Why so much difference in performance between Thread and Task?

Question

Windows 7, Intel CORE i3, 64 bit, RAM 4Gb, 2.27 GHz
.NET Framework 4.0

I have the following code:

static void Main(string[] args)
{
             


        

Answer 1

Every time you start a Task it goes into a pool to be served by a number of threads, many of which may be pre-created. There is an M:N ratio of tasks to threads in the pool.

Every time you start a Thread it creates a new thread and all of the overhead associated with thread creation. Since you are explicitly creating a thread, there is a 1:1 ratio of threads.

The closer the ratio of tasks to threads reaches 1, the "slower" task startup it will take. In reality, the ThreadPool ensures the ratio stays much higher than 1.