Temp array in scidb-py


It looks like scidb-py creates non-temp array by default. Is there any option to let it create temporary array? I only see a function to convert an array to a temporary array (as_temp function on SciDBArray), but the array itself is still non-temp. Another question is, the arrays created by scidb-py are non-persistent by default, meaning that they are deleted when python exits. Then, why by default the arrays are non-temp in scidb? I understand that temp array does not guarantee ACID, but looks like in many scidb-py use cases, the arrays are not shared by multiple users. How much performance gain can we expect from temp arrays?