Geometry Node Array

In Blender, when use the modifier array it's takes a lot of memory. Indeed, the modifier duplicates your object without instance. When you duplicate you can use Alt + D for create instance reduce your memory usage and your render time. The modifier array is like the Shift+D duplication so that consuming a lot memory and increase your render time. Evidently duplicate manually is tool long to be used. So you can download for free these nodegroups for have array who use and get nice render time. One node group can be used for circular array and one other for classic array. With these group you can also randomize the transform of the instance

To use it, simply append the two nodegroups from the file you download and a the geometry modifier the groupe use for the Array Group. For this time, add more than one array on object doesn't work. I am working on an addon for solve it.