Performance and parameter study of the DCR, the L.A.Cosmic, and the PyCosmic algorithms applied to simulated VIMOS IFU data in the MR mode with θ = 3 pixels. The first row of all panels compares the detection rate (P_d) of cosmics, the second row compares the false detection rate (P_f), and the third row shows the combined efficiency (ϵ). The primary parameter that controls the performance of the algorithms is varied along the abscissa of each column of panels, while a secondary parameter is shown as different symbols connected by dotted lines as assigned in the legend.