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And now compilation is waaay faster... From 12 hours to, probably few seconds

can you re-link the project github here? I'm very interested in seeing the changes

sure, but among ALL the changes, I have no idea what was that dropped it dramatically. Florian Verdonck suggested to upgrade to the latest FsAst for performance improvements and I also upgraded Myriad and made a bunch of stuff cached/parallel.

Awesome. I’m really curious to what you did to optimize performance. 

have a look, I did all sort of stuff, I really wish I knew what made the massive difference :slightly_smiling_face:

dotTrace suggested hot spots, but I'm not convinced it was just that

<@U0179S0JJ8P> I just realised I mentioned you here ^ right before you joined the workspace :slightly_smiling_face: as I was trying to tag you yesterday. Whatever you did probably made also a huge difference to performances in my Pulumi library. I can't really trace the performance improvements, but thanks :slightly_smiling_face:

Hey <@U014RBY3Y6L>, yeah I joined a couple of days ago. We had some performance issues in Fantomas and started a benchmark some months ago.
<https://fsprojects.github.io/fantomas/> I guessing you will have had the same problem.

Yes, the generation took &gt;12 hours, now it's down to a minute. Thanks for your suggestion on GitHub.