# Latest

**URL:** https://discourse.julialang.org/latest.md?page=130

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 131

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## [Faster MPI Integration in Dagger](https://discourse.julialang.org/t/faster-mpi-integration-in-dagger/130784)

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**Author:** [@yanzin00](https://discourse.julialang.org/u/yanzin00)\
**Replies:** 9\
**Last updated:** [July 27, 2025, 7:39pm UTC](https://discourse.julialang.org/t/faster-mpi-integration-in-dagger/130784 "2025-07-27T19:39:21Z")

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Hello everyone! I hope you’re all doing well as you continue developing your Julia code. I am writing this post to share my progress with the Google Summer of Code project, specifically regarding the MPI integration in D…

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## [Function fails when used in precompile workload](https://discourse.julialang.org/t/function-fails-when-used-in-precompile-workload/131095)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 7\
**Last updated:** [July 27, 2025, 5:55pm UTC](https://discourse.julialang.org/t/function-fails-when-used-in-precompile-workload/131095 "2025-07-27T17:55:35Z")

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I have the following function: function str2type(name) typename = Symbol(name) t = getfield(Main, typename) instance = t() end I need it to get an instance of a type of a marker struct at runtime based on s…

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## [How to fix SSL cert issues in Pkg](https://discourse.julialang.org/t/how-to-fix-ssl-cert-issues-in-pkg/115495)

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**Author:** [@musm](https://discourse.julialang.org/u/musm)\
**Replies:** 9\
**Last updated:** [July 27, 2025, 4:52pm UTC](https://discourse.julialang.org/t/how-to-fix-ssl-cert-issues-in-pkg/115495 "2025-07-27T16:52:39Z")

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It seems like there is a clash between the SSL environment variable set by miniconda and the one that Julia is using. I’ve tried setting JULIA\_SSL\_CA\_ROOTS\_PATH="" as suggested however the error persists. ❯ $env:SSL\_C…

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## [Using BinaryBuilder.jl to build librariers for Julia versions \>1.7](https://discourse.julialang.org/t/using-binarybuilder-jl-to-build-librariers-for-julia-versions-1-7/131085)

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**Author:** [@leespen1](https://discourse.julialang.org/u/leespen1)\
**Replies:** 5\
**Last updated:** [July 27, 2025, 4:15pm UTC](https://discourse.julialang.org/t/using-binarybuilder-jl-to-build-librariers-for-julia-versions-1-7/131085 "2025-07-27T16:15:21Z")

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I have some small Fortran scripts that I use in a Julia package I am developing. Currently, I have just compiled them myself into a shared library and used ccall. But I want my package to be deployable on other people’s …

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## [Pkg.activate vs Base.set\_active\_project](https://discourse.julialang.org/t/pkg-activate-vs-base-set-active-project/131111)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 0\
**Last updated:** [July 27, 2025, 3:59pm UTC](https://discourse.julialang.org/t/pkg-activate-vs-base-set-active-project/131111 "2025-07-27T15:59:14Z")

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Can someone please explain the difference between Pkg.activate vs Base.set\_active\_project from a practical perspective? I looked at the source and they do slightly different things (besides setting Base.ACTIVE\_PROJECT\[\])…

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## [Zip with length checking](https://discourse.julialang.org/t/zip-with-length-checking/16395)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 7\
**Last updated:** [July 27, 2025, 2:44pm UTC](https://discourse.julialang.org/t/zip-with-length-checking/16395 "2025-07-27T14:44:35Z")

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Consider a loop for (i, elt) in zip(indexes, itr) do\_something(i, elt) end where Base.IteratorSize(itr) can potentially be Base.HasLength() or Base.SizeUnknown(). I want the code to work for both. indexes is an Ab…

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## [Add Stipple,jl reactive elements to existed Genie.jl app with controllers](https://discourse.julialang.org/t/add-stipple-jl-reactive-elements-to-existed-genie-jl-app-with-controllers/130726)

