Units units everywhere

Picking up a map I started awhile ago and I'm running into the problem that there are already a whole lotta units around a pretty big map and there's only going to be more. A lot of these units are stationary but they take up memory nonetheless. I was wondering if there's a good way to reduce lag without making regions/points for every single unit and having them spawn/remove whenever they needed/didnt need to be around. I considered having everything die at start with corpses that would never decay and then create/kill the matching units using the corpses as markers for location and identifiers of which unit, but I wasn't sure if that would help anything.

We're talking a lot of units though. Well over 1000 stationary. Probably will end up being around 2500.

You can make large regions encompassing areas of the map. like if its a maze you can make a region or 2 to cover a whole level for each level

Then when the map starts pick every unit in the region 1 by 1, save the units position to a point array, and save the unit type to a unit type array
Make sure those arrays are synced together so that point[1] is the position of unit[1]
Then remove them
This might cause alot of lag at the start of the map, so you may need to have something that says setting up map, or something like that for the first few seconds

Then when they get to that level, or that section of the map use the array to spawn the units using the unit type array in the position that is saved in the point array to reconstruct the units for that level

sweet thats exactly what i was looking for - thanks

I think there is a function to hide parts of the environment to help prevent that lag. So when your not in that region you hide the area and would only cause the lag if you had a bunch of areas showing. Cause slithery if you destroy the units or not, they still take up some memory when they are dead.

Hidden units still take up memory
The only way to clear them from memory is to remove them