---
title: "noinline | Microsoft Docs"
ms.custom: ""
ms.date: "11/04/2016"
ms.technology: ["cpp-language"]
ms.topic: "language-reference"
f1_keywords: ["noinline_cpp"]
dev_langs: ["C++"]
helpviewer_keywords: ["noinline __declspec keyword", "__declspec keyword [C++], noinline"]
ms.assetid: f259d55b-dec7-4bde-8cf9-14521e4fdc42
author: "mikeblome"
ms.author: "mblome"
ms.workload: ["cplusplus"]
---
# noinline
## Microsoft Specific  
 **__declspec(noinline)** tells the compiler to never inline a particular member function (function in a class).  
  
 It may be worthwhile to not inline a function if it is small and not critical to the performance of your code. That is, if the function is small and not likely to be called often, such as a function that handles an error condition.  
  
 Keep in mind that if a function is marked `noinline`, the calling function will be smaller and thus, itself a candidate for compiler inlining.  
  
```  
class X {  
   __declspec(noinline) int mbrfunc() {  
      return 0;   
   }   // will not inline  
};  
```  
  
**END Microsoft Specific**  
  
## See Also  
 [__declspec](../cpp/declspec.md)   
 [Keywords](../cpp/keywords-cpp.md)   
 [inline, __inline, \__forceinline](inline-functions-cpp.md)