it was probably whatever concurrent.futures does. I use plain threads and get great results for anything under 25 threads on a small laptop. you always keep

it was probably whatever concurrent.futures does. I use plain threads and get great results for anything under 25 threads on a small laptop. you always keep the same set of threads running in a pool and use a decent queueing model. certainly, doing that kind of thing with asyncio likely has a lower learning curve because you don't need to worry about "pools of workers" so much. concurrent.futures should do that for you also but that would be the first place I don't trust