WriteJson nullable valuetype benchmarks

src/benchmarks/micro/Serializers/DataGenerator.cs

@@ -55,6 +55,10 @@ internal static T Generate<T>()
                 return (T)(object)CreateLargeStructWithProperties();
             if (typeof(T) == typeof(int))
                 return (T)(object)42;
+            if (typeof(T) == typeof(DateTime?))
+                return (T)(object)DateTime.UtcNow;
+            if (typeof(T) == typeof(ClassWithValueTypes))
+                return (T)(object)CreateClassWithValueTypes();
 
             throw new NotImplementedException();
         }
@@ -178,7 +182,7 @@ private static DateTime[] CreateDateTimeArray(int count)
 
             return arr;
         }
-        
+
         private static Dictionary<int, string> CreateDictionaryOfIntString(int count)
         {
             Dictionary<int, string> dictOfIntString = new Dictionary<int, string>(count);
@@ -213,6 +217,17 @@ private static XmlElement CreateXmlElement()
             xmlElement.InnerText = "Element innertext";
             return xmlElement;
         }
+
+        private static ClassWithValueTypes CreateClassWithValueTypes()
+            => new ClassWithValueTypes
+            {
+                Value = 0,
+                NullableValueSet = 1,
+                NullableValueNull = null,
+                LargeStruct = CreateLargeStructWithProperties(),
+                NullableLargeStructSet = CreateLargeStructWithProperties(),
+                NullableLargeStructNull = null
+            };
     }
 
     // the view models come from a real world app called "AllReady"
@@ -286,7 +301,7 @@ public class CampaignSummaryViewModel
     [Serializable]
     [ProtoContract]
     [MessagePackObject]
-    public class IndexViewModel 
+    public class IndexViewModel
     {
         [ProtoMember(1)] [Key(0)] public List<ActiveOrUpcomingEvent> ActiveOrUpcomingEvents { get; set; }
         [ProtoMember(2)] [Key(1)] public CampaignSummaryViewModel FeaturedCampaign { get; set; }
@@ -365,10 +380,10 @@ public class CollectionsOfPrimitives
     {
         [ProtoMember(1)] [Key(0)] public byte[] ByteArray { get; set; }
         [ProtoMember(2)] [Key(1)] public DateTime[] DateTimeArray { get; set; }
-        
+
         [XmlIgnore] // xml serializer does not support anything that implements IDictionary..
         [ProtoMember(3)] [Key(2)] public Dictionary<int, string> Dictionary { get; set; }
-        
+
         [ProtoMember(4)] [Key(3)] public List<int> ListOfInt { get; set; }
     }
 
@@ -396,7 +411,7 @@ public struct SimpleStructWithProperties
     }
 
     public class SimpleListOfInt : List<int> { }
-    
+
     public class ClassImplementingIXmlSerialiable : IXmlSerializable
     {
         public string StringValue { get; set; }
@@ -419,4 +434,19 @@ public void WriteXml(XmlWriter writer)
             writer.WriteAttributeString("BoolValue", BoolValue.ToString());
         }
     }
+
+    public class ClassWithValueTypes
+    {
+        public int Value { get; set; }
+
+        public int? NullableValueSet { get; set; }
+
+        public int? NullableValueNull { get; set; }
+
+        public LargeStructWithProperties LargeStruct { get; set; }
+
+        public LargeStructWithProperties? NullableLargeStructSet { get; set; }
+
+        public LargeStructWithProperties? NullableLargeStructNull { get; set; }
+    }
 }

src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs

@@ -27,6 +27,8 @@ namespace System.Text.Json.Serialization.Tests
     [GenericTypeArguments(typeof(SimpleStructWithProperties))]
     [GenericTypeArguments(typeof(LargeStructWithProperties))]
     [GenericTypeArguments(typeof(int))]
+    [GenericTypeArguments(typeof(DateTime?))]
+    [GenericTypeArguments(typeof(ClassWithValueTypes))]
     public class WriteJson<T>
     {
         private T _value;