# Slowdown \_after\_ package load

**URL:** <https://discourse.julialang.org/t/slowdown-after-package-load/33533>\
**Category:** New to Julia\
**Created:** [January 19, 2020, 12:59am UTC](https://discourse.julialang.org/t/slowdown-after-package-load/33533 "2020-01-19T00:59:02Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![tim.holy](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tim.holy/32/52_2.png) [@tim.holy](https://discourse.julialang.org/u/tim.holy)\
**Post date:** [January 25, 2020, 12:10pm UTC](https://discourse.julialang.org/t/slowdown-after-package-load/33533/9 "2020-01-25T12:10:55Z")

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For me, just `using MCMCChains` causes a multi-minute latency for tab-completion, but not if I’d first `using`ed all of its dependencies. Might be completely unrelated, but see [https://github.com/JuliaLang/julia/issues/34098](https://github.com/JuliaLang/julia/issues/34098).

I ran [Pirate Hunter](https://discourse.julialang.org/t/pirate-hunter/20402) on MCMCChains. It came up with several hits, but none of them looked like obvious candidates for the cause.

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