Call benchmark method directly instead of via delegate.

Author: timcassell

src/BenchmarkDotNet/Code/CodeGenerator.cs

@@ -45,7 +45,6 @@ internal static string Generate(BuildPartition buildPartition)
                     .Replace("$ID$", buildInfo.Id.ToString())
                     .Replace("$OperationsPerInvoke$", provider.OperationsPerInvoke)
                     .Replace("$WorkloadTypeName$", provider.WorkloadTypeName)
-                    .Replace("$WorkloadMethodDelegate$", provider.WorkloadMethodDelegate(passArguments))
                     .Replace("$WorkloadMethodReturnType$", provider.WorkloadMethodReturnTypeName)
                     .Replace("$WorkloadMethodReturnTypeModifiers$", provider.WorkloadMethodReturnTypeModifiers)
                     .Replace("$OverheadMethodReturnTypeName$", provider.OverheadMethodReturnTypeName)

src/BenchmarkDotNet/Code/DeclarationsProvider.cs

@@ -36,8 +36,6 @@ internal abstract class DeclarationsProvider
 
         public virtual string WorkloadMethodReturnTypeName => WorkloadMethodReturnType.GetCorrectCSharpTypeName();
 
-        public virtual string WorkloadMethodDelegate(string passArguments) => Descriptor.WorkloadMethod.Name;
-
         public virtual string WorkloadMethodReturnTypeModifiers => null;
 
         public virtual string GetWorkloadMethodCall(string passArguments) => $"{Descriptor.WorkloadMethod.Name}({passArguments})";
@@ -151,9 +149,6 @@ public TaskDeclarationsProvider(Descriptor descriptor) : base(descriptor) { }
 
         // we use GetAwaiter().GetResult() because it's fastest way to obtain the result in blocking way,
         // and will eventually throw actual exception, not aggregated one
-        public override string WorkloadMethodDelegate(string passArguments)
-            => $"({passArguments}) => {{ {Descriptor.WorkloadMethod.Name}({passArguments}).GetAwaiter().GetResult(); }}";
-
         public override string GetWorkloadMethodCall(string passArguments) => $"{Descriptor.WorkloadMethod.Name}({passArguments}).GetAwaiter().GetResult()";
 
         protected override Type WorkloadMethodReturnType => typeof(void);
@@ -170,9 +165,6 @@ public GenericTaskDeclarationsProvider(Descriptor descriptor) : base(descriptor)
 
         // we use GetAwaiter().GetResult() because it's fastest way to obtain the result in blocking way,
         // and will eventually throw actual exception, not aggregated one
-        public override string WorkloadMethodDelegate(string passArguments)
-            => $"({passArguments}) => {{ return {Descriptor.WorkloadMethod.Name}({passArguments}).GetAwaiter().GetResult(); }}";
-
         public override string GetWorkloadMethodCall(string passArguments) => $"{Descriptor.WorkloadMethod.Name}({passArguments}).GetAwaiter().GetResult()";
     }
 }