Benchmarks for DateTime.Day/.Month/.Year/.DayOfYear (#2549)

Author: SergeiPavlov

src/benchmarks/micro/libraries/System.Runtime/Perf.DateTime.cs

@@ -13,7 +13,7 @@ public class Perf_DateTime
     {
         DateTime date1 = new DateTime(1996, 6, 3, 22, 15, 0);
         DateTime date2 = new DateTime(1996, 12, 6, 13, 2, 0);
-        
+
         [Benchmark]
         public DateTime GetNow() => DateTime.Now;
 
@@ -41,5 +41,17 @@ public static IEnumerable<string> ToString_MemberData()
 
         [Benchmark]
         public DateTime ParseO() => DateTime.ParseExact("1996-06-03T22:15:00.0000000", "o", null);
+
+        [Benchmark]
+        public int Day() => date1.Day;
+
+        [Benchmark]
+        public int Month() => date1.Month;
+
+        [Benchmark]
+        public int Year() => date1.Year;
+
+        [Benchmark]
+        public int DayOfYear() => date1.DayOfYear;
     }
 }