Table 2. Time (in seconds) required to compute the score of all non-existing links using Resource Allocation index on a single core.

Network	LinkPred (C++)	LinkPred (Java)	LinkPred (Python)	Python package NetworkX	R package linkprediction	Python package linkpred	Python package scikit-network
Political Blogs	0.02	0.03	0.14	1.83	3.70	0.68	3.13
Diseasome	0.04	0.16	0.86	6.33	2.53	1.26	14.98
Email	0.05	0.12	0.56	7.78	6.88	1.60	9.63
Web Edu	0.14	0.72	4.16	36.92	8.67	5.31	68.71
Java	0.08	0.23	1.04	17.08	55.54	8.95	17.82
Power	0.36	1.83	11.05	80.55	3.80	11.16	183.71
Erdos 02	0.76	3.62	21.71	179.75	44.15	30.42	358.37
World Air	0.31	1.10	5.79	81.06	55.06	11.71	97.91
Oregon	2.32	9.62	56.96	525.76	573.47	157.60	936.84
PGP	2.42	9.12	51.31	603.75	35.74	57.32	862.56
Spam	0.99	2.33	10.33	318.16	199.83	42.80	171.68
Indochina 2004	2.48	10.04	59.16	1,086.26	91.95	74.61	1,003.82