Hello Taral, Monday, October 23, 2006, 1:12:38 PM, you wrote:

...

They probably are. However you get the overhead of creating the array (when you don't really need O(1) random access) and every thread signals the same semaphore which may lead to some congestion which could slow things down.

You do need O(1) random access for the writers to put their results in efficiently. And newArray_ should be faster than N copies of newEmptyMVar. It is true that I have one congestion point (the semaphone) instead of N (the mvars).

are you sure that writeArray calls may be overlapped? :) they may change some technical fields, such as 'dirty' bit -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com