How to get a heap visualization

David Feuer david.feuer at
Thu Aug 31 15:34:50 UTC 2017

Have you gotten in touch with Joachim? I think he's touched that space in
the not too murky past.

On Aug 31, 2017 11:18 AM, "Yitzchak Gale" <gale at> wrote:

> I wrote:
> >> I need a simple heap visualization for debugging purposes...
> >> Vacuum... has some long-outstanding PRs against it...
> >> that were never applied...
> >> Getting ghc-vis to compile looks hopeless...
> >> ghc-heap-view... is there a quick and simple
> >> visualizer for its output, without ghc-vis?
> Edward Z. Yang wrote:
> > Why not the plain old heap profiler?
> That didn't prove helpful in this case. We need to dive down
> into the structure of certain large and complex objects to find
> out what is happening.
> My plan is to see if I can apply the vacuum PR manually locally
> and see if I can get it working reasonably soon. If not, I guess
> I'll try running ghc-heap-view without visualization and see if I
> can make sense of the textual output.
> Actually, the profiling was done by someone else, not me.
> Now that you mention it, maybe I'll first give that another try
> myself and see if I can get any farther.
> Still, vacuum-style heap visualization is a really nice tool.
> It's a shame that it has fallen into such a state of disrepair.
> Thanks,
> Yitz
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