Legend: ○: BFGS-scipy Baudis, ♢: L-BFGS-B-scipy Baudis, ☆: BFGS-M-17 Blelly, +: BFGS-P-09 Blelly, ▼: BFGS-P-Instances Blelly, x: BFGS-P-StPt Blelly, △: BFGS-P-range Blelly, ◇: BFGS-scipy-2019 Varelas, ◁: L-BFGS-B-scipy-2019 Varelas, ▷: BFGS ros noiseless