1.62s/trial, best loss: 25737.109375333337] best params: {'colsample_bynode': 0.7000000000000001, 'colsample_bytree': 0.9500000000000001, 'eta': 0.05, 'gamma': 8000000.0, 'lambda': 0.8, 'max_depth': 9, 'min_chil