[Haskell-cafe] GHC threaded runtimes and pure functions

[Bulat Ziganshin]

Hello Andrew,

Wednesday, September 16, 2009, 11:31:22 PM, you wrote:

>> That makes sense.  So maybe I should split my mapping into two
>> parallel ones or however many CPUs there are using par.
>>

> If you're going to use par, it doesn't really matter how many sparks you
> create. You just need to avoid creating millions of really tiny sparks.
> You could create, say, eight and let GHC figure out the rest itself...

since these are green threads, 1 millisecond sparks should be
acceptable and may be even 1 microsecod too. afair, overhead expenses
was significantly reduced in ghc 6.12, soon to be released


-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com