An Automatic Source Code Vulnerability Detection Approach Based on KELM

Table 9

Efficiency of different symbolization levels on preprocessing.

Dataset	Symbolization group	Training time (s)
BE-ALL	F	1721.9
	F + V	1645.5
	F + T	1674.1
	F + V + T	1639.3
RM-ALL	F	930.8
	F + V	920.8
	F + T	908.1
	F + V + T	907.4
HY-ALL	F	2762.7
	F + V	2693.6
	F + T	2692.2
	F + V + T	2665.2