Gabe Levi

I'm guessing that my particular issue is just having a more than 1024 fds open, and passing through an fd > 1024 (FD_SETSIZE). I'm guessing this is the most common...

> It's normally recommended to use Lwt with libev (opam install conf-libev lwt) to avoid this problem. Is that an option for you? My project runs also runs on Windows,...

> This may have been fixed by 86a6baf, part of #569, which isn't part of a release yet. Unfortunately, that fix is for blocking fds. This issue is for non-blocking...

So consider what deriving is going to generate for your example. It's going to add `pp` and `show` to your signature. However no implementations are ever provided for `pp` and...

I suppose you could also just use something like [cppo](https://github.com/mjambon/cppo) to do it for you ```bash $ cat test.cppo.ml ``` ```ocaml #define MODULE(types) sig types end = struct types end...

It's possible that the new libs are adversely affecting Flow's performance. I can try importing and running our perf tests

Yeah, just anecdotally, the tests feel way slower. If I run ``` flow server --profile tests/promises ``` With flow v0.57.3, I get ``` TimingEvent `InitLibs`: start_wall_age: 0.064070; wall_duration: 0.687360; cpu_usage:...

I'm 100% open to a different format. JSON with only literals would be pretty easy to support. We do have a JS parser, so as long as we don't need...

I suppose this would be a good issue to resolve sooner rather than later, as it would be a breaking-ish change (I suppose we could support both for a while)....