Array modifier eats up a lot of RAM ... and more duplicates methods tests

I’ve made this post on, and someone pointed me out that i should be linked here. So here i am.

To resume it, Array may treat the mesh as full copies instead of clones (linked duplicates), taking a bunch o RAM.
There’s also some comparisons with other methods of do duplicates, and i hope, some tips on better ways to do it.

see the use of hard disk an RAM of each file, like in this example:

to make it clear, here’s the link:

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