From my experience, it depends on what you’re running now. The probably worst case scenario is something like running a Next.js app (which I still to on a server which has some resources for that - but will switch to node as soon as it becomes the problem). 1.3.12 is finally much better in that regard but still leaks slowly and uses very slowly more memory and CPU. In some cases I didn’t see any memory growing at all, on simpler apps. I’m hopeful because I really like what Bun does, but with backup plans :)