> I sometimes wonder if Rust (or more accurately Cargo) needs a third default profile “fastbuild” that doesn’t have debug info and is optimised for building fast.<p>I’d go even further and say that cargo should have an option for simply checking if the code compiles (and borrow checks), but doesn’t even link it. 95% of the time when I’m writing code, I run cargo to see if the code I just wrote, compiles. Then it tells me about an error, I try to fix it, then run cargo again. In each of these instances I don’t even need to run or even link the code.<p>I use an IDE with LSP/rust-analyzer support to get errors as I type but it doesn’t catch a lot of errors (and doesn’t seem run borrow checking) so I need to do a cargo build to get the full error report, I just want this loop to be faster.
Note that making shared generics protected breaks pointer equality when multiple shared libraries are involved. I'm pretty sure this is illegal in C++ but I'm not sure about Rust's rules.