perf(go): get a specific messager by codegen without accessing MessagerMap and Type Assertion

[wenchy]

Problem

Cost of hub.GetHub().GetXXXConf() includes two parts:

• Access a Messager from map：MessagerMap
• Type Assertion

We want to avoid the cost to speed-up messager accessing