fox at ucw.cz
Fri Apr 20 15:25:12 CEST 2012
> I went to Aleksandar Prokopec's talk about Concurrent Tries at the Scala day earlier this week. I thought it was pretty cool. Here's the paper.
> Maybe we should have a Haskell version? Maybe we already do?
I think we do not have any nontrivial concurrent structures
(we have MVar and FIFO + Semaphore built on top of it).
Most of work seem to be done on persistent structures. On that front,
Johan's unordered-containers package implements the hash tries,
which are roughly the described CTries without concurrent updates.
I am not sure it would be worth implementing a structure in Haskell
that is inherently concurrent. For me it was always enough to wrap
a persistent structure in an MVar, so updates are performed sequentially
and accesses can be made in parallel.
Such a structure would probably have to be strict and in an ST monad,
to get a usable and deterministic behaviour.
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