Add extension methods for logging timings

Author: jcansdale

src/GitHub.Logging/Logging/ILoggerExtensions.cs

@@ -1,3 +1,6 @@
+using System;
+using System.Globalization;
+using System.Threading.Tasks;
 using Serilog;
 
 namespace GitHub.Logging
@@ -25,5 +28,37 @@ public static void Assert(this ILogger logger, bool condition, string messageTem
 #pragma warning restore Serilog004
             }
         }
+
+        public static void Time(this ILogger logger, string name, Action method)
+        {
+            var startTime = DateTime.Now;
+            method();
+            logger.Information("{Name} took {Seconds} seconds", name, FormatSeconds(DateTime.Now - startTime));
+        }
+
+        public static T Time<T>(this ILogger logger, string name, Func<T> method)
+        {
+            var startTime = DateTime.Now;
+            var value = method();
+            logger.Information("{Name} took {Seconds} seconds", name, FormatSeconds(DateTime.Now - startTime));
+            return value;
+        }
+
+        public static async Task TimeAsync(this ILogger logger, string name, Func<Task> methodAsync)
+        {
+            var startTime = DateTime.Now;
+            await methodAsync().ConfigureAwait(false);
+            logger.Information("{Name} took {Seconds} seconds", name, FormatSeconds(DateTime.Now - startTime));
+        }
+
+        public static async Task<T> TimeAsync<T>(this ILogger logger, string name, Func<Task<T>> methodAsync)
+        {
+            var startTime = DateTime.Now;
+            var value = await methodAsync().ConfigureAwait(false);
+            logger.Information("{Name} took {Seconds} seconds", name, FormatSeconds(DateTime.Now - startTime));
+            return value;
+        }
+
+        static string FormatSeconds(TimeSpan timeSpan) => timeSpan.TotalSeconds.ToString("0.##", CultureInfo.InvariantCulture);
     }
-}
+}