# Parallelization from v1.1.1 to v1.4

**URL:** <https://discourse.julialang.org/t/parallelization-from-v1-1-1-to-v1-4/36365>\
**Category:** Performance\
**Created:** [March 22, 2020, 9:04pm UTC](https://discourse.julialang.org/t/parallelization-from-v1-1-1-to-v1-4/36365 "2020-03-22T21:04:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![swishmas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/swishmas/32/8803_2.png) [@swishmas](https://discourse.julialang.org/u/swishmas)\
**Post date:** [March 22, 2020, 9:04pm UTC](https://discourse.julialang.org/t/parallelization-from-v1-1-1-to-v1-4/36365/1 "2020-03-22T21:04:00Z")

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I just want to know if I missed anything or if there’s a future fix planned. I have code written in v1.1.1 that uses a lot of the multi-threading parallelization listed [here](https://docs.julialang.org/en/v1/manual/parallel-computing/)

When v1.2 and v1.3 came out, there was an attempt to [make everything thread-safe.](https://julialang.org/blog/2019/07/multithreading/). However, this also [made things slower](https://github.com/JuliaLang/julia/issues/32701). My code is about 3-5x slower as of v1.4.

I’m not sure that I can convert everything to the alternate parallelization system and was hoping that one of these releases would cure the inefficiency, but I haven’t heard anything about it. Is anyone working on this? Can I get involved to fix this somehow? Is there an alternate systems that people have started using instead?