Hello, I’m a very basic Julia user working on a model simulating a food web and fishing. The model works but I need to decrease the run time. I’ve read several tutorials about @code_warntype and I understand I should define types where possible, to not change them within a function, and to not mix …

Just to be sure: did you check with a profiler first?

I ran @profile but I don’t understand how to read it either. What specifically am I looking for? It is quite long, but I know it shows how many allocations are needed for certain parts. Here is the first part ========================================================= ╎44245 @Base\client.jl:495…

[image] HelgavonLichtenstein: What does @_11 or @_12 mean? Why are not all parameters given a number? They are given a number when you have multiple variables with the same name. For example: julia> f(x, y) = (x = 2; x+y) f (generic function with 2 methods) julia> @code_warntype f(3, 2) Met…

This looks neat! A lot of these bars seem big. Should I try looking at the red parts (allocating)? [image]

[image] kristoffer.carlsson: rebind a variable inside another function For some things, I preallocate the size and pass this as an argument to create the object, for example v For others, I define it within the function. Which one is correct? const num_nutrient = 2 function create_vectors(…

[image] HelgavonLichtenstein: Should I try looking at the red parts (allocating)? I don’t see any significant allocation or dynamic dispatch in the image you posted. You can click one of the bigger bars and should then see were the time is spent in your source code or in one of the included p…

[image] HelgavonLichtenstein: For some things, I preallocate the size and pass this as an argument to create the object, for example v For others, I define it within the function. Which one is correct? None of those should be related. I think it is easiest if you can show a representative pi…

I agree it would be easiest to show the bad code, but I don’t know how to identify it using @code_warntype. Using Juno.profiler() as suggested by @goerch has let me find the functions and lines of code that take a lot of time. I will assume these lines are causing the bad code messages in @code_war…

[image] HelgavonLichtenstein: This is my attempt at a MWE, except I can’t get it to work. bioS isn’t being passed to one_more_function and I don’t understand why. It is probably a scoping issue I can’t see right now. There are multiple issues with the code: You need to assign the return valu…

What does @_## mean in @code_warntype (and other questions)?

General Usage

goerch May 2, 2022, 10:38am 4

Here is how I do it.

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What does @_## mean in @code_warntype (and other questions)?

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