ActiveRecord objects are too fat

[msugakov]

Hello
I've been trying to implement batch processing operations using SubSonic 3.0.0.4 and ActiveRecord pattern. Loading of 100k objects from database quickly ate 2Gb of RAM. Then I ran a test example:

create table ActiveRecordTest ( Field int )

then

class Program
{
    static void Main(string[] args)
    {
        int N = 10000;
        long before = Process.GetCurrentProcess().WorkingSet64;
        ActiveRecordTest[] array = new ActiveRecordTest[N];
        for (int i = 0; i < N; ++i)
            array[i] = new ActiveRecordTest();
        long after = Process.GetCurrentProcess().WorkingSet64;
        Console.WriteLine("Usage: {0} bytes. Per object (inaccurate): {1} bytes/object", after-before, (after-before)/N);
        return;
    }
}

Results of running this on my system say that there's too big overhead:

Usage: 216301568 bytes. Per object (inaccurate): 21630 bytes/object

I hope that fixing this will improve SubSonic scalability.