Linear Regression Processor

Hello community I had a question about the parameters in the Improved Linear Regression Processor. When the solver name is set to ‘auto’ what method is used to minimize the loss function? When I hover my mouse over the question mark in the configuration screen it says : “solver algorithm is selected automatically”. The other two options are l-bfgs and the normal equation. I am guessing it chooses one of those two. If so then how does know which to choose? Perhaps I am missing something obvious here, or I have big misunderstanding somewhere, any clarity would be much appreciated. Thank you all very much.