The documentation praises immutable structs: Composite objects declared with struct are immutable; they cannot be modified after construction. This may seem odd at first, but it has several advantages: It can be more efficient. Some structs can be packed efficiently into arrays, and in some case…

There was some discussion on the PR which implemented the new functionality after the same thing was brought up .

Why `const` fields in a `mutable struct` instead of `mutable` field in ordinary `struct`?

Zach_Christensen September 2, 2023, 1:51am 8

I’m pretty sure this is the main reason but I’m not sure if it’s documented anywhere. It seems like a good performance tip or maybe just part of the const docstring

Julep: Efficient Hierarchical Mutable Data

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Why `const` fields in a `mutable struct` instead of `mutable` field in ordinary `struct`?

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