Add Dict SequentialKeys test (#938)

src/benchmarks/micro/corefx/System.Collections/Dictionary/DictionarySequentialKeys.cs

@@ -0,0 +1,181 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+using System.Linq;
+using BenchmarkDotNet.Attributes;
+using MicroBenchmarks;
+
+namespace System.Collections.Tests
+{
+    [BenchmarkCategory(Categories.CoreFX, Categories.Collections, Categories.GenericCollections)]
+    public class DictionarySequentialKeys
+    {
+        private const int Seventeen = 17;
+        private const int ThreeThousand = 3_000;
+
+        private Dictionary<int, int> _dict_3k;
+        private Dictionary<int, (long, long, long, long)> _dict32ByteValue_3k;
+        private Dictionary<int, (object, object, object, object)> _dict32ByteRefsValue_3k;
+
+        private Dictionary<int, int> _dict_17;
+        private Dictionary<int, (long, long, long, long)> _dict32ByteValue_17;
+        private Dictionary<int, (object, object, object, object)> _dict32ByteRefsValue_17;
+
+        [GlobalSetup]
+        public void Initialize()
+        {
+            (object, object, object, object) item = (new object(), new object(), new object(), new object());
+
+            _dict_17 = Enumerable.Range(0, Seventeen).ToDictionary(i => i);
+            _dict32ByteValue_17 = Enumerable.Range(0, Seventeen).ToDictionary(i => i, i => default((long, long, long, long)));
+            _dict32ByteRefsValue_17 = Enumerable.Range(0, Seventeen).ToDictionary(i => i, i => item);
+
+            _dict_3k = Enumerable.Range(0, ThreeThousand).ToDictionary(i => i);
+            _dict32ByteValue_3k = Enumerable.Range(0, ThreeThousand).ToDictionary(i => i, i => default((long, long, long, long)));
+            _dict32ByteRefsValue_3k = Enumerable.Range(0, ThreeThousand).ToDictionary(i => i, i => item);
+        }
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int ContainsValue_17_Int_Int()
+            => ContainsKey_Int_Int(_dict_17, Seventeen);
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int ContainsKey_17_Int_32ByteValue()
+            => ContainsKey_Int_LargeStruct(_dict32ByteValue_17, Seventeen);
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int ContainsKey_17_Int_32ByteRefsValue() 
+            => ContainsKey_Int_LargeRefStruct(_dict32ByteRefsValue_17, Seventeen);
+
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int ContainsValue_3k_Int_Int() 
+            => ContainsKey_Int_Int(_dict_3k, ThreeThousand);
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int ContainsKey_3k_Int_32ByteValue()
+            => ContainsKey_Int_LargeStruct(_dict32ByteValue_3k, ThreeThousand);
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int ContainsKey_3k_Int_32ByteRefsValue()
+            => ContainsKey_Int_LargeRefStruct(_dict32ByteRefsValue_3k, ThreeThousand);
+
+
+        private static int ContainsKey_Int_Int(Dictionary<int, int> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.ContainsKey(i))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+
+        private static int ContainsKey_Int_LargeStruct(Dictionary<int, (long, long, long, long)> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.ContainsKey(i))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+
+        private static int ContainsKey_Int_LargeRefStruct(Dictionary<int, (object, object, object, object)> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.ContainsKey(i))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int TryGetValue_17_Int_Int()
+            => TryGetValue_Int_Int(_dict_17, Seventeen);
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int TryGetValue_17_Int_32ByteValue()
+            => TryGetValue_Int_LargeStruct(_dict32ByteValue_17, Seventeen);
+
+        [Benchmark(OperationsPerInvoke = Seventeen)]
+        public int TryGetValue_17_Int_32ByteRefsValue()
+            => TryGetValue_Int_LargeRefStruct(_dict32ByteRefsValue_17, Seventeen);
+
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int TryGetValue_3k_Int_Int()
+            => TryGetValue_Int_Int(_dict_3k, ThreeThousand);
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int TryGetValue_3k_Int_32ByteValue()
+            => TryGetValue_Int_LargeStruct(_dict32ByteValue_3k, ThreeThousand);
+
+        [Benchmark(OperationsPerInvoke = ThreeThousand)]
+        public int TryGetValue_3k_Int_32ByteRefsValue()
+            => TryGetValue_Int_LargeRefStruct(_dict32ByteRefsValue_3k, ThreeThousand);
+
+        private static int TryGetValue_Int_Int(Dictionary<int, int> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.TryGetValue(i, out _))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+
+        private static int TryGetValue_Int_LargeStruct(Dictionary<int, (long, long, long, long)> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.TryGetValue(i, out _))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+
+        private static int TryGetValue_Int_LargeRefStruct(Dictionary<int, (object, object, object, object)> d, int count)
+        {
+            int total = 0;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (d.TryGetValue(i, out _))
+                {
+                    total++;
+                }
+            }
+
+            return total;
+        }
+    }
+}