[Haskell-cafe] Re: Why functional programming matters
haskell at list.mightyreason.com
Thu Jan 24 17:14:39 EST 2008
Achim Schneider wrote:
> Don Stewart <dons at galois.com> wrote:
>>> In addition to STM, another item that should interest serious
>>> programmers is forkIO. Lightweight threads that (unlike in Python)
>>> can use multiple cpu's. Coming from Python, I personally appreciate
>>> this. Using STM to handle concurrency issues often greatly
>>> simplifies multithreaded code.
>> And further on this, the use of `par` in pure code to make it go
>> multicore is way beyond what most people think is possible.
> I said _don't_ make me think of using par on a beowolf cluster of
> ps3's. Don't you guys have any scruples?
Well... ghc still has a single-threaded garbage collector, so all the "par"
threads must stop for garbage collection. So scaling to the level of a cluster
would be significantly sub-linear.
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