# Multi-threading of julia-1.8.5 does not improve speed when combined with BLAS

**URL:** <https://discourse.julialang.org/t/multi-threading-of-julia-1-8-5-does-not-improve-speed-when-combined-with-blas/97568>\
**Category:** New to Julia\
**Created:** [April 17, 2023, 9:53am UTC](https://discourse.julialang.org/t/multi-threading-of-julia-1-8-5-does-not-improve-speed-when-combined-with-blas/97568 "2023-04-17T09:53:11Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![gdalle](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gdalle/32/27854_2.png) [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Post date:** [April 21, 2023, 10:05pm UTC](https://discourse.julialang.org/t/multi-threading-of-julia-1-8-5-does-not-improve-speed-when-combined-with-blas/97568/15 "2023-04-21T22:05:45Z")

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Are you sure this is unexpected? [Matrix multiplication is slower when multithreading in Julia - #12 by carstenbauer](https://discourse.julialang.org/t/matrix-multiplication-is-slower-when-multithreading-in-julia/56227/12)

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