[Haskell] memory management

[Simon Marlow]

On 06/08/2009 08:22, Simon Peyton-Jones wrote:
> | In the early to mid '90s we built various heap-profiling tools to
> | examine the characteristics of heap data in lazy functional programs.
> | You can find papers describing this work by Googling "heap profiling".
> | You may be particularly interested in the investigation of "heap lag"
> | and "heap drag" -- see for example the ICFP'96 paper.  Others have
> | worked on similar tools since, but I'm not sure how extensive heap
> | profiling facilities are in ghc, the most widely used implementation of
> | Haskell.
>
> GHC has pretty good heap profiling, including lag/drag/void.  I hope they are still working smoothly, although I don't think they have received much love recently.

The lag/drag/void stuff (aka biographical profiling) was a bit broken 
for a while after pointer tagging was introduced, but should be fine now.

Cheers,
	Simon