# Latest

**URL:** https://discourse.julialang.org/latest.md?page=34

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

**Page:** 35

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## [Should Julia have an unofficial community mascot? If so, which one?](https://discourse.julialang.org/t/should-julia-have-an-unofficial-community-mascot-if-so-which-one/136826)

<div class="topic-metadata">

**Author:** [@gwr](https://discourse.julialang.org/u/gwr)\
**Replies:** 44\
**Last updated:** [April 30, 2026, 7:21am UTC](https://discourse.julialang.org/t/should-julia-have-an-unofficial-community-mascot-if-so-which-one/136826 "2026-04-30T07:21:06Z")

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This is a poll about whether Julia should have an unofficial community mascot. Since this topic has resurfaced repeatedly over the years without converging, I thought it might be useful to at least get a clearer signal …

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## [Julia v1.13.0-rc1 is now available](https://discourse.julialang.org/t/julia-v1-13-0-rc1-is-now-available/136929)

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**Author:** [@ararslan](https://discourse.julialang.org/u/ararslan)\
**Replies:** 0\
**Last updated:** [April 30, 2026, 4:43am UTC](https://discourse.julialang.org/t/julia-v1-13-0-rc1-is-now-available/136929 "2026-04-30T04:43:04Z")

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Julia version 1.13.0-rc1, the first release candidate for v1.13.0, is now available. Check out the NEWS.md file to see what will be new in 1.13. Binaries are available via JuliaUp and for manual download in the upcoming …

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## [JuliaFormatter.jl needs help](https://discourse.julialang.org/t/juliaformatter-jl-needs-help/136744)

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**Author:** [@Ronis\_BR](https://discourse.julialang.org/u/Ronis_BR)\
**Replies:** 2\
**Last updated:** [April 30, 2026, 12:49am UTC](https://discourse.julialang.org/t/juliaformatter-jl-needs-help/136744 "2026-04-30T00:49:11Z")

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Hi! I am not sure if this was posted here, but it seems that the maintainer of JuliaFormatter.jl needs help. I could try helping, but unfortunately, I’m too involved in other projects, such as PrettyTables.jl and Sat…

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## [Symbolics.jl sum](https://discourse.julialang.org/t/symbolics-jl-sum/136924)

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**Author:** [@jcbritobr](https://discourse.julialang.org/u/jcbritobr)\
**Replies:** 1\
**Last updated:** [April 29, 2026, 11:08pm UTC](https://discourse.julialang.org/t/symbolics-jl-sum/136924 "2026-04-29T23:08:18Z")

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Hello. Good evening. There is a sum function for Symbolics.jl? Like a sympy sum(x^2, x, 1, n)?

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## [Meshes and units (Meshes.jl)](https://discourse.julialang.org/t/meshes-and-units-meshes-jl/122235)

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**Author:** [@prittjam](https://discourse.julialang.org/u/prittjam)\
**Replies:** 10\
**Last updated:** [April 29, 2026, 9:46pm UTC](https://discourse.julialang.org/t/meshes-and-units-meshes-jl/122235 "2026-04-29T21:46:21Z")

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I am defining geometries in meshes, but to perform computations, I must strip units and vectorize the data using ustrip.(to.(data)) to create unitless vectors. This process feels cumbersome, possibly indicating uninten…

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## [\[ANN\] LAlatex.jl v1.0.0 — LaTeX rendering for linear algebra and symbolic math](https://discourse.julialang.org/t/ann-lalatex-jl-v1-0-0-latex-rendering-for-linear-algebra-and-symbolic-math/136908)

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**Author:** [@ea42gh](https://discourse.julialang.org/u/ea42gh)\
**Replies:** 3\
**Last updated:** [April 29, 2026, 8:32pm UTC](https://discourse.julialang.org/t/ann-lalatex-jl-v1-0-0-latex-rendering-for-linear-algebra-and-symbolic-math/136908 "2026-04-29T20:32:19Z")

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LAlatex.jl is a Julia package for rendering linear algebra objects and symbolic expressions as clean LaTeX for notebooks, handouts, and docs. GitHub: GitHub - ea42gh/LAlatex.jl: convert julia objects to latex representa…

