# Why is this simple function twice as slow as its Python version

**URL:** <https://discourse.julialang.org/t/why-is-this-simple-function-twice-as-slow-as-its-python-version/59004>\
**Category:** Performance\
**Tags:** question\
**Created:** [April 10, 2021, 6:58pm UTC](https://discourse.julialang.org/t/why-is-this-simple-function-twice-as-slow-as-its-python-version/59004 "2021-04-10T18:58:14Z")\
**Posts on this page:** 1\
**Showing post:** 97

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**Author:** ![RoyiAvital](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/royiavital/32/571_2.png) [@RoyiAvital](https://discourse.julialang.org/u/RoyiAvital)\
**Post date:** [April 12, 2021, 2:08pm UTC](https://discourse.julialang.org/t/why-is-this-simple-function-twice-as-slow-as-its-python-version/59004/97 "2021-04-12T14:08:34Z")

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By the way, I think it is a classic example for something like [Batch Mode](https://discourse.julialang.org/t/optimization-based-on-intel-mkl-matrix-multiplication-batch-mode/11989) (Something similar to what @Elrod did in his code).

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