The query hung for twelve seconds before timing out. Not the network. Not the database. It was the translation layer.
Zsh can speak to Postgres, but when you move from human-readable commands to the raw Postgres binary protocol, every microsecond matters. You don’t want to waste cycles on text parsing. You want precision — direct binary protocol proxying, without detours, without friction.
The Postgres binary protocol is the lowest-latency way to communicate between clients and the database. It strips away the extra overhead of text-based queries and delivers structured results faster. This is what powers high-throughput systems. But proxying it is a different beast. You need a proxy that can speak the binary language without corrupting or reinterpreting it.
Many proxies choke because they’re designed for text traffic. They split messages where they shouldn’t. They buffer too much. They try to inspect the stream and end up adding milliseconds. Binary protocol proxying requires precise handling of message boundaries, startup packets, authentication, prepared statements, and parameter formats. Errors here aren’t recoverable — one wrong byte in the stream and the session is dead.
Zsh isn’t the usual choice for this. But with the right glue, you can launch a proxy that accepts raw Postgres traffic, routes it where you want, and never decodes text it doesn’t need to. This can be part of a testing harness, a performance-tuning setup, or an on-the-fly middleware that measures, logs, or rewrites certain binary protocol messages.