# PackageCompiler uses no paralelism

**URL:** <https://discourse.julialang.org/t/packagecompiler-uses-no-paralelism/46590>\
**Category:** General Usage\
**Created:** [September 14, 2020, 3:13pm UTC](https://discourse.julialang.org/t/packagecompiler-uses-no-paralelism/46590 "2020-09-14T15:13:18Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![xor0110](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/xor0110/32/7926_2.png) [@xor0110](https://discourse.julialang.org/u/xor0110)\
**Post date:** [September 14, 2020, 3:13pm UTC](https://discourse.julialang.org/t/packagecompiler-uses-no-paralelism/46590/1 "2020-09-14T15:13:18Z")

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I’m finally learning to use PackageCompiler, things seem to be working great so far. I just noticed that at the “creating system image object file” step building an app for my project there seems to be no parallelism. I assume there may be chances to parallelize stuff there, not unlike a “make -j6”… Is it actually not simple to parallelize this, am I missing some configuration, or is it just a feature request that nobody has worked on it yet?

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**Author:** ![kristoffer.carlsson](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kristoffer.carlsson/32/22_2.png) [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)\
**Post date:** [September 14, 2020, 3:22pm UTC](https://discourse.julialang.org/t/packagecompiler-uses-no-paralelism/46590/2 "2020-09-14T15:22:12Z")

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> [@xor0110](#):
>
> Is it actually not simple to parallelize this, am I missing some configuration, or is it just a feature request that nobody has worked on it yet?

It is not simple. It uses the same mechanism as Julia does to compile itself and that is not multithreaded either.