My understanding is that a slice is an array of pointers. So your []struct{} is
essentially an array of pointers to the structs. Your []*struct{} is an array
of pointers to pointers to the structs. In terms of memory allocation, both
should be similar. For every modification, a new array is created and the
pointers are copied.
If you don't need random access, linked list should be more efficient. However,
slice is cheap. Unless you are dealing with a large number of items, the
difference may not be substantial.
I am no expert, so I may be wrong about this.
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