WordPress implemented SQLite support! 😱 (Not merged into Core yet, but you’re able to test it.)
Update: Just tried the Performance Lab plugin with SQLite support enabled on a test WordPress instance using Docker. Do I see it right, that the plugin isn’t using SQLite WAL? That would probably give the whole thing a big speed boost. At least that’s what I do with GoBlog and my website is fast, right? 🤓