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From: Yigong Liu (yigongliu_at_[hidden])
Date: 2006-03-01 01:15:42

Hi Larry,

Thanks for the suggestions. I'll definitely look into it.


On 2/28/06, Larry Evans <cppljevans_at_[hidden]> wrote:
> On 02/28/2006 01:09 AM, Yigong Liu wrote:
> >
> > Yes, most design considerations of message passing systems still apply,
> such
> > as avoiding data copying (Channel did it by message reference counting).
> > More suggestions and comments are highly appreciated.
> >
> Hi, Yigong.
> I know almost nothing about distributed systems, but the above mention
> of reference counting reminded me that "weighted reference counting"
> is supposed to have some speed advantage in distributed systems.
> A reference is [lins91c] as shown on:
> IIRC, it saves time at the cost of memory. The extra memory is caused
> by the "weight" of of the reference count being stored in the smart
> pointer instead of a reference count in the object pointed-to. The
> weight is, I think, log2 of the normal reference count. Each
> time a copy is made, the weight is evenly divided between the from and
> to smart pointers. Only when an object is destroyed is communication
> with the pointee needed. Of course, there must be some provision for
> the weight dropping below 1 when too many copies are made.
> Would that be any use in your library?
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