Parallel rustc is very exciting! (Thanks to @SimonSapin for making these measurements!)
See: https://internals.rust-lang.org/t/help-test-parallel-rustc/11503 …pic.twitter.com/6OuNeuoZIk
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Arguably, it does because it *has* to. Because at the same number of lines of code, C++ is still way faster to compile. Take Firefox, for example. Rust is less than 10% of the code base but I'm sure it's well over 20% of the CPU time (and I'm not even talking about wall time).
I would like to figure out why that is. I think some of it may be that Rust code tends to be more dense line-for-line (i.e. each line of Rust corresponds to more machine code than each line of C++). This could probably be experimentally measured.
That rustc moves so quickly is part of what excites me about Rust
Writing your compiler in a usable language helps. 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.