Add benchmark

Author: shipilev

test/micro/org/openjdk/bench/java/util/UUIDRandomBench.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright Amazon.com Inc. 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.util;
+
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.annotations.*;
+
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(3)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@BenchmarkMode(Mode.Throughput)
+public class UUIDRandomBench {
+
+    @Benchmark
+    @Threads(1)
+    public UUID single() {
+        return UUID.randomUUID();
+    }
+
+    @Benchmark
+    @Threads(Threads.MAX)
+    public UUID max() {
+        return UUID.randomUUID();
+    }
+
+}