if it does not help please send us model.
I do not see any problem with Newton Raphson algorithm.
all cases, Newton Raphson, Sparse Solver - 2227seconds
simple cases set as auxiliary, Newton Raphson, multithreaded solver - 1700seconds - such model here :
I is prolem again, when change foundation raft to foundation footing???????
File modol foundation Footing. Please help.