[MADLIB-1067] Use Eigen in the implementation of array_dot

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: v3.0.0
• Component/s: Module: Linear-Algebra Functions
• Assignee: Unassigned
• Reporter: Mauricio Scheffer
• Created: 10/Feb/17 10:28
• Updated: 07/Aug/18 19:44

Description

Currently (MADlib 1.9.1) cosine_similarity has better performance than array_dot.

It seems that array_dot should be using the dot product implementation from Eigen, like cosine_similarity.

See http://mail-archives.apache.org/mod_mbox/incubator-madlib-user/201702.mbox/%3CCAAKWcNHoxdVdEjRsAOjC9Zukjo2e5cLBP2XPFFC6f8XiXSMykA%40mail.gmail.com%3E