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I've been working in the data space with R since 2014 and Python/Pyspark since 2017 and I'd love to switch to Julia, but whenever I look up for "production" examples I don't feel safe enough to start a real, paid project on it.

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I have similar feelings as you. In my work people are being pushed to use Julia. However, I feel that most Julia use cases are simple scripts. Most Julia users don't use a debugger or develop tests.

A Julia debugger was introduced recently [1] but its in a very early stage.

[1] https://julialang.org/blog/2019/03/debuggers

To be fair, there were debuggers pre-1.0, but the changes in the language syntax and compiler broke them. That one was just the first one to work with the new architecture that was released on the second half of last year (and since the language is now stable, we can expect it to stay functional and improve over time). There is also another debugger being made with a completely different strategy (embedding the debugger within the compiled code instead of interpreting it):

https://github.com/oxinabox/MagneticReadHead.jl

May I ask where you work?

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