Hello Andrew, Sunday, April 20, 2008, 11:41:52 PM, you wrote: yes, GC behavior has significant impact on any new language (i mean java, c#, f# and so on)
1. Does running the GC force all threads to stop? I know some GC designs do this, but I have no idea how the one GHC implements works.
yes
2. Is the GC still single-threaded? (GHC 6.8.2 here.)
yes. multi-threaded GC is planned gor next ghc version, afair
3. Is there any way for a running Haskell program to find out how much heap space is currently allocated / used / free?
i think it's possible by asking internal RTS vars. SM once suggested to add to GHC library that provides official way to ask this info but no volunteer was happen :) -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com