问题描述
在使用 WCF 服务时，每次使用它时都创建一个新的服务实例是否更好?还是创建一个并重新使用它更好?为什么两种方法都更好?异步代理是一样的吗?
When working with WCF services, is it better to create a new instance of the service every time you use it? Or is it better to create one and re-use it? Why is either approach better? Is it the same for asynchronous proxies?
推荐答案
除了 Guy Starbuck 提到的一个关键因素是您使用的安全模型(结合会话要求) - 如果您不这样做'如果不重复使用您的代理，就不能重复使用安全会话.
in addition to the things Guy Starbuck mentioned a key factor would be the security model you're using (in conjunction with the session requirements) - if you don't re-use your proxy, you can't re-use a security sessions.
这意味着客户端必须在每次调用时都进行身份验证，这很浪费.
This means that the client would have to authenticate itself with each call which is wasteful.
但是，如果您决定这是您想要做的，请确保将客户端配置为不建立安全上下文(因为您永远不会使用它)，这将为您节省几次往返服务器的时间:-)
If, however, you decide this is what you wish to do, make sure to configure the client to not establish a security context (as you will never use it), this will save you a couple of roundtrips to the server :-)
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