> the few times I've looked deeply into the designs they are not implemented with execution speed in mind, or in some cases prematurely optimized in a way that

> the few times I've looked deeply into the designs they are not implemented with execution speed in mind, or in some cases prematurely optimized in a way that is actively detrimental [1]. I'm not sure citing uutils/coreutils as an example is fair. I love that project. I learned Rust contributing to that project, however, as the blog entry you cite itself notes: > I saw the maintainers themselves mention that a lot of the code quality isn’t great since a lot of contributions are from people who are very new to Rust I'm sure plenty of my slow code is still in `ls` and `sort` and that's okay?