Best budget processing

I am looking for a budget phone for my 10 year old. When comparing specs I am not educated enough to evaluate the processors. Which, combined with the RAM, is most important on the list for him. He is like his dad and doesn’t have great patients when things lag or take a while to load.

Camera and screen need to be ok to decent. He mostly uses it for communication and some playing mobile games.

What’s the best bang for the buck when it comes to processing power?