vehicles inAreaArray myTrigger; allUnits inAreaArray "myMarker";
these are quite expensive if you have 30+ vehicles or 200+ units
https://community.bistudio.com/wiki/nearEntities is the most efficient (AFAIK)
possible to extend it with [typesExclude, includeCrews, excludeDead] optional parameters from https://community.bistudio.com/wiki/entities to make it even more efficient?
also helpful would be such filters for vehicles and allUnits
As suggested by Killzone Kid to the request above