tree 1471998bea4ebf0610a6400f10018f0d18fdd8e1
parent a599a55c65c378621979a59c2ccc5f654ab543a0
author Matthias Boehm <mboehm7@gmail.com> 1598190706 +0200
committer Matthias Boehm <mboehm7@gmail.com> 1598190706 +0200

[MINOR] Performance binary cell operations sparse matrix-row vector

This patch improves the performance of element-wise binary operations
for sparse matrix, dense row vector, and dense outputs by adding a
dedicated kernel.

For a 1M x 1K sparse matrix with sp=0.1 and X - colMeans(X), this patch
improved performance from 11.3s to 5.9s (single-threaded). This is now
in the ballpark of dense operations of similar shape.