8254957: Comparison of ArrayList with int, Integer, PrimitiveInt,...

test/micro/org/openjdk/bench/valhalla/sandbox/corelibs/ArrayListOfIntBench.java

@@ -0,0 +1,239 @@
+/*
+ * Copyright (c) 2020, 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.valhalla.sandbox.corelibs;
+
+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.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.TearDown;
+
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.ArrayList;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Measure performance of List of Integer operations.
+ * - Set all of int from a set of random numbers (with a seed)
+ * - Get all
+ * - Shuffle the array
+ * - Sort the array
+ */
+
+
+@Fork(value = 3, jvmArgsAppend = "--enable-preview")
+@Warmup(iterations = 5, time = 2)
+@Measurement(iterations = 5, time = 3)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@BenchmarkMode(Mode.AverageTime)
+@State(Scope.Thread)
+public class ArrayListOfIntBench {
+
+    @Param({
+            "100",
+            "1000000",
+    })
+    public int size;
+
+    ArrayListInt arrayListInt;
+    ArrayListPrimitiveInt arrayListPrimitiveInt;
+    ArrayList<Integer> arrayListOfInteger;
+    ArrayList<PrimitiveInt.ref> arrayListOfPrimitiveInt;
+    Random random;
+
+    @Setup
+    public void setup() {
+        arrayListInt = new ArrayListInt(size);
+        for (int i = 0; i < size; i++) {
+            arrayListInt.add(i, i);
+        }
+
+        arrayListPrimitiveInt = new ArrayListPrimitiveInt(size);
+        for (int i = 0; i < size; i++) {
+            arrayListPrimitiveInt.add(i, new PrimitiveInt(i));
+        }
+
+        arrayListOfInteger = new ArrayList<>(size);
+        for (int i = 0; i < size; i++) {
+            arrayListOfInteger.add(i, i);
+        }
+
+        arrayListOfPrimitiveInt = new ArrayList<PrimitiveInt.ref>(size);
+        for (int i = 0; i < size; i++) {
+            arrayListOfPrimitiveInt.add(i, new PrimitiveInt(i));
+        }
+
+        random = new Random(42);
+    }
+
+    @Benchmark
+    public Object appendListInt() {
+        ArrayListInt list = new ArrayListInt(size);
+        for (int i = 0; i < size; i++) {
+            list.add(i);
+        }
+        return list;
+    }
+
+    @Benchmark
+    public Object appendListPrimitiveInt() {
+        ArrayListPrimitiveInt list = new ArrayListPrimitiveInt(size);
+        for (int i = 0; i < size; i++) {
+            list.add(new PrimitiveInt(i));
+        }
+        return list;
+    }
+
+    @Benchmark
+    public Object appendListOfInteger() {
+        ArrayList<Integer> list = new ArrayList<>(size);
+        for (int i = 0; i < size; i++) {
+            list.add(i);
+        }
+        return list;
+    }
+
+    @Benchmark
+    public Object appendListOfPrimitiveInt() {
+        ArrayList<PrimitiveInt.ref> list = new ArrayList<>(size);
+        for (int i = 0; i < size; i++) {
+            list.add(new PrimitiveInt(i));
+        }
+        return list;
+    }
+
+
+    @Benchmark
+    public int sumListInt() {
+        int sum = 0;
+        for (int i = 0; i < size; i++) {
+            sum += arrayListInt.get(i);
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public int sumListOfInteger() {
+        int sum = 0;
+        for (int i = 0; i < size; i++) {
+            sum += arrayListOfInteger.get(i);
+        }
+        return sum;
+    }
+
+
+    @Benchmark
+    public int sumListPrimitiveInt() {
+        int sum = 0;
+        for (int i = 0; i < size; i++) {
+            sum += arrayListPrimitiveInt.get(i).value();
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public int sumListOfPrimitiveInt() {
+        int sum = 0;
+        for (int i = 0; i < size; i++) {
+            sum += arrayListOfPrimitiveInt.get(i).value();
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public int thrashListInt() {
+        final ArrayListInt list = arrayListInt;
+
+        int sum = 0;
+        for (int i = 0; i < 1000; i++) {
+            int ndx = (random.nextInt() & 0x7fffffff) % list.size();    // positive
+            if (list.size() == size) {
+                list.remove(ndx);
+            } else {
+                list.add(ndx);
+            }
+            sum += ndx;
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public int thrashListPrimitiveInt() {
+        final ArrayListPrimitiveInt list = arrayListPrimitiveInt;
+        int sum = 0;
+        for (int i = 0; i < 1000; i++) {
+            int ndx = (random.nextInt() & 0x7fffffff) % list.size();    // positive
+            if (list.size() == size) {
+                list.remove(ndx);
+            } else {
+                list.add(ndx, new PrimitiveInt(ndx));
+            }
+            sum += ndx;
+        }
+        return sum;
+    }
+
+    @Benchmark
+    public int thrashListOfInteger() {
+        final ArrayList<Integer> list = arrayListOfInteger;
+        int sum = 0;
+        for (int i = 0; i < 1000; i++) {
+            int ndx = (random.nextInt() & 0x7fffffff) % list.size();    // positive
+            if (list.size() == size) {
+                list.remove(ndx);
+            } else {
+                list.add(ndx);
+            }
+            sum += ndx;
+        }
+        return sum;
+    }
+
+
+    @Benchmark
+    public int thrashListOfPrimitiveInt() {
+        final ArrayList<PrimitiveInt.ref> list = arrayListOfPrimitiveInt;
+        int sum = 0;
+
+        for (int i = 0; i < 1000; i++) {
+            int ndx = (random.nextInt() & 0x7fffffff) % list.size();    // positive
+            if (list.size() == size) {
+                list.remove(ndx);
+            } else {
+                list.add(ndx, new PrimitiveInt(ndx));
+            }
+            sum += ndx;
+        }
+        return sum;
+    }
+}

test/micro/org/openjdk/bench/valhalla/sandbox/corelibs/PrimitiveInt.java

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+package org.openjdk.bench.valhalla.sandbox.corelibs;
+
+public inline class PrimitiveInt {
+    int value;
+
+    PrimitiveInt(int value) {
+        this.value = value;
+    }
+
+    int value() {
+        return value;
+    }
+
+    public String toString() {
+        return Integer.toString(value);
+    }
+}