# About reproducibility of Julia program run times

**URL:** <https://discourse.julialang.org/t/about-reproducibility-of-julia-program-run-times/127613>\
**Category:** Performance\
**Created:** [April 2, 2025, 12:37am UTC](https://discourse.julialang.org/t/about-reproducibility-of-julia-program-run-times/127613 "2025-04-02T00:37:12Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![\_bernhard](https://avatars.discourse-cdn.com/v4/letter/_/bc79bd/32.png) [@\_bernhard](https://discourse.julialang.org/u/_bernhard)\
**Post date:** [April 9, 2025, 4:12pm UTC](https://discourse.julialang.org/t/about-reproducibility-of-julia-program-run-times/127613/21 "2025-04-09T16:12:57Z")

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And soon Revise will also be able to update `structs`.

The groundwork has already been laid. 🙂

For reference, the most recent topic on these developments.

> [@Redefining structure (again).. what' the current situation and what to expect?](https://discourse.julialang.org/t/redefining-structure-again-what-the-current-situation-and-what-to-expect/127859):
>
> Recently there have been a lot of discussions about the possibility and the implementations allowing Struct redefinition ([1](https://discourse.julialang.org/t/ann-strucrev-revise-type-definitions-as-you-go/109959), [2](https://discourse.julialang.org/t/thoughts-and-tempering-expectations-on-redefining-structs/101190/36), [3](https://discourse.julialang.org/t/this-month-in-julia-world-2024-05/115278), …) and some related pull requests/issues have been closed ([1](https://github.com/JuliaLang/julia/pull/54654),[2](https://github.com/JuliaLang/julia/issues/40399),…) So, which is the situation now? Struct redefinition with Revise will just work ( rofl )? Will I need Julia 1.12 for it to work, or will I still need another package to add some temporary macro ?

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