是什么会导致在.NET 4.5下完全正常的代码在3.5以下的情况下变得CPU贪婪呢？

Question

I'm working with netmq 's latest pre-release and I'm finding the below program will consume virtually no CPU under .NET 4.5 yet is fixed at 13% under version 3.5 of the framework.

class Program
{
    static void Main(string[] args)
    {
        ThreadPool.QueueUserWorkItem((o) =>
        {
            using (NetMQContext context = NetMQContext.Create())
            {
                using (NetMQSocket requester = context.CreateRequestSocket()) // creating this socket seems to fix cpu consumptio at 13%.. why?
                {
                    Console.WriteLine("LOADED");
                    Console.ReadKey();
                }
                Console.WriteLine("DISPOSED SOCKET");
                Console.ReadKey();
            }
            Console.WriteLine("DISPOSED CONTEXT");
            Console.ReadKey();
        });

        while (true) Thread.Sleep(1000);
    }
}

Does anyone know of a potential reason for this unexpected behaviour?

Edit: Confirmed this occurs in .NET 3.5 and does not occur in 4 or 4.5

Answer 1

So the problem seems to be that in .Net 3.5 there is a bug with Socket.Select.

Socket.Select() with -1 timeout not blocking at all