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**Author:** [@PharmCat](https://discourse.julialang.org/u/PharmCat)\
**Replies:** 6\
**Last updated:** [July 27, 2025, 12:42pm UTC](https://discourse.julialang.org/t/add-stipple-jl-reactive-elements-to-existed-genie-jl-app-with-controllers/130726 "2025-07-27T12:42:14Z")

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So I made Genie.jl app as it described in movie example. With controllers, route.jl, ets… Is it possible to use Stipple.jl functionality in existed project? I have no app.jl in Genie.jl project… Where I should use al…

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## [Problem with Genie.jl newapp\_mvc](https://discourse.julialang.org/t/problem-with-genie-jl-newapp-mvc/130701)

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**Author:** [@PharmCat](https://discourse.julialang.org/u/PharmCat)\
**Replies:** 2\
**Last updated:** [July 27, 2025, 2:04pm UTC](https://discourse.julialang.org/t/problem-with-genie-jl-newapp-mvc/130701 "2025-07-27T14:04:30Z")

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Try to make new App import Pkg path = "D:\\\\GenieTest" cd(path) Pkg.activate("") Pkg.add("Genie") using Genie Genie.Generator.newapp\_mvc("NewApp") And get: Activating new project at \`D:\\GenieTest\\NewApp\\test\` Acti…

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## [Code coverage on Github not displayed](https://discourse.julialang.org/t/code-coverage-on-github-not-displayed/131083)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 2\
**Last updated:** [July 27, 2025, 12:42pm UTC](https://discourse.julialang.org/t/code-coverage-on-github-not-displayed/131083 "2025-07-27T12:42:34Z")

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Until this morning, code coverage for my package GitHub - ufechner7/FLORIDyn.jl: Dynamic wind farm simulation software was displayed fine. Now it says “codecov unknown”. What could be the reason? The tests look fine, fo…

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## [How to plot a impulse unit function using Plots.jl and SymPy.jl?](https://discourse.julialang.org/t/how-to-plot-a-impulse-unit-function-using-plots-jl-and-sympy-jl/131066)

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**Author:** [@jcbritobr](https://discourse.julialang.org/u/jcbritobr)\
**Replies:** 6\
**Last updated:** [July 27, 2025, 10:15am UTC](https://discourse.julialang.org/t/how-to-plot-a-impulse-unit-function-using-plots-jl-and-sympy-jl/131066 "2025-07-27T10:15:54Z")

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Hello. Good evening. I’m doing all exercises of the Sadiku’s book in julia programming. The code is in github Im stucked to plot the impulse unit function after get it differentiating the unit step function. The p…

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## [Broadcasting over an array of custom struct gives type instability](https://discourse.julialang.org/t/broadcasting-over-an-array-of-custom-struct-gives-type-instability/131086)

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**Author:** [@albertomercurio](https://discourse.julialang.org/u/albertomercurio)\
**Replies:** 5\
**Last updated:** [July 27, 2025, 9:02am UTC](https://discourse.julialang.org/t/broadcasting-over-an-array-of-custom-struct-gives-type-instability/131086 "2025-07-27T09:02:52Z")

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Hello, I have a simple problem in Julia v1.10 using Test struct MyMatrix{MT\<:AbstractMatrix} M::MT end Base.:(\*)(A::MyMatrix, x::Number) = MyMatrix(A.M \* x) function f(x) # return \[y / 10 for y in x\] ret…

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## [Docker tags for pre-release Julia versions](https://discourse.julialang.org/t/docker-tags-for-pre-release-julia-versions/129211)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 1\
**Last updated:** [July 27, 2025, 7:12am UTC](https://discourse.julialang.org/t/docker-tags-for-pre-release-julia-versions/129211 "2025-07-27T07:12:09Z")

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Does anyone know why the official Julia Docker images have an -rc tag for the pre-release (currently eg 1.12-rc)? This is a bit cumbersome as when 1.12 is released, I will have to manually remove the -rc from various fi…

