add benchmark

Author: wenshao

test/micro/org/openjdk/bench/java/time/format/DateTimeFormatterParse.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2025, Alibaba Group Holding Limited. 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.time.format;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
+import java.time.OffsetDateTime;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
+
+import java.util.Locale;
+import java.util.Random;
+import java.util.TimeZone;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@Warmup(iterations = 5, time = 1)
+@Measurement(iterations = 5, time = 1)
+@Fork(3)
+@State(Scope.Thread)
+public class DateTimeFormatterParse {
+    static final DateTimeFormatter formatterLocalTime = DateTimeFormatter.ofPattern("HH:mm:ss");
+    static final DateTimeFormatter formatterLocalTimeWithNano = DateTimeFormatter.ofPattern("HH:mm:ss.SSS");
+    static final DateTimeFormatter formatterLocalDate = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+    static final DateTimeFormatter formatterLocalDateTime = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss");
+    static final DateTimeFormatter formatterLocalDateTimeWithNano = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS");
+    static final DateTimeFormatter formatterOffsetDateTime = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSZZZZZ");
+    static final DateTimeFormatter formatterZonedDateTime = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSSSSZZZZZ'['VV']'");
+
+    static final String STR_LOCALTIME = "21:11:48";
+    static final String STR_LOCALTIME_WITH_NANO = "21:11:48.456";
+    static final String STR_LOCALDATE = "2024-08-01";
+    static final String STR_LOCALDATETIME = "2024-08-01T21:11:48";
+    static final String STR_LOCALDATETIME_WITH_NANO = "2024-08-01T21:11:48.456";
+    static final String STR_INSTANT = "2024-08-12T03:25:54.980339Z";
+    static final String STR_OFFSETDATETIME = "2024-08-12T11:50:46.731509+08:00";
+    static final String STR_ZONEDDATETIME = "2024-08-12T11:50:46.731509+08:00[Asia/Shanghai]";
+
+    @Benchmark
+    public LocalTime parseLocalTime() {
+        return LocalTime.parse(STR_LOCALTIME, formatterLocalTime);
+    }
+
+    @Benchmark
+    public LocalTime parseLocalTimeWithNano() {
+        return LocalTime.parse(STR_LOCALTIME_WITH_NANO, formatterLocalTimeWithNano);
+    }
+
+    @Benchmark
+    public LocalDate parseLocalDate() {
+        return LocalDate.parse(STR_LOCALDATE, formatterLocalDate);
+    }
+
+    @Benchmark
+    public LocalDateTime parseLocalDateTime() {
+        return LocalDateTime.parse(STR_LOCALDATETIME, formatterLocalDateTime);
+    }
+
+    @Benchmark
+    public LocalDateTime parseLocalDateTimeWithNano() {
+        return LocalDateTime.parse(STR_LOCALDATETIME_WITH_NANO, formatterLocalDateTimeWithNano);
+    }
+
+    @Benchmark
+    public OffsetDateTime parseOffsetDateTime() {
+        return OffsetDateTime.parse(STR_OFFSETDATETIME, formatterOffsetDateTime);
+    }
+
+    @Benchmark
+    public ZonedDateTime parseZonedDateTime() {
+        return ZonedDateTime.parse(STR_ZONEDDATETIME, formatterZonedDateTime);
+    }
+
+    @Benchmark
+    public Instant parseInstant() {
+        return Instant.parse(STR_INSTANT);
+    }
+}