Parallel Task How to improve performance of this function

I'd like a suggestion to improve the performance of these methods. It has taken them too long to finish. Please if the question is not very clear just to mention that I try to improve I will make some images available with the codes. https://i.stack.imgur.com/lJ8zy.png "> Well here's basically the loop I do a few checks and transfer to the appropriate treatment Here is the update I'm doing Hereismethodthatinstantiatestheclassthatcallsdaotoavoidblockingbyanyresource I've edited 23 / 09- Here I had to limit the simultaneous tasks because I was given an exception if I left without paralleloption