Lambda for NodeJs doesn't / won't run multiple requests in the same process but different V8 contexts at the same time?

That sounds wasteful, and imo makes Cloudflare's Serverless tech superior for strictly network-io bound workloads. Lambda, to be fair, supports way many event triggers and all sorts of runtime and user-space constructs, but still manages warm start times <10ms which is really impressive.

But you can still have concurrency while handling a single invocation.

I’m new at this, and would love feedback if I’m wrong, but I think that a lambda instance could be reused if the system had need. As a result the best practice is to closure global-like data in the handler function itself. This would then get passed down through the layers much like Golang’s context.

I have many that call a handful of backend services, handle errors, process the data, and send it to the client.

Very async.