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## [How to update Makie.jl plot based on ComputeGraph?](https://discourse.julialang.org/t/how-to-update-makie-jl-plot-based-on-computegraph/136730)

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**Author:** [@juliohm](https://discourse.julialang.org/u/juliohm)\
**Replies:** 12\
**Last updated:** [April 29, 2026, 8:29pm UTC](https://discourse.julialang.org/t/how-to-update-makie-jl-plot-based-on-computegraph/136730 "2026-04-29T20:29:18Z")

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I am using the ComputeGraph feature of Makie.jl for the first time. After adding widgets (observables) as nodes in the graph, I also added nodes for the plot objects: # initialize scene with elements # that do not depen…

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## [Reviewing GitHub Actions workflows & tokens](https://discourse.julialang.org/t/reviewing-github-actions-workflows-tokens/136400)

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**Author:** [@mbauman](https://discourse.julialang.org/u/mbauman)\
**Replies:** 4\
**Last updated:** [April 29, 2026, 7:16pm UTC](https://discourse.julialang.org/t/reviewing-github-actions-workflows-tokens/136400 "2026-04-29T19:16:14Z")

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GitHub Actions are great! But following some recent news, I wanted to make sure I understood their potential issues… and more importantly, get a better understanding of what I need to be looking for and avoiding. I foun…

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## [Base.Semaphore and @spawn: The Illusion of Control vs. Explicit Resource Management](https://discourse.julialang.org/t/base-semaphore-and-spawn-the-illusion-of-control-vs-explicit-resource-management/136916)

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**Author:** [@Alexander\_B](https://discourse.julialang.org/u/Alexander_B)\
**Replies:** 2\
**Last updated:** [April 29, 2026, 3:46pm UTC](https://discourse.julialang.org/t/base-semaphore-and-spawn-the-illusion-of-control-vs-explicit-resource-management/136916 "2026-04-29T15:46:52Z")

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All the best to everyone The Problem When using Base.Semaphore to limit the number of concurrently executing heavy tasks, there is a fundamental difference in the behavior of the two approaches: Option A (Syntactic su…

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## [Limitations of generated functions versus macros or functions](https://discourse.julialang.org/t/limitations-of-generated-functions-versus-macros-or-functions/136910)

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**Author:** [@Benny](https://discourse.julialang.org/u/Benny)\
**Replies:** 11\
**Last updated:** [April 29, 2026, 3:46pm UTC](https://discourse.julialang.org/t/limitations-of-generated-functions-versus-macros-or-functions/136910 "2026-04-29T15:46:31Z")

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Tentatively writing a generated function and relearning things, and ran into a couple questions: The most warned limitation of generated functions is most side effects in the method body (throwing errors is a notable e…

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## [MTK programmatic populating initial guess values](https://discourse.julialang.org/t/mtk-programmatic-populating-initial-guess-values/136912)

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**Author:** [@mark.garnett](https://discourse.julialang.org/u/mark.garnett)\
**Replies:** 4\
**Last updated:** [April 29, 2026, 3:36pm UTC](https://discourse.julialang.org/t/mtk-programmatic-populating-initial-guess-values/136912 "2026-04-29T15:36:34Z")

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Hi all, this should be really easy but I can’t quite figure it out. When you create an MTK system, and want to solve it as a NonlinearProblem, ODEProblem, or whatever, you often need provide an initial guess or initial …

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## [Makie: how to add some gap to the right end of a figure?](https://discourse.julialang.org/t/makie-how-to-add-some-gap-to-the-right-end-of-a-figure/136907)

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**Author:** [@Datseris](https://discourse.julialang.org/u/Datseris)\
**Replies:** 5\
**Last updated:** [April 29, 2026, 9:08am UTC](https://discourse.julialang.org/t/makie-how-to-add-some-gap-to-the-right-end-of-a-figure/136907 "2026-04-29T09:08:39Z")

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I have a figure that is composed of two columns. Each column is itself a GridLayout. I am having the problem that on the right end of the figure, the axes labels go over the figure boundary: How do I fix this? I don’t…

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## [Stan.jl v10.8.4 Released](https://discourse.julialang.org/t/stan-jl-v10-8-4-released/136904)

