add slides for cutting down compilation times

[miguelraz]

I saw this video by Jon Gjengset

https://www.youtube.com/watch?v=pMiqRM5ooNw

And there's definitely a good slide deck that can be prepped.

I'm adding this issue as a self reminder.

[justahero]

There are a few articles out there that might be good resources for what to look out for to reduce compile times for larger projects.

• matklad's Fast Rust Builds

[miguelraz]

Yes, there's also the classic

• Why is my Rust build so slow by FasterThanLime

As well as

• Non generic inner functions