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[release/3.1] Improve Expression.Lambda<TDelegate> performance (dotnet/runtime#32768) #42874

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[release/3.1] Improve Expression.Lambda<TDelegate> performance (dotnet/runtime#32768) #42874

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6 changes: 5 additions & 1 deletion src/System.Linq.Expressions/src/System/Linq/Expressions/LambdaExpression.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -695,7 +695,11 @@ public static Expression<TDelegate> Lambda<TDelegate>(Expression body, string na
{
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>
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