Multi-threading Problem

[kenjo]

Hi there,

I am executing a call to a function contained within a 3rd Party .dll and it is running extremely slowly when executed by a thread.

Calling the function using a single thread works fine, executing in 20ms as expected. When I create and execute two threads, the time for the function to execute is about 40-60 ms for each thread. It varies greatly but never close to 20ms.


Basically I have the following:

ThirdPartObject obj1 = new ThirdPartObject();
ThirdPartObject obj2 = new ThirdPartObject();

public void Run()
{

ThreadStart worker1 = delegate { RunObj1(); };
new Thread(worker1).Start();


ThreadStart worker2 = delegate { RunObj2(); };
new Thread(worker2).Start();

}

public void RunObj1()
{
this.obj1.Execute();
}


public void RunObj2()
{
this.obj2.Execute();
}


if I replace the code in RunObj1 and RunObj2 with say a for-loop which adds numbers, it behaves as expected and both RunObj1 and RunObj2 run in parallel.

Any ideas?

Thanks.