# BLAS - MKL - OpenBLAS

**URL:** <https://discourse.pymc.io/t/blas-mkl-openblas/10526>\
**Category:** v5\
**Tags:** development\_env\
**Created:** [October 4, 2022, 9:46am UTC](https://discourse.pymc.io/t/blas-mkl-openblas/10526 "2022-10-04T09:46:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![timrio](https://avatars.discourse-cdn.com/v4/letter/t/7feea3/32.png) [@timrio](https://discourse.pymc.io/u/timrio)\
**Post date:** [October 4, 2022, 9:46am UTC](https://discourse.pymc.io/t/blas-mkl-openblas/10526/1 "2022-10-04T09:46:36Z")

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Hello 🙂

I have noticed that PyMC 4 gets installed by default with OpenBlas (when running python -m aesara.misc.check\_blas)

I would like to use MKL instead of OpenBlas but it do not manage to switch, do you know how I could proceed ?

From another project, I noticed that MKL is sometimes much quicker.

Do you know (or have documentation) about those two libraries?

Many thanks in advance 🙂