planetscale (if I need rdbms) or firestore or dynamodb (if I need just document). I checked latency of planetscale and dynamodb from frankfurt,paris,singapore f

planetscale (if I need rdbms) or firestore or dynamodb (if I need just document). I checked latency of planetscale and dynamodb from frankfurt,paris,singapore from DO/linode/scaleway to db in same region; these are low latency (mostly single digit). For single server, I'd just use sqlite.