# Slow sparse matrix-vector product with symmetric matrices

**URL:** <https://discourse.julialang.org/t/slow-sparse-matrix-vector-product-with-symmetric-matrices/3968>\
**Category:** General Usage\
**Created:** [May 29, 2017, 5:21am UTC](https://discourse.julialang.org/t/slow-sparse-matrix-vector-product-with-symmetric-matrices/3968 "2017-05-29T05:21:37Z")\
**Posts on this page:** 1\
**Showing post:** 33

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**Author:** ![mohamed82008](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mohamed82008/32/18171_2.png) [@mohamed82008](https://discourse.julialang.org/u/mohamed82008)\
**Post date:** [January 15, 2018, 3:35pm UTC](https://discourse.julialang.org/t/slow-sparse-matrix-vector-product-with-symmetric-matrices/3968/33 "2018-01-15T15:35:18Z")

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Any update on this? I can still confirm that `Symmetric` slows down the matrix-vector multiplication by a factor of 100 on my machine.

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