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Previous commit (fcbbc0d) added org.openjdk.bench.java.lang.ArrayCopyAlignedLarge benchmark

test/micro/org/openjdk/bench/java/lang/ArrayCopyAlignedLarge.java

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+/*
+ * Copyright (c) 2023, Oracle and/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.lang;
+
+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 java.util.concurrent.TimeUnit;
+
+/**
+ * Benchmark measuring aligned System.arraycopy.
+ */
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+@Warmup(iterations = 10, time = 1)
+@Measurement(iterations = 5, time = 1)
+@Fork(value = 3)
+public class ArrayCopyAlignedLarge {
+
+    @Param({"100000", "1000000", "2000000", "5000000", "10000000"})
+    int length;
+
+    int fromPos, toPos;
+    byte[] fromByteArr, toByteArr;
+
+    @Setup
+    public void setup() {
+        // Both positions aligned
+        fromPos = 0;
+        toPos = 0;
+
+        fromByteArr = new byte[length];
+        toByteArr = new byte[length];
+    }
+
+    @Benchmark
+    public void testByte() {
+        System.arraycopy(fromByteArr, fromPos, toByteArr, toPos, length);
+    }
+}