Having seen this before, I knew there had to be a compiler option for this... and checking the Debugging the Compiler section of the manual surfaces -dshow-passes, which should do exactly what you're asking for.

Richard

On Feb 18, 2021, at 10:53 AM, Martin Heuschober <epsilonhalbe@gmail.com> wrote:

Hi,

Is there a way to profile (time/space) GHC compilation itself, I'd be interested in what compilation steps in compiling my project take long and how much RAM it uses/why it uses so much RAM, so I can identify what to rewrite, remove, and split to get a leaner build.

Thanks,
Martin

PS.: I hope this is the right place to ask this.

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