Supporting Postgres Named Prepared Statements in Hyperdrive

Cloudflare's Hyperdrive recently added support for Postgres protocol-level named prepared statements across pooled connections. Named prepared statements allow Postgres to cache query execution plans, providing potentially substantial performance improvements. This feature is now available to users without needing any significant changes to their applications. The implementation of this feature in Hyperdrive involved challenges such as buffering messages and taking a connection from the pool while maintaining transparency for clients and servers.