Explicit calls to the garbage collector.

[Jurriaan Hage]

LS.

I have a very memory intensive application. It seems that the timing of my application 
depend very much on the precise setting of -H...M in the runtime system (-H2000M 
seems to work best, computation time becomes a third of what I get when I pass no
-H option).  I conjecture that this good behaviour is the result of gc happening at the right time.
So I wondered: if I can one when is the right time, is it possible then to trigger
GC explicitly from within the Haskell code? 

best,
Jur