My app mem usage is growing using pthread?

You are potentially creating threads when the thread is still running/hasn't started. This is undefined behavior. (Read: very bad).

Before looping around to create new threads, make sure the present ones have finished.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.