For RF, the parameter of ntrees is fixed to 500 which is also used by Zhang et al. (2016a). Using larger values increases computational cost but with negligible improvement in accuracy, For GB, the parameter of nrounds (meaning the maximum number of iterations) is fixed to 500 prior to...
and caused only a tiny fraction of the environmental cost of a car during manufacturing. At the same time, it saves you at least 22 thousand dollars up front, followed by saving you an additional $3000-$7000 per year in gas, insurance, maintenance, repairs, parking, tolls... ...