On Oct 22, 2012, at 12:16 PM, Jacob Carlborg <d...@me.com> wrote: > On 2012-10-22 19:44, Sean Kelly wrote: > >> Blocks flagged as shared would be completely ignored by the thread-local GC >> collection. Since shared data may never reference unshared data, that >> should avoid anything being collected that's still referenced. I hadn't >> thought about "immutable" though, which may turn out to be a problem. > > Funny thing, immutable was supposed to make it easier to do concurrency > programming.
In the realm of shared data concurrency, immutable is definitely useful. But where data is all thread-local I'm not entirely sure. Either way though, immutable within the context of this discussion is a library optimization issue rather than anything to do with the type itself.
