Over the past week or two, I’ve been working on refactoring and improving Haiku’s “user_mutex” code, which is the kernel-side component of mutex (locks) for userland applications. While there’s probably still more that can be done in the future, what I have accomplished already makes a significant difference for many applications. GLTeapot’s FPS is about doubled, for example. I would like to get at least a few more people testing the builds before merging the changes, since this logic is pretty...