Julia has a strong point in being JIT-compiled language that incremental compilation works (it has to). Still, to take full advantage of that, saving state is required. Imagine you have a codebase which takes 20 minutes to compile, then the part you want to fix. Ideally, you would run the code for …

What does “the part you want to fix” consist of? Can it not just be redefined in the running session? Maybe Revise.jl can make the workflow more convenient? Or if the “codebase that takes 20 minutes to compile” is only about precompilation, maybe put that code in a package and put some good precomp…

It also depends what you mean by saving the REPL state: If you mean precompiled code, the easiest way is to use GitHub - JuliaLang/PrecompileTools.jl: Reduce time-to-first-execution of Julia code in your package. If you mean actual REPL results, you might want to enable the numbered prompt introdu…

Old thread of mine on this topic.

Thanks for the link. Interesting read! Since that conversation happened, 1.9 introduced changing the active module in the REPL. I wonder if this mitigates @anon56330260 ’s point that you can’t serialize Main because it is in constant flux. A user could start by dropping into Main.Workspace, import …

[image] albheim: With that said, a way to save the state could probably be convenient in many cases. Though I have no clue how hard it would be to implement, and I’m pretty sure it doesn’t currently exist. See also Checkpointing with Julia

That thread was carried under the context of serialization. My point concerned about whether it’s possible to serialize Main in a stable, automatic and safe way, with a focus on compilation latency. Notice that these two concepts (compilation latency and serialization) are largely orthogonal. You ca…

[image] mrufsvold: This is a feature that R supports. You can save all the variables defined in the current session so you can come back tomorrow without rerunning your script. It should be awesome if, when I open a Pluto notebook, it was just ready for me to code instead of running the whole th…

Technically R and Matlab can’t save arbitrary values. The same limitations apply to all languages. [image] mkitti: While you might be able to recursively serialize the data structures in the current workspace, serializing JIT compiled functions does not make sense. You can actually do this b…

What about linux “hibernation” tools like criu that dumps memory to disk to restore entire processes?

Save/load REPL state

General Usage

stevengj August 3, 2023, 12:11pm 6

Topic		Replies	Views
REPL Save/restore General Usage repl , replicability	5	229	July 17, 2025
What is harder about saving a Julia session via the REPL whenever? Internals & Design sysimage	10	1599	July 26, 2022
Save complete session snapshot? Tooling	11	3223	May 27, 2019
Reuse Compiled Code Between REPLs? New to Julia repl , precompilation	10	382	July 19, 2024
Workflow question - how to guarantee no dependence on global state without long load times? New to Julia	19	1194	May 27, 2019

Save/load REPL state

Related topics