On Jan 15, 2006, at 20:21, Philippe C.D. Robert wrote:
Do you have concrete numbers which indicate "massively higher (ptr)
memory overhead and load times" ?
Obviously not, that is why I wrote: _expect_ to be slower.
Why do I expect this? Because in Objective-C programs plenty of objects
are used and objects in ObjC are always accessed by pointers. Just take
using a simple NSString like @"hello", the isa pointer will be larger
than the payload. Every reference to the string will be larger than the
payload.
I would say the far majority of classes/objects in SOPE/OGo consist of
pointers (either to other objects or to base objects like NSString's).
So I would expect the memory consumption to increase significantly.
This should also hurt the CPU cache.
So this is why I wondered when Richard said that its 50% faster :-) I
would be pleased if it would be as fast as 32bit and just result in the
waste of memory ;-)
Also note that I know little to nothing about the CPU architectures in
place, which is why I asked whether someone knows a reason why 64bit
would be faster except for applications which actually require 64bit
numbers or pointers.
Greets,
Helge
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