可能重复：   性能成本中＆lsquo的;尝试＆rsquo的;

我被告知，加入try catch块增加主要性能成本的1000倍，比不慢的顺序，在一个例子为一百万的循环。这是真的吗？

I am being told that adding a try catch block adds major performance cost in the order of 1000 times slower than without, in the example of a for loop of a million. Is this true?

这难道不是最好使用try catch块尽可能？

Isn't it best to use try catch block as much as possible?

推荐答案

从 MSDN网站

查找和设计走   异常沉重code能导致   体面PERF获胜。请记住，   这有没有关系的try / catch   块：你只能承担的费用时，   实际的异常。您   可以使用尽可能多的try / catch块，   你想。使用异常   无偿为你失去   性能。例如，你应该   远离像使用   例外的控制流。

Finding and designing away exception-heavy code can result in a decent perf win. Bear in mind that this has nothing to do with try/catch blocks: you only incur the cost when the actual exception is thrown. You can use as many try/catch blocks as you want. Using exceptions gratuitously is where you lose performance. For example, you should stay away from things like using exceptions for control flow.

另请参阅这些相关的SO问题：(1) （2）的（3）和(4).

Also see these related SO questions: (1) (2) (3) and (4).