Too much execute find_nodes when I use the nonNegativeDerivative() function.

[youtome]

Target used in the request 'sum Series (nonNegative Derivative (servers. *. Order. *. *. *. Count))' it is.
leaf nodes number is about 500.
At a time to a request for a large amount of the leaf node.
Can you reduce requests to the cyanite using leaf node cache?
Thank you.