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## [Some question on column generation, branch and price, Coluna](https://discourse.julialang.org/t/some-question-on-column-generation-branch-and-price-coluna/131084)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 2\
**Last updated:** [July 27, 2025, 3:55am UTC](https://discourse.julialang.org/t/some-question-on-column-generation-branch-and-price-coluna/131084 "2025-07-27T03:55:10Z")

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Since I’m studying this topic recently. I wonder if there is anyone who is interested and can hence discuss with me. Benders I don’t think this structure is going to be handled by Benders decomposition. For this str…

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## [Gurobi fails to properly report an ERROR, when NonConvex is 0](https://discourse.julialang.org/t/gurobi-fails-to-properly-report-an-error-when-nonconvex-is-0/130932)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 5\
**Last updated:** [July 27, 2025, 3:15am UTC](https://discourse.julialang.org/t/gurobi-fails-to-properly-report-an-error-when-nonconvex-is-0/130932 "2025-07-27T03:15:45Z")

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I discover this behavior of Gurobi, which I think is not exactly expected. According to Gurobi’s doc, if NonConvex is set to 0, then Gurobi should ERROR when a nonconvex quadratic constraint is present. julia\> import J…

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## [Dagger: Benchmarking Broadcast using send\_yield! and recv\_yield!](https://discourse.julialang.org/t/dagger-benchmarking-broadcast-using-send-yield-and-recv-yield/131081)

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**Author:** [@yanzin00](https://discourse.julialang.org/u/yanzin00)\
**Replies:** 0\
**Last updated:** [July 26, 2025, 10:34pm UTC](https://discourse.julialang.org/t/dagger-benchmarking-broadcast-using-send-yield-and-recv-yield/131081 "2025-07-26T22:34:09Z")

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We evaluated the new send\_yield! and recv\_yield! implementations for broadcast operations, noting significant performance improvements over the previous bcast\_yield (which used older send\_yield and recv\_yield). All tests…

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## [Optimizing performance](https://discourse.julialang.org/t/optimizing-performance/131065)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 33\
**Last updated:** [July 26, 2025, 5:54pm UTC](https://discourse.julialang.org/t/optimizing-performance/131065 "2025-07-26T17:54:00Z")

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I try to optimize the performance of the following function: function iterateOPs!(::IterateOPs\_basic, wf::WindFarm, sim::Sim, floris::Floris, floridyn::FloriDyn) # Save turbine OPs tmpOPStates = copy(wf.States\_O…

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## [Creating SBOMs from Manifests -- syft, grype](https://discourse.julialang.org/t/creating-sboms-from-manifests-syft-grype/131078)

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**Author:** [@Allan\_Baker](https://discourse.julialang.org/u/Allan_Baker)\
**Replies:** 2\
**Last updated:** [July 26, 2025, 3:46pm UTC](https://discourse.julialang.org/t/creating-sboms-from-manifests-syft-grype/131078 "2025-07-26T15:46:22Z")

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Has anyone used something like or GitHub - anchore/grype: A vulnerability scanner for container images and filesystems with Julia Packages? I need to create SBOMs to get Julia and its packages approved. I think thes…

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## [Smooth progress bar for multithreads sampling in turing.jl](https://discourse.julialang.org/t/smooth-progress-bar-for-multithreads-sampling-in-turing-jl/130768)

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**Author:** [@Sahil\_Khan](https://discourse.julialang.org/u/Sahil_Khan)\
**Replies:** 6\
**Last updated:** [July 26, 2025, 1:13pm UTC](https://discourse.julialang.org/t/smooth-progress-bar-for-multithreads-sampling-in-turing-jl/130768 "2025-07-26T13:13:42Z")

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Hello everyone, Im working with turing.jl and what I have noticed that when sampling multiple chains with mulithreads option. Progress bar show progress based on number of chains used for example if I use 3 chains then …

