Why is the Rust compiler so slow?

My homepage takes 73ms to rebuild: 17ms to recompile the static site generator, then 56ms to run it.

    andy@bark ~/d/andrewkelley.me (master)> zig build --watch -fincremental
    Build Summary: 3/3 steps succeeded
    install success
    └─ run exe compile success 57ms MaxRSS:3M
       └─ compile exe compile Debug native success 331ms
    Build Summary: 3/3 steps succeeded
    install success
    └─ run exe compile success 56ms MaxRSS:3M
       └─ compile exe compile Debug native success 17ms
    watching 75 directories, 1 processes

Neat, I guess?

This comment would be a lot better if it engaged with the posted article, or really had any sort of insight beyond a single compile time metric. What do you want me to take away from your comment? Zig good and Rust bad?

I think the most relevant thing is that building a simple website can (and should) take milliseconds, not minutes, and that -- quoting from the post:

> A brief note: 50 seconds is fine, actually!

50 seconds should actually not be considered fine.

As you've just demonstrated, that point can be made without even mentioning Zig, let alone copy/pasting some compile time stuff with no other comment or context. Which is why I thought (well, hoped) there might be something more to it than just a dunk attempt.

Now we get all of this off-topic discussion about Zig. Which I guess is good for you Zig folk... But it's pretty off-putting for me.

whoisyc's comment is extremely on point. As the VP of community, I would really encourage thinking about what they said.