I built a little micro CMS backend for myself that I’m working on open sourcing which is pretty much this. It parses markdown files with frontmatter into html on startup and stores them in an in memory SQLite database. So you have no real content rendering overhead, and you get the little extra bonuses like full text search with FTS4 by default. I use it with sveltekit and it’s pretty cool, strikes a nice balance and is hilariously fast.