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## [Generalized Chi-squared distribution](https://discourse.julialang.org/t/generalized-chi-squared-distribution/106055)

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**Author:** [@heliosdrm](https://discourse.julialang.org/u/heliosdrm)\
**Replies:** 5\
**Last updated:** [July 26, 2025, 7:37am UTC](https://discourse.julialang.org/t/generalized-chi-squared-distribution/106055 "2025-07-26T07:37:25Z")

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Does anybody know some attempt to implement the Generalized Chi-squared distribution in Julia? (First I looked for it in Distributions.jl, but I have not found it there or anywhere else.)

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## [Can I try updating LoopVectorization?](https://discourse.julialang.org/t/can-i-try-updating-loopvectorization/125064)

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**Author:** [@Tarny\_GG\_Channie](https://discourse.julialang.org/u/Tarny_GG_Channie)\
**Replies:** 5\
**Last updated:** [July 26, 2025, 6:45am UTC](https://discourse.julialang.org/t/can-i-try-updating-loopvectorization/125064 "2025-07-26T06:45:27Z")

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After contributing to Stockfish (and failing, though having good runs), I’m back to Julia. LoopVectorization seems to be deprecated for Julia 1.12. There is a bounty to fix it. I’m probing whether or not I can do the…

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## [Hackathon Julia 2025 Projects - 07/26](https://discourse.julialang.org/t/hackathon-julia-2025-projects-07-26/131071)

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**Author:** [@Leticia-maria](https://discourse.julialang.org/u/Leticia-maria)\
**Replies:** 1\
**Last updated:** [July 26, 2025, 1:45am UTC](https://discourse.julialang.org/t/hackathon-julia-2025-projects-07-26/131071 "2025-07-26T01:45:46Z")

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We had our closing ceremony today, but JuliaCon is not over yet! Tomorrow there will be a Hackathon at CMU. Go to Cohon University Center around 9 AM, and let’s group together and code! Post here the projects you want t…

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## [Support for adjoint sensitivities with \`SciMLStructures\` in ODE problems](https://discourse.julialang.org/t/support-for-adjoint-sensitivities-with-scimlstructures-in-ode-problems/131049)

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**Author:** [@albangossard](https://discourse.julialang.org/u/albangossard)\
**Replies:** 2\
**Last updated:** [July 25, 2025, 6:15pm UTC](https://discourse.julialang.org/t/support-for-adjoint-sensitivities-with-scimlstructures-in-ode-problems/131049 "2025-07-25T18:15:02Z")

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Hi all, In complex geoscientific models, it’s common to have many simulation parameters that need to be passed into the ODE function. At the same time, we often want to compute gradients with respect to some of these pa…

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## [Help speeding up \`DiscreteProblem\`](https://discourse.julialang.org/t/help-speeding-up-discreteproblem/130986)

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**Author:** [@sdwfrost](https://discourse.julialang.org/u/sdwfrost)\
**Replies:** 5\
**Last updated:** [July 25, 2025, 2:48pm UTC](https://discourse.julialang.org/t/help-speeding-up-discreteproblem/130986 "2025-07-25T14:48:49Z")

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Hi Everyone, I’m finding that using DiscreteProblem on my toy example is about 4x slower than a vanilla loop with pre-allocated output. DiscreteProblem version Base Julia version My model is as follows: function sir…

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## [Weird (minor) bug in VSCode Unicode font](https://discourse.julialang.org/t/weird-minor-bug-in-vscode-unicode-font/131002)

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**Author:** [@BLI](https://discourse.julialang.org/u/BLI)\
**Replies:** 9\
**Last updated:** [July 25, 2025, 1:08pm UTC](https://discourse.julialang.org/t/weird-minor-bug-in-vscode-unicode-font/131002 "2025-07-25T13:08:53Z")

