Hi Hécate,

Thank you this helps a lot. I now at least have confirmed my suspicion that it's the type checker. It spends a whopping 50 seconds in there for a module not even 300 lines of code. Is there someway to analyze the type checker specifically? I know there is tc-trace but that doesn't really tell me what is taking long.

Best regards,

Rowan Goemans

On 9/3/22 20:21, Hécate wrote:

Hi Rowan,

I had a nice experience using https://github.com/codedownio/time-ghc-modules. Do tell us if this fits your needs. :)

Cheers,

Hécate

Le 3 septembre 2022 16:31:35 rowan goemans <goemansrowan@gmail.com> a écrit :

Dear Cafe,

I have a Haskell Project where I have a module that quite heavily makes 

use of constraints and takes ages to compile per module. It also uses 

some type checker plugins but I'm unsure if they are causing the 

slowness. So what I would like to see is a breakdown of how much time 

GHC is spending on compilation of a module. Does something like this exist?

Best regards,

Rowan Goemans

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