Table 4.

Search time for each iteration.

Feature selection method	Search time (seconds)
	kNNa	NBb	RFc
Wrapper	23	159	876
FESCOMd	13	71	541

^akNN: k-nearest neighbor.

^bNB: Naïve Bayes.

^cRF: random forest.

^dFESCOM: hybrid feature selection method by combining filter and wrapper methods.