Phoenix json API extremely slow when serving CSV files

@lud you’re right about (not) beating php.
Very disappointed.
We were asked to migrate/refactory the old backend for APIs, developed 7 years ago on php5/nginx because it recently started to have performance issues: too many concurrent calls from the downstream API consumers. The cpu and memory were always at 100% on this server.
The idea of our IT solution architect was to switch to the Elixir/Phoenix stack for it’s performance using concurrent connections.
But it seem that this stack is far for being fast on processing individual requests… :neutral_face:
Honestly, I couldn’t imagine there it can be something worse than php in terms of performance.