ServiceLocator.Current.GetInstance导致呼叫ObjectBuilder2.PolicyList.GetNoDefault数量过多

问题描述

在我MVC4，使用Unity IoC容器.NET4.5的Web应用程序，在方法IoCContainerFactory.GetControllerInstance（），我们使用ServiceLocator.Current.GetInstance得到控制器实例：

In my MVC4, .NET4.5 web app using Unity IoC container, in the method IoCContainerFactory.GetControllerInstance() we use ServiceLocator.Current.GetInstance to get the controller instance:

public class IoCControllerFactory : DefaultControllerFactory
{
    protected override IController GetControllerInstance(
         System.Web.Routing.RequestContext requestContext, Type controllerType)
    {
        // snip other code
        // this is the problem line:
        return ServiceLocator.Current.GetInstance(controllerType) as IController;
    }
}

但是，这一直表现得太慢。使用JetBrains公司DotNetTrace产品我发现ServiceLocator.Current.GetInstance似乎调用ObjectBuilder2.PolicyList.GetNoDefault超过一百万次。我怎样才能弄清楚，为什么它正在那么多电话，我能做些什么来解决这个问题？附截图显示来自dotnetTrace输出：

But this has been performing too slowly. Using JetBrains DotNetTrace product I've found that ServiceLocator.Current.GetInstance appears to be calling ObjectBuilder2.PolicyList.GetNoDefault more than one million times. How can I figure out why it is making so many calls, and what can I do to fix this problem? Attached screenshot shows the output from dotnetTrace:

和什么样的政策是试图在方法获得 PolicyList.GetNoDefault ？我我知道它正在试图找到我也许可以改变这种政策，它确实需要检查很多次什么样的政策。

And what policy is it trying to get in the method PolicyList.GetNoDefault? I I knew what policy it was trying to find I could perhaps change that policy so that it does need to be checked so many times.

推荐答案

这个问题一直没有解决，我们结束了赞成LightInject，这是一个显著更快IoC实现的下探团结，因为在这里看到：

This problem was never solved and we ended up dropping Unity in favor of LightInject, which is a significantly faster IoC implementation, as seen here:

IoC容器基准 - 性能比较

我们也有类似的改进，当我们实现LightInject。

We had similar improvements when we implemented LightInject.

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