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**Author:** [@bparbhu](https://discourse.julialang.org/u/bparbhu)\
**Replies:** 3\
**Last updated:** [April 28, 2026, 11:58pm UTC](https://discourse.julialang.org/t/stan-jl-v10-8-4-released/136904 "2026-04-28T23:58:17Z")

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Stan.jl v10.8.4 Released — CmdStan 2.37 Support and Ecosystem Refresh We’re happy to announce the release of Stan.jl v10.8.4. This release brings the Stan.jl ecosystem to CmdStan 2.37, giving the Julia community access …

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## [New problem for Pkg.update() with proxy/antivirus](https://discourse.julialang.org/t/new-problem-for-pkg-update-with-proxy-antivirus/136851)

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**Author:** [@LaurentPlagne](https://discourse.julialang.org/u/LaurentPlagne)\
**Replies:** 5\
**Last updated:** [April 28, 2026, 8:34am UTC](https://discourse.julialang.org/t/new-problem-for-pkg-update-with-proxy-antivirus/136851 "2026-04-28T08:34:41Z")

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Hi, I use Julia behind a firewall and since a few days I cannot do Pkg.update() anymore (even with a clean environment with no dependencies) . The command stalls at 49.9 % and finally times out. I wonder if this is…

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## [CUDA.jl with @threads causing memory leak?](https://discourse.julialang.org/t/cuda-jl-with-threads-causing-memory-leak/136853)

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**Author:** [@noetheriankoala](https://discourse.julialang.org/u/noetheriankoala)\
**Replies:** 3\
**Last updated:** [April 27, 2026, 10:23pm UTC](https://discourse.julialang.org/t/cuda-jl-with-threads-causing-memory-leak/136853 "2026-04-27T22:23:37Z")

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Hello. First of all, I am using Julia v1.12.6, CUDA v5.11.2, and FLoops v0.2.2. Consider the following code and comments. using CUDA using Base.Threads function func1() A = CuArray{Float64}(undef, 1500, 1500, 1000)…

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## [Creating and Solving Block Sparse Matrices with PETSc](https://discourse.julialang.org/t/creating-and-solving-block-sparse-matrices-with-petsc/90831)

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**Author:** [@Azurezaber](https://discourse.julialang.org/u/Azurezaber)\
**Replies:** 15\
**Last updated:** [April 27, 2026, 1:12pm UTC](https://discourse.julialang.org/t/creating-and-solving-block-sparse-matrices-with-petsc/90831 "2026-04-27T13:12:55Z")

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Hello! I am using Julia to write a finite volume CFD code, which requires solving large (40,000x40,000) block sparse matrices. Currently, I am using the PETSc interface provided by PETSc.jl, as its GMRES routine is notab…

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## [JuMP: unused \`@operator\` has critical impact](https://discourse.julialang.org/t/jump-unused-operator-has-critical-impact/136895)

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**Author:** [@cstjean](https://discourse.julialang.org/u/cstjean)\
**Replies:** 2\
**Last updated:** [April 27, 2026, 5:45am UTC](https://discourse.julialang.org/t/jump-unused-operator-has-critical-impact/136895 "2026-04-27T05:45:25Z")

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I have some model defined like fake\_fun(a,b) = 0 function my\_model() ... @operator(m, unused\_op, 2, fake\_fun) ... end where both unused\_op and fake\_fun are not used anywhere except on that line. With thi…

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## [Modify axis options when using Plots.jl with pgfplotsx backend](https://discourse.julialang.org/t/modify-axis-options-when-using-plots-jl-with-pgfplotsx-backend/121292)

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**Author:** [@lcm](https://discourse.julialang.org/u/lcm)\
**Replies:** 3\
**Last updated:** [April 26, 2026, 4:31pm UTC](https://discourse.julialang.org/t/modify-axis-options-when-using-plots-jl-with-pgfplotsx-backend/121292 "2026-04-26T16:31:33Z")

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I am using Plots.jl with the pgfplotsx() backend for emitting .tikz files. Together with the tikzscale LaTeX package this makes for nice plots for a TeX document. However, in the emitted plots there are a lot of options…

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## [AD over runtime-selected fields in nested structs — design patterns?](https://discourse.julialang.org/t/ad-over-runtime-selected-fields-in-nested-structs-design-patterns/136882)

