Table 2.

Execution time

Method	Colon	Leukemia	SRBCT	Prostate
RF-ACE	40’	24’	57’	2 h 47’
Boruta Ferns depth 1	01’	01’	01’	03’
Boruta Ferns depth 7	05’	05’	11’	09’
Boruta RF Gini	2 h 27’	2 h 19’	10 h 52’	30 h 48’
Boruta RF Raw	3 h 30’	2 h 43’	14 h 35’	40 h 23’
Boruta RF Norm.	3 h 28’	2 h 34’	16 h 04’	35 h 27’
RFE Ferns depth 1	10’	08’	15’	6 h 43’
RFE Ferns depth 7	10’	08’	16’	7 h 24’
RFE RF Gini	21’	16’	31’	13 h 34’
RFE RF Raw	21’	16’	33’	13 h 49’
RFE RF Norm.	22’	17’	32’	13 h 17’
RRF	03’	02’	04’	1 h 04’
No. features	2000	3051	1586	12533
No. objects	62	38	83	102

The execution time of selected algorithms, represented as the mean over 30 bootstrap iterations. All algorithms investigated in this study were run single-threaded.