# SIMD and compiled code

**URL:** <https://discourse.julialang.org/t/simd-and-compiled-code/52082>\
**Category:** Performance\
**Tags:** simd\
**Created:** [December 19, 2020, 9:30am UTC](https://discourse.julialang.org/t/simd-and-compiled-code/52082 "2020-12-19T09:30:08Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![carstenbauer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/carstenbauer/32/4981_2.png) [@carstenbauer](https://discourse.julialang.org/u/carstenbauer)\
**Post date:** [December 19, 2020, 9:46am UTC](https://discourse.julialang.org/t/simd-and-compiled-code/52082/2 "2020-12-19T09:46:08Z")

</div>

I had a related question a few years back. There I asked whether it matters which compiler (`icc` vs `gcc`) one uses when building Julia. The answer was pretty much no.

> [@Building Julia: Does the compiler matter?](https://discourse.julialang.org/t/building-julia-does-the-compiler-matter/6858):
>
> I want to use Julia with MKL. As has been discussed, one currently has two options: use Julia Pro or build Julia from sources and setting flags. For many reasons I want to take the second approach. Regarding performance, what compiler should I use to build Julia, icc or gcc? Does the choice influence performance at all. [Here](https://discourse.julialang.org/t/building-julia-0-6-0-with-mkl-on-osx-10-12-5/5073/5) it has been mentioned that “Code generation is doen by LLVM so runtime performance AFAIU, run time performance should not depend on what you use to compile LLVM / Julia wit…

---

_[View the full topic](https://discourse.julialang.org/t/simd-and-compiled-code/52082)._