我最近搬到C＃.NET 4。

I have recently moved to C#.net 4.

我爱的Parallel.For，但不知道何时使用，何时不。 我知道，当顺序不是对我很重要 - 我会用它

I love Parallel.For, but not sure when to use and when not to. I know that when order is not important for me - I'll use it.

但是否有关于与Parallels合作的开销任何测试？意思是，如果我的循环只运行10次（和执行非常少的逻辑） - 我应该避免的Parallels？有没有什么经验法则？

But are there any tests regarding the overhead of working with Parallels? Meaning, if my loop runs only 10 times (and performs very little logic) - should I avoid Parallels? Are there any thumb rules?

推荐答案

我会避免使用的Parallel.For ，除非性能是一个问题。

I would avoid using Parallel.For unless performance is an issue.

这同时运行在普通难度比写单线程code写作code。此外，如果你因并发性问题上做出的错误就很难进行调试。比如可能会出现的错误只是有时并不能轻易复制的。除非你在提高性能的特殊需要，我建议你保持简单，在单个线程使用普通的循环。

Writing code that runs concurrently is in general harder than writing single threaded code. Furthermore if you make an error due to a concurrency issue it can be difficult to debug it. For example the bug might occur only sometimes and not be easily reproducible. Unless you have a specific need for increased performance I would suggest that you keep it simple and use an ordinary loop on a single thread.