# Very large performance difference between Turing and Stan \[Gaussian Process\]

**URL:** <https://discourse.julialang.org/t/very-large-performance-difference-between-turing-and-stan-gaussian-process/93663>\
**Category:** Statistics\
**Tags:** turing, stan\
**Created:** [January 27, 2023, 9:28pm UTC](https://discourse.julialang.org/t/very-large-performance-difference-between-turing-and-stan-gaussian-process/93663 "2023-01-27T21:28:28Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![dlakelan](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dlakelan/32/8491_2.png) [@dlakelan](https://discourse.julialang.org/u/dlakelan)\
**Post date:** [January 28, 2023, 2:42am UTC](https://discourse.julialang.org/t/very-large-performance-difference-between-turing-and-stan-gaussian-process/93663/4 "2023-01-28T02:42:27Z")

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I remember having a huge slowdown with truncated normals…

> [@Making Turing Fast with large numbers of parameters?](https://discourse.julialang.org/t/making-turing-fast-with-large-numbers-of-parameters/69072/49):
>
> It’s a bit difficult to find, but PRs to the performance section of the website can be made against the [https://github.com/TuringLang/Turing.jl/blob/master/docs/src/using-turing/performancetips.md](https://github.com/TuringLang/Turing.jl/blob/master/docs/src/using-turing/performancetips.md) file.

See if anything discussed there helps?

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