. Author manuscript; available in PMC: 2020 Sep 4.

Published in final edited form as: Proc ACM Int Conf Inf Knowl Manag. 2018 Oct;2018:793–802. doi: 10.1145/3269206.3271775

Table 6:

Speedups (running time of SPARTan divided by running time of COPA for various constraint configurations) and corresponding p-values. COPA is faster (up to 2.5×) on the majority of constraint configurations as compared to the baseline SPARTan approach which can only handle non-negativity constraints.

		Non-neg COPA	Smooth COPA	Sparse COPA	Smooth & Sparse COPA
CHOA, R=15	Speed up	1.21	1.08	1.57	1.31
CHOA, R=15	p-value	0.163	0.371	0.005	0.048
CHOA, R=40	Speed up	1.38	1.29	2.31	1.69
CHOA, R=40	p-value	0.01	0.032	0.0005	0.002
CMS, R=15	Speed up	1.21	0.84	1.82	1.36
CMS, R=15	p-value	0.125	1.956	0.002	0.018
CMS, R=40	Speed up	1.57	0.87	2.51	0.99
CMS, R=40	p-value	0.00005	1.986	0.000004	1.08