Compilation takes almost 20 minutes

[Theemuts]

Hi,

I'm not sure if this is a (known) issue, but I've added this library as a dependency yesterday, and if it needs to be compiled it takes nearly 20 minutes on my computer (i5 2550K, 8GB ram, Ubuntu 16.04, rustc 1.12) regardless of the compilation target. Considering that I've not had to deal with compilation times over a minute or two, this seems odd to me.

[meh]

This must be a regression in rustc, it used to take some time, but not that long.

You should probably open an issue on the Rust repository.

[meh]

The stuff taking time to compile is every source in event/, it uses the custom_derive crate, so it's probably because of that.

[Theemuts]

Thanks for the reply, I've opened an issue in the Rust repo.

[oberien]

For reference: rust-lang/rust/issues/37074

[meh]

Glory to @Mark-Simulacrum, closed by rust-lang/rust#42533.