memory usage query

[JuanPi]

Hi,
What is the best way to know how much memory is being used by octave variables?
whos doesn't do the trick since

A = rand(1e3);
whos

Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  =====
        A        1000x1000                 8000000  double

Total is 1000000 elements using 8000000 bytes

B = A;
whos
Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  =====
        A        1000x1000                 8000000  double
        B        1000x1000                 8000000  double

Total is 2000000 elements using 16000000 bytes

So it says we are using the double amount of memory, but afaiu B = A
did not create a copy of A, so the reported memory assumes COW was
executed.

-- 
JuanPi Carbajal
Public GnuPG key: 9C5B72BF
-----
The end of funding: "Many researchers were caught up in a web of
increasing exaggeration."
- Hans Moravec