Hypertree Decompositions Revisited for PGMs
Hypertree Decompositions Revisited for PGMs
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发表时间:
2018-04
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通讯作者:
A. S. Arun;Sai Vikneshwar Mani Jayaraman;C. Ré;A. Rudra
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作者:
A. S. Arun;Sai Vikneshwar Mani Jayaraman;C. Ré;A. Rudra
We revisit the classical problem of exact inference on probabilistic graphical models (PGMs). Our algorithm is based on recent worst-case optimal database join algorithms, which can be asymptotically faster than traditional data processing methods. We present the first empirical evaluation of these new algorithms via JoinInfer, a new exact inference engine. We empirically explore the properties of the data for which our engine can be expected to outperform traditional inference engines refining current theoretical notions. Further, JoinInfer outperforms existing state-of-the-art inference engines (ACE, IJGP and libDAI) on some standard benchmark datasets by up to a factor of 630x. Finally, we propose a promising data-driven heuristic that extends JoinInfer to automatically tailor its parameters and/or switch to the traditional inference algorithms.