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**Author:** [@stevenhughes](https://discourse.julialang.org/u/stevenhughes)\
**Replies:** 4\
**Last updated:** [April 26, 2026, 12:10pm UTC](https://discourse.julialang.org/t/ad-over-runtime-selected-fields-in-nested-structs-design-patterns/136882 "2026-04-26T12:10:49Z")

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We have a framework where users define models as nested structs and declare at runtime which fields are optimization variables. The framework then needs to differentiate constraints/objectives with respect to those selec…

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## [Pathological compile times training a Lux+CUDA descriptor CNN with a similarity-matrix (SupCon) loss — Reactant, Zygote, and manual loops all hang on first step](https://discourse.julialang.org/t/pathological-compile-times-training-a-lux-cuda-descriptor-cnn-with-a-similarity-matrix-supcon-loss-reactant-zygote-and-manual-loops-all-hang-on-first-step/136884)

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**Author:** [@prittjam](https://discourse.julialang.org/u/prittjam)\
**Replies:** 2\
**Last updated:** [April 26, 2026, 11:49am UTC](https://discourse.julialang.org/t/pathological-compile-times-training-a-lux-cuda-descriptor-cnn-with-a-similarity-matrix-supcon-loss-reactant-zygote-and-manual-loops-all-hang-on-first-step/136884 "2026-04-26T11:49:43Z")

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\--- Body: I’ve been trying to train a small descriptor CNN (~1M params, 64×64 grayscale patch input → 128-dim L2-normalized embedding) with a Supervised Contrastive (SupCon) loss in pure Julia / Lux on a single B200…

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## [Error 10005: Cannot retrieve UnbdRay from Gurobi](https://discourse.julialang.org/t/error-10005-cannot-retrieve-unbdray-from-gurobi/136886)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 4\
**Last updated:** [April 26, 2026, 11:39am UTC](https://discourse.julialang.org/t/error-10005-cannot-retrieve-unbdray-from-gurobi/136886 "2026-04-26T11:39:08Z")

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Is this a bug? julia\> Gurobi.GRBsetdblattrarray(lps.o, "Obj", 1, xllen, mst.Xlb) 0 julia\> function opt\_and\_ter(m) # my definition of optimize! and return Gurobi's termination code o, r = m.o, m.refi …

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## [Puzzling construction with executable statements in struct definition](https://discourse.julialang.org/t/puzzling-construction-with-executable-statements-in-struct-definition/136887)

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**Author:** [@sgaure](https://discourse.julialang.org/u/sgaure)\
**Replies:** 2\
**Last updated:** [April 26, 2026, 9:22am UTC](https://discourse.julialang.org/t/puzzling-construction-with-executable-statements-in-struct-definition/136887 "2026-04-26T09:22:11Z")

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I thought I had seen most things in julia, but I’ve come across the following construction which I don’t think I’ve seen in the docs: using MacroTools const gotit = Set() macro genconstructor(spec) if !@capture(spe…

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## [Wavelets, sample rate, and replicating Matlab's default call](https://discourse.julialang.org/t/wavelets-sample-rate-and-replicating-matlabs-default-call/136875)

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**Author:** [@mahmah](https://discourse.julialang.org/u/mahmah)\
**Replies:** 9\
**Last updated:** [April 25, 2026, 8:02pm UTC](https://discourse.julialang.org/t/wavelets-sample-rate-and-replicating-matlabs-default-call/136875 "2026-04-25T20:02:15Z")

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Hi, I’m trying to get the same output as with a default cwt(x,fs) Matlab function call, where x is a signal and fs its sample rate. Could anyone help me? Here’s what I have done so far, but I don’t know how to include s…

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## [Writing parameter dependent methods for abstract type](https://discourse.julialang.org/t/writing-parameter-dependent-methods-for-abstract-type/136830)

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**Author:** [@Tbl](https://discourse.julialang.org/u/Tbl)\
**Replies:** 2\
**Last updated:** [April 25, 2026, 6:31pm UTC](https://discourse.julialang.org/t/writing-parameter-dependent-methods-for-abstract-type/136830 "2026-04-25T18:31:51Z")

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I want to write method for all subtypes of an abstract type which would make use of type parameter. Can you do that? Example, let us say we have concrete type MyType{T} and some method which needs T, like struct MyType{…

