Add CallAsync analogue without a context

[oleg-jukovec]

The context usage:

go-vshard-router/replicaset.go

Line 168 in bdd3ef5

Context(ctx).

leads to creating a goroutine for each request. It's very expensive (especially in context.Background() case). A faster way is to rely on setting a timeout on the entire connection with tarantool.Opts.Timeout:

https://github.com/tarantool/go-tarantool/blob/c0a8ad307468471132652fb3829525b813762bc7/connection.go#L281-L292

So there is should be something like (need to think about naming):

func (rs *Replicaset) CallAsyncWithTimeout(opts ReplicasetCallOpts, fnc string, args interface{}) *tarantool.Future {

I would suggest adapting the request logic from the Go connector in the v3 library. This logic with FooAsync, FooTyped, FooWithContext, FooWithoutContextAsync it only seems simple, but in fact it is hard to maintain all this stuff.

[oleg-jukovec]

Workaround is use nil as a context:

CallAsync(nil, opts, "foo", []any{})

But it is really very strange.

[nurzhan-saktaganov]

leads to creating a goroutine for each request.

@oleg-jukovec you mean go-tarantool creates a goroutine for request if there is a non-nil context?

[oleg-jukovec]

@oleg-jukovec you mean go-tarantool creates a goroutine for request if there is a non-nil context?

Yes, I am.

[nurzhan-saktaganov]

Does using the Pooler() method solve your issue?

go-vshard-router/replicaset.go

Lines 69 to 71 in 8c23952

	func (rs *Replicaset) Pooler() pool.Pooler {
	return rs.conn
	}