b438cffdb9
Co-authored-by: Vladimir Ivanov <vaivanov@openjdk.org> Reviewed-by: sviswanathan, ecaspole
90 lines
3.2 KiB
Java
90 lines
3.2 KiB
Java
/*
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* Copyright (c) 2022, 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.time;
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import java.time.Duration;
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import java.time.Instant;
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import java.time.temporal.ChronoUnit;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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import java.util.stream.IntStream;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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/**
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* Examine Instant.plusSeconds operations
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*/
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@BenchmarkMode(Mode.Throughput)
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@OutputTimeUnit(TimeUnit.MICROSECONDS)
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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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@State(Scope.Thread)
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public class InstantBench {
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private Instant[] INSTANTS;
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private int[] SECONDS;
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private long[] RESULT;
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@Setup
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public void createInstants() {
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// Various instants during the same day
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final Instant loInstant = Instant.EPOCH.plus(Duration.ofDays(365*50)); // 2020-01-01
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final Instant hiInstant = loInstant.plus(Duration.ofDays(1));
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final long maxOffsetNanos = Duration.between(loInstant, hiInstant).toNanos();
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final Random random = new Random(0);
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INSTANTS = IntStream
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.range(0, 1_000)
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.mapToObj(ignored -> {
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final long offsetNanos = (long) Math.floor(random.nextDouble() * maxOffsetNanos);
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return loInstant.plus(offsetNanos, ChronoUnit.NANOS);
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})
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.toArray(Instant[]::new);
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SECONDS = IntStream
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.range(0, INSTANTS.length)
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.map(ignored -> random.nextInt(1000))
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.toArray();
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RESULT = new long[INSTANTS.length];
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}
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@Benchmark
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public long[] plusSecondsDropNanos() {
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for (int i = 0; i < INSTANTS.length; i++) {
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RESULT[i] = INSTANTS[i].plusSeconds(SECONDS[i]).getEpochSecond();
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}
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return RESULT;
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}
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}
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