Visual Studio 2008性能糟糕 [英] Visual Studio 2008 awful performance

问题描述

我已经移植了一个C ++代码，从核心，从Linux（Ubuntu）到Windows（Vista），我意识到，它的工作速度比VS2008慢50倍！我删除了所有的核心部分，现在我只是有一块代码与硬盘无关。

我设置编译器参数为O2在项目属性，但仍然比g ++在linux上慢了大约10倍！

有没有人知道为什么VS在VS下这么慢？

$

感谢，

解决方案

你使用很多标准的C ++库吗？如果是这样，您可能想关闭默认情况下在Visual C ++中启用的checked iterators功能（即使在发布模式下）。在包含任何标准标头之前加入此标签：

  #define _SECURE_SCL 0 
  

更多信息。

I have ported a piece of C++ code, that works out of core, from Linux(Ubuntu) to Windows(Vista) and I realized that it works about 50times slower on VS2008! I removed all the out of core parts and now I just have a piece of code that has nothing to do with the hard disk.

I set compiler parameters to O2 in Project Properties but still get about 10times slower than g++ in linux!

Does anybody have an idea why it is this much slower under VS?

I really appreciate any kind of hint!

Thanks,

解决方案

Do you use a lot of the standard C++ library? If so, you might want to turn off the "checked iterators" feature that is on by default in Visual C++ (even in Release mode). Put this before including any standard headers:

#define _SECURE_SCL 0

More info here.

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