I burned myself with threads back in the day under AIX when I had this process creating and destroying them, and after destroying them they were still visible a

I burned myself with threads back in the day under AIX when I had this process creating and destroying them, and after destroying them they were still visible and their resources still there. A few posts on Usenet (good times!) and knowledgeable people instructed me on what a thread pool was and why I should have used one instead of creating and destroying threads. I can't give more details, that was like 25 years ago and my memory modules have no parity check, but the experience was very instructional.