Elm Compiler running forever, computer just getting hot

Question

I'm not sure what's causing this issue, but in a project, I'm building, the compiler is taking hours just to compile a module. The total size of my codebase is 352KB, but none of the modules are over 10KB large. I am using a Native port, but it's very trivial; I'm just fetching Date.now() with it.

Is there anything well-known that would cause the elm compiler to take forever to compile? I don't have many dependencies, but I'm using Html a lot. I would really appreciate any hints as to what would cause this.

Edit

So it turns out large case expressions will cause the optimizer to take a long time, as of 0.16. Here's the discussion on Elm-Discuss bringing up the issue, and a gist of the nasty case match.

I guess to be verbose and to keep a carrot out there, why would elm's compiler take this route for case-matching? What's the underlying machinery going on here? Why would the compiler take longer than an hour for optimizing 60+ pattern matches on a case statement?

Answer 1

Large case expressions will cause the optimizer to take a long time, as of 0.16. Here's the discussion on Elm-Discuss bringing up the issue, and a gist of the nasty case match.