rhun

There’s something gloriously rebellious about writing a code editor in assembly in 2025. We’ve spent a decade watching editors pile on features, plugins, and background processes until they feel less like tools and more like operating systems. rhun flips the script: no massive runtime, no JavaScript VM, no 500MB install. Just raw speed and minimalism, the way your grandpa’s C compiler intended. This isn’t just a novelty—it’s a signal. The startup ecosystem loves "full-stack" and "AI-powered" everything, but there’s a counter-movement of developers who are obsessed with latency, binary size, and the joy of constraints. Projects like rhun remind us that performance isn’t a feature you bolt on later; it’s a design philosophy. For founders building developer tools, the lesson is clear: speed is the ultimate differentiator, and sometimes less really is more. Of course, assembly-level development isn’t for everyone. The maintenance burden, the portability headaches, and the sheer masochism required are real. But that’s exactly why rhun is interesting—it’s a proof of concept that pushes the boundaries of what "small and fast" can mean. If a tiny editor written in assembly can carve out a niche, imagine what else could be rebuilt from the ground up with radical simplicity in mind. Startup Signal loves a good contrarian bet. rhun might not replace VS Code tomorrow, but it’s a beautiful reminder that the next big thing often starts with a tiny binary. Keep an eye on this one—and maybe on your CPU usage while you’re at it. Source: [rhun on Product Hunt](https://www.producthunt.com/products/rhun)