Hey, I cannot come up with a minimal example yet, but I encountered that my function return was type unstable because of such a construct: function foo(x) # some code y = (1, 2) # first y = [x[1] for i in x] # second # more code return g(y) end The first y has a diff…

Yes, that boxing is done by the frontend and is exactly performance of captured variables in closures · Issue #15276 · JuliaLang/julia · GitHub . Note that the type stability of y is irrelevant here, for example: function f(x) y = "a" y = "b" g(_) = y return g(x) end will also caus…

Type unstable function because same variable name used twice

General Usage

kristoffer.carlsson April 8, 2021, 5:38pm 7

Well, it would be interesting to see an actual example. Maybe you hit performance of captured variables in closures · Issue #15276 · JuliaLang/julia · GitHub.

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Type unstable function because same variable name used twice

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