Mac Apps That Use Garbage Collection Must Move to ARC

[Walter Bright via Digitalmars-d]

On 2/25/2015 6:57 PM, deadalnix wrote:
> You seems to avoid the important part of my message : write barrier tend to be
> very cheap on immutable data. Because, as a matter of fact, you don't write
> immutable data (in fact you do to some extent, but the amount of write is minimal.
>
> There is no reason not to leverage this for D, and java comparison are
> irrelevant on the subject as java does not have the concept of immutability.
>
> The same way, we can use the fact that TL data are not supposed to refers to
> each others.

Of course, you don't pay a write barrier cost when you don't write to data, 
whether it is immutable or not is irrelevant.