# Julia Beginner (from Python): Numba outperforms Julia in rewrite. Any tips to improve performance?

**URL:** <https://discourse.julialang.org/t/julia-beginner-from-python-numba-outperforms-julia-in-rewrite-any-tips-to-improve-performance/66414>\
**Category:** Performance\
**Tags:** benchmark, python, tullio, loopvectorization\
**Created:** [August 15, 2021, 12:00am UTC](https://discourse.julialang.org/t/julia-beginner-from-python-numba-outperforms-julia-in-rewrite-any-tips-to-improve-performance/66414 "2021-08-15T00:00:50Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![tkf](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tkf/32/17635_2.png) [@tkf](https://discourse.julialang.org/u/tkf)\
**Post date:** [August 15, 2021, 2:27am UTC](https://discourse.julialang.org/t/julia-beginner-from-python-numba-outperforms-julia-in-rewrite-any-tips-to-improve-performance/66414/3 "2021-08-15T02:27:40Z")

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FYI `@inbounds Threads.@threads for` does not remove the bound check in the loop body. See: [What is the cause of this performance difference between Julia and Cython? - #4 by tkf](https://discourse.julialang.org/t/what-is-the-cause-of-this-performance-difference-between-julia-and-cython/58886/4)

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