Array of pointers to struct vs. Array of struct

General Usage
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1

I want to create a vector of structs. In my code I do something like this

some_vector = Vector{SomeStruct}(big_number)
for i in 1:big_number
    some_vector[i] = SomeStruct(some_args)
end

I believe this is allocating a small amount of memory many times. Once for each struct, and once for the vector. The vector just contains pointers to the structs.

Can I allocate an array of structs which is just one huge block of memory? If so, would that actually be more efficient?

2

Are your structs mutable? If possible make them immutable so they can be stored inline, depending on your access pattern GitHub - JuliaArrays/StructArrays.jl: Efficient implementation of struct arrays in Julia can be more efficient than the inline structs

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3

Does your code compiles? I think it should be:

some_vector = Vector{SomeStruct}(undef, big_number)

in the first line. There is no constructor for Vector that only takes a number.

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