In this paper, it is aimed to computationally conduct a performance benchmarking for the steepest descent and three well-known conjugate gradient methods (i.e., Fletcher-Reeves, Polak-Ribiere Hestenes-Stiefel) along with six different step length calculation techniques/conditions, namely Backtracking, Armijo-Backtracking, Goldstein, weakWolfe, strongWolfe, Exact local minimizer in unconstrained...