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## [Ignore masked tokens (Flux.jl)](https://discourse.julialang.org/t/ignore-masked-tokens-flux-jl/75591)

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**Author:** [@spragud2](https://discourse.julialang.org/u/spragud2)\
**Replies:** 6\
**Last updated:** [April 24, 2026, 7:56pm UTC](https://discourse.julialang.org/t/ignore-masked-tokens-flux-jl/75591 "2026-04-24T19:56:14Z")

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Hi, I’m working on implementing a seq2seq model in Flux. Is there a standard method, or if not a suitable approach, for ignoring masked tokens when computing the gradient? E.g. sentences of differing lengths, following …

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## [Examples of Julia-based End-User Tools](https://discourse.julialang.org/t/examples-of-julia-based-end-user-tools/136677)

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**Author:** [@MDSW](https://discourse.julialang.org/u/MDSW)\
**Replies:** 13\
**Last updated:** [April 24, 2026, 5:58pm UTC](https://discourse.julialang.org/t/examples-of-julia-based-end-user-tools/136677 "2026-04-24T17:58:27Z")

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All, I’m looking for examples of tools with an end-user facing interface of some sort for using them, with accessible code repositories. My interest is in surveying how these are structured, built and distributed. A few …

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## [\[ANN\] Mongoose.jl v0.3.x - AOT compilable HTTP Server](https://discourse.julialang.org/t/ann-mongoose-jl-v0-3-x-aot-compilable-http-server/136852)

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**Author:** [@AbrJA](https://discourse.julialang.org/u/AbrJA)\
**Replies:** 0\
**Last updated:** [April 24, 2026, 5:23pm UTC](https://discourse.julialang.org/t/ann-mongoose-jl-v0-3-x-aot-compilable-http-server/136852 "2026-04-24T17:23:10Z")

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Hi there, I’m happy to announce the 0.3 series of releases of the Mongoose.jl library. It brings a lot of improvements and new cool features. For example: Websocket support Middleware support Static file serving AOT …

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## [My journey training an LLM from scratch in Julia (and why I see huge potential)](https://discourse.julialang.org/t/my-journey-training-an-llm-from-scratch-in-julia-and-why-i-see-huge-potential/136843)

<div class="topic-metadata">

**Author:** [@mouad-tarif](https://discourse.julialang.org/u/mouad-tarif)\
**Replies:** 5\
**Last updated:** [April 24, 2026, 5:07pm UTC](https://discourse.julialang.org/t/my-journey-training-an-llm-from-scratch-in-julia-and-why-i-see-huge-potential/136843 "2026-04-24T17:07:59Z")

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I started training a language model from scratch in Julia. Not using pre-built libraries for the core - building my own BPE tokenizer, my own training loop, facing hallucinations, and rebuilding. I tried Flux and Lux. B…

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## [Makie: WGLMakie after reverse proxy (nginx)](https://discourse.julialang.org/t/makie-wglmakie-after-reverse-proxy-nginx/136847)

<div class="topic-metadata">

**Author:** [@dmolina](https://discourse.julialang.org/u/dmolina)\
**Replies:** 6\
**Last updated:** [April 24, 2026, 9:45am UTC](https://discourse.julialang.org/t/makie-wglmakie-after-reverse-proxy-nginx/136847 "2026-04-24T09:45:06Z")

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Dear all, I have a notebook in Pluto/PlutoSliderServer with several interactive graphics in a server for my students. My previous version was using Plots, but it was awfully slow, so I decided to try the WGLMakie and Ob…

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## [Unpredictable Compilation Performance of MTK-Generated Functions](https://discourse.julialang.org/t/unpredictable-compilation-performance-of-mtk-generated-functions/136827)

<div class="topic-metadata">

**Author:** [@chen\_hardworking](https://discourse.julialang.org/u/chen_hardworking)\
**Replies:** 19\
**Last updated:** [April 24, 2026, 5:14am UTC](https://discourse.julialang.org/t/unpredictable-compilation-performance-of-mtk-generated-functions/136827 "2026-04-24T05:14:18Z")

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Problem Statement: I am reporting a critical bottleneck regarding the compilation and loading stability of functions generated by ModelingToolkit.jl. My experience shows that the complexity of the generated symbolic Jaco…

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