Hi Frédéric
Nice to see you on the Pharo mailing list!
Just the other day I needed this too and I implemented the following
method:
Object>>sizeInMemory
"Returns the number of bytes used by this object in memory (including
its header)"
| headerSize instanceSize |
headerSize := (self class indexIfCompact > 0 ifTrue: [ 4 ] ifFalse:
[ 8 ]).
instanceSize := (self class isVariable
ifFalse: [ self class instSize * Smalltalk wordSize ]
ifTrue: [ (self basicSize * (self class isBytes
ifTrue: [ 1 ] ifFalse: [ Smalltalk wordSize ])) ]).
^ headerSize + instanceSize
BTW, I think that would be a meaningful addition. Could somebody
quickly check the method to verify that I didn't do any miscalculation?
Cheers,
Adrian
On Oct 21, 2008, at 17:58 , Frederic Pluquet wrote:
Hello,
For an experimentation, I need to know the size in bytes of any
object. Is there a way to obtain this information in Pharo ?
Fréd
--
Frédéric Pluquet
Université Libre de Bruxelles (ULB)
Assistant
http://www.ulb.ac.be/di/fpluquet
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