Golang中Go例程的开销

Question

So I understand go routines have low overhead, but I'm wondering just how good they are. If I have a server that handles incoming messages how does creating a new go routine to process each incoming message compare to using the standard producer/consumer model with channels?

Like is it reasonable to have a high performance go server that spawns new go routines for ever incoming request.

Answer 1

The built-in http package uses a goroutine for each connection and there are numerous benchmarks showing it being able to handle thousands of concurrent users. So unless you have many connections with many messages each, I'd say it's reasonable to create a new goroutine for each message. And in any case, go has a nice benchmarking feature you can use to verify your assumptions.

https://golang.org/src/net/http/server.go#L2137