Malicious Encryption Traffic Detection Based on NLP

Table 4

Training time of each classifier.

Detection method	Training time (TF-IDF) (s)	Training time (encoding)
Gradient boosting	46	0.4 s
Random forest	83	6.5 s
AdaBoost	578	3.3 s
Ensemble learning	3537	11.27 s
CNN	752	Huge