Although naively factored builds can be slow on rust, I firmly believe that most folks complaining about this problem have not taken the time to learn how to do this and their builds could be perhaps 10x faster. Bringing this up an important counter-point that all too frequently is ignored or met with hostility, as this replier has done.

I do not understand how you justify your claims. Should I link any number of instances where Rust team members admit to compile times being a major issue, one which prompts significant effort to improve? Perhaps you are right about 10x speedups, but then that clearly isn't enough, reading the room.

I also do not understand how you see hostility in my comment. For one thing, I did not downvote you. Rather, your original comment is dismissive, even if the article it replies to is dubious. For another, it would also be trivial to see that I am both highly supportive and informed about Rust. Your comments simply do not help, certainly not with the common perception of Rust fans as zealots.

Don’t know what to tell you. Just trying to keep things real in response to a highly ungrounded post. The issues with compilation times are as severe an issue because of the reason I mentioned — folks don’t like to think about how they factor their build. So some members of the core team are sympathetic to that — and for good reason.

But the virtues of shifting context to the build and refactoring it is rarely discussed and would alleviate many individuals problems. I see it rarely mentioned, just “rust is slow to compile” so I really do feel it should be discussed more; even if I could have perhaps mentioned it in a way you (and others?) would have experienced as less dismissive.

I can't speak for everyone, or even the majority, but I know that oftentimes large projects focus on build times, undergoing refactorings as you describe, and their compile times are still high. To make up some numbers, maybe the fraction of projects that have unacceptable compile times could be reduced from 80% to 40% (at what effort?), but that 40% remainder probably includes many large, popular crates.