Improve Expression.Lambda<TDelegate> performance (dotnet#32768)

Unnecessary cache call in Expression.Lambda<TDelegate> (with reflection in worst scenario) has been removed. Fix dotnet#32767
AndyAyersMS · Feb 25, 2020 · 634b348 · 634b348
1 parent ce23ff9
commit 634b348
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs b/src/libraries/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs
@@ -687,7 +687,11 @@ public static Expression<TDelegate> Lambda<TDelegate>(Expression body, string? n
         {
             ReadOnlyCollection<ParameterExpression> parameterList = parameters.ToReadOnly();
             ValidateLambdaArgs(typeof(TDelegate), ref body, parameterList, nameof(TDelegate));
-            return (Expression<TDelegate>)CreateLambda(typeof(TDelegate), body, name, tailCall, parameterList);
+#if FEATURE_COMPILE
+            return Expression<TDelegate>.Create(body, name, tailCall, parameterList);
+#else
+            return ExpressionCreator<TDelegate>.CreateExpressionFunc(body, name, tailCall, parameterList);
+#endif
         }
 
         /// <summary>