# Performance Issues - Rayleigh Compressible

**URL:** <https://discourse.julialang.org/t/performance-issues-rayleigh-compressible/45397>\
**Category:** Performance\
**Tags:** question\
**Created:** [August 23, 2020, 2:15am UTC](https://discourse.julialang.org/t/performance-issues-rayleigh-compressible/45397 "2020-08-23T02:15:27Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![axsano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/axsano/32/18243_2.png) [@axsano](https://discourse.julialang.org/u/axsano)\
**Post date:** [August 23, 2020, 3:20pm UTC](https://discourse.julialang.org/t/performance-issues-rayleigh-compressible/45397/4 "2020-08-23T15:20:53Z")

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I’ve looked for some solution, and I found the repository of JuliaComputing/MKL.jl and this topic " [Unusually bad performance of eigen() compared to eig() in Matlab](https://discourse.julialang.org/t/unusually-bad-performance-of-eigen-compared-to-eig-in-matlab/26433)". After following the tutorial the code is running 3x faster than the first version, here is the benchmark

```julia
BenchmarkTools.Trial: 
  memory estimate: 379.85 MiB
  allocs estimate: 825
  --------------
  minimum time: 9.068 s (1.35% GC)
  median time: 9.068 s (1.35% GC)
  mean time: 9.068 s (1.35% GC)
  maximum time: 9.068 s (1.35% GC)
  --------------
  samples: 1
  evals/sample: 1

```

Many thanks to @kristoffer.carlsson by the repository.

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