# What to do since CSR matrixes are not in Sparse Arrays?

**URL:** <https://discourse.julialang.org/t/what-to-do-since-csr-matrixes-are-not-in-sparse-arrays/53991>\
**Category:** General Usage\
**Tags:** question\
**Created:** [January 26, 2021, 3:49pm UTC](https://discourse.julialang.org/t/what-to-do-since-csr-matrixes-are-not-in-sparse-arrays/53991 "2021-01-26T15:49:10Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![andfranklin](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/andfranklin/32/20078_2.png) [@andfranklin](https://discourse.julialang.org/u/andfranklin)\
**Post date:** [January 30, 2021, 7:18am UTC](https://discourse.julialang.org/t/what-to-do-since-csr-matrixes-are-not-in-sparse-arrays/53991/6 "2021-01-30T07:18:05Z")

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I ran some benchmarks using the suggestions of @rdeits and @Oscar_Smith . The example matrix is the 2D finite-difference laplacian on a grid of 10,000 x 10,000 points. The “CSR” matrix is the transpose of the CSC matrix. Below are the benchmark results and a conclusion. All times are the minimum benchmark time:

 ![Screen Shot 2021-01-30 at 1.09.31 AM](https://global.discourse-cdn.com/julialang/original/3X/6/f/6f1554528e24b394cd642f51501a28b64571c382.jpeg)

Thoughts? I can provide the pluto notebook upon request.

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