124 lines
4.4 KiB
Java
124 lines
4.4 KiB
Java
/*
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* Copyright (c) 2024, Alibaba Group Holding Limited. 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.LocalDate;
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import java.time.LocalDateTime;
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import java.time.LocalTime;
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import java.time.ZonedDateTime;
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import java.time.ZoneOffset;
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import java.time.format.DateTimeFormatter;
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import java.time.temporal.ChronoUnit;
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import java.util.Locale;
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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 java.util.stream.Stream;
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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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import org.openjdk.jmh.infra.Blackhole;
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@BenchmarkMode(Mode.Throughput)
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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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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 ToStringBench {
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private static final Instant[] INSTANTS;
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private static final ZonedDateTime[] ZONED_DATE_TIMES;
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private static final LocalDateTime[] LOCAL_DATE_TIMES;
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private static final LocalDate[] LOCAL_DATES;
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private static final LocalTime[] LOCAL_TIMES;
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static {
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Instant loInstant = Instant.EPOCH.plus(Duration.ofDays(365*50)); // 2020-01-01
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Instant hiInstant = loInstant.plus(Duration.ofDays(1));
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long maxOffsetNanos = Duration.between(loInstant, hiInstant).toNanos();
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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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ZONED_DATE_TIMES = Stream.of(INSTANTS)
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.map(instant -> ZonedDateTime.ofInstant(instant, ZoneOffset.UTC))
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.toArray(ZonedDateTime[]::new);
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LOCAL_DATE_TIMES = Stream.of(ZONED_DATE_TIMES)
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.map(zdt -> zdt.toLocalDateTime())
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.toArray(LocalDateTime[]::new);
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LOCAL_DATES = Stream.of(LOCAL_DATE_TIMES)
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.map(ldt -> ldt.toLocalDate())
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.toArray(LocalDate[]::new);
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LOCAL_TIMES = Stream.of(LOCAL_DATE_TIMES)
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.map(ldt -> ldt.toLocalTime())
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.toArray(LocalTime[]::new);
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}
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@Benchmark
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public void zonedDateTimeToString(Blackhole bh) {
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for (final ZonedDateTime zonedDateTime : ZONED_DATE_TIMES) {
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bh.consume(zonedDateTime.toString());
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}
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}
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@Benchmark
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public void localDateTimeToString(Blackhole bh) {
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for (LocalDateTime localDateTime : LOCAL_DATE_TIMES) {
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bh.consume(localDateTime.toString());
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}
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}
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@Benchmark
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public void localDateToString(Blackhole bh) {
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for (LocalDate localDate : LOCAL_DATES) {
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bh.consume(localDate.toString());
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}
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}
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@Benchmark
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public void localTimeToString(Blackhole bh) {
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for (LocalTime localTime : LOCAL_TIMES) {
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bh.consume(localTime.toString());
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}
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}
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} |