte[size][];
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uuids = new UUID[size];
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uuidStrings = new String[size];
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java.util.Random r = new java.util.Random(0);
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for (int i = 0; i < this.uuidStrings.length; i++) {
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final UUID uuid = UUID.randomUUID();
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this.uuidBytes[i] = new byte[16];
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r.nextBytes(this.uuidBytes[i]);
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this.uuids[i] = uuid;
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this.uuidStrings[i] = uuid.toString();
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}
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}
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@Setup(Level.Iteration)
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public void setupIteration() {
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index++;
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if (index >= size) {
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index = 0;
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}
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}
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@Benchmark
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public UUID fromString() {
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return UUID.fromString(uuidStrings[index]);
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}
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@Benchmark
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public String toString() {
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return uuids[index].toString();
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}
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@Benchmark
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public UUID fromType3Bytes() {
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return UUID.nameUUIDFromBytes(uuidBytes[index]);
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}
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}
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