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\[Windows 11, updated today\] I want to use symbol \\phi in my code (\\phi in LaTeX). However, if I type \\phi and hit Tab in VSCode (both Jupyter Notebook and \*.jl file), the result on the screen is symbol \\varphi (\\varphi)…

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## [TTSX: Recompilation on every run](https://discourse.julialang.org/t/ttsx-recompilation-on-every-run/131003)

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**Author:** [@Philippe\_Maincon1](https://discourse.julialang.org/u/Philippe_Maincon1)\
**Replies:** 9\
**Last updated:** [July 25, 2025, 12:11pm UTC](https://discourse.julialang.org/t/ttsx-recompilation-on-every-run/131003 "2025-07-25T12:11:20Z")

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Colleagues and I are developing Muscade.jl. Muscade is deliberately putting a high workload on the Julia 1.11 compiler. I have done nothing with module precompilation so far. Thus I have a significant TTFX, but this i…

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## [Issues with new Discourse theme](https://discourse.julialang.org/t/issues-with-new-discourse-theme/131051)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 3\
**Last updated:** [July 25, 2025, 11:44am UTC](https://discourse.julialang.org/t/issues-with-new-discourse-theme/131051 "2025-07-25T11:44:02Z")

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It appears the Discourse theme was changed recently. The Dark variation is hiding the Julia logo: Anyone else experiencing the issue?

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## [Dealing with type stability when nothing can be returned](https://discourse.julialang.org/t/dealing-with-type-stability-when-nothing-can-be-returned/131040)

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**Author:** [@sea\_slug](https://discourse.julialang.org/u/sea_slug)\
**Replies:** 1\
**Last updated:** [July 25, 2025, 9:58am UTC](https://discourse.julialang.org/t/dealing-with-type-stability-when-nothing-can-be-returned/131040 "2025-07-25T09:58:53Z")

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I have a relatively complex Agent Based Model (ABM) that I am profiling. One function in particular (get\_shark\_pos) is dominating the runtime according to the flame graph. I am surprised because the function is very simp…

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## [\[ANN\] ReactiveGraphs.jl - Reactive programming with a computational graph](https://discourse.julialang.org/t/ann-reactivegraphs-jl-reactive-programming-with-a-computational-graph/99262)

<div class="topic-metadata">

**Author:** [@RomainPct](https://discourse.julialang.org/u/RomainPct)\
**Replies:** 10\
**Last updated:** [July 25, 2025, 8:28am UTC](https://discourse.julialang.org/t/ann-reactivegraphs-jl-reactive-programming-with-a-computational-graph/99262 "2025-07-25T08:28:05Z")

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Hi, I want to introduce v0.1 of ReactiveGraphs.jl. You can find the documentation here. The purpose of this package is to facilitate the development of (currently mono-threaded) data processing applications that consum…

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## [Receive the success status of \`push!(Set, element)\`](https://discourse.julialang.org/t/receive-the-success-status-of-push-set-element/130988)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 24\
**Last updated:** [July 25, 2025, 8:21am UTC](https://discourse.julialang.org/t/receive-the-success-status-of-push-set-element/130988 "2025-07-25T08:21:15Z")

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I can push! an element to a Set. julia\> S = Set(); julia\> e = 1; julia\> push!(S, e) Set{Any} with 1 element: 1 But I am not aware of a straightforward way to understand if the element e was new to S. Therefore I w…

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## [Particle Filtering methods](https://discourse.julialang.org/t/particle-filtering-methods/130828)

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**Author:** [@Tanya123](https://discourse.julialang.org/u/Tanya123)\
**Replies:** 9\
**Last updated:** [July 25, 2025, 6:07am UTC](https://discourse.julialang.org/t/particle-filtering-methods/130828 "2025-07-25T06:07:43Z")

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Hi everyone! I’m new to data assimilation and working with particle filters. I have a model where the β function is sinusoidal and linearly advects over time. It’s a 2D field on an 80×80 grid with double bumps. I’m tryi…

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