Obviously switching away from Cloud Functions does away with the architectural limitation of processing requests serially, but from my (limited) understanding of Node.js internals, Express applications are single-threaded anyway.
Do you have any idea of where your performance gains are coming from? Is there a lot of async, non-blocking waiting happening in the process of fulfilling requests against your API?
Do you have any idea of where your performance gains are coming from? Is there a lot of async, non-blocking waiting happening in the process of fulfilling requests against your API?