# An embarrassingly parallel problem: threads or MPI?

**URL:** <https://discourse.julialang.org/t/an-embarrassingly-parallel-problem-threads-or-mpi/48049>\
**Category:** Performance\
**Tags:** parallel, multithreading, mpi\
**Created:** [October 9, 2020, 4:28pm UTC](https://discourse.julialang.org/t/an-embarrassingly-parallel-problem-threads-or-mpi/48049 "2020-10-09T16:28:02Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![mcreel](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mcreel/32/30088_2.png) [@mcreel](https://discourse.julialang.org/u/mcreel)\
**Post date:** [June 10, 2021, 4:21pm UTC](https://discourse.julialang.org/t/an-embarrassingly-parallel-problem-threads-or-mpi/48049/13 "2021-06-10T16:21:54Z")

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In case anyone stumbles on this, I was not aware that randn is not thread safe. Thread performance could probably be improved using information here: [Question about Multi-threading Performance](https://discourse.julialang.org/t/question-about-multi-threading-performance/12075)

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