Visual Studio 2008 C ++代码比Visual Studio 2005慢 [英] Visual Studio 2008 C++ code slower than Visual Studio 2005

问题描述

在重新编译了一些性能关键代码之后，我注意到用Visual Studio 2008 Pro在发布模式下创建的二进制文件比使用Visual Studio 2005编译的完全相同的代码慢大约5-15％.运行一个大循环并传递字符串的项目，我可以看到性能差异.

After recompiling some of our performance critical code I've noticed that the binaries created in Release mode with Visual Studio 2008 Pro are about 5-15% slower than the exact same code compiled with Visual Studio 2005. Just creating a very simple project running a large loop passing strings I can see performance differences.

还有其他人看到吗?

谢谢

戴夫.

推荐答案

我在Visual Studio 2008中遇到相同的问题.我创建了一个棋盘游戏程序.在发布模式下使用Visual Studio 2005进行编译，我获得了出色的搜索性能；在Core 2 Duo上每秒大约有400万个节点.在发布模式下用Visual Studio 2008重新编译完全相同的源代码，我得到的性能非常差；每秒少于100万个节点，或者性能下降超过75％.这是不可接受的.

I am experiencing the same issue with Visual Studio 2008.  I created a board game program.  Compiling with visual studio 2005 in release mode, I get great search performance; on the order of 4 million nodes per second on a Core 2 Duo.  Re-compiling the exact same source code with Visual Studio 2008 in release mode I get very dismal performance; well less than 1 million nodes per sec, or a performance drop exceeding 75%.  This is unacceptable.

这篇关于Visual Studio 2008 C ++代码比Visual Studio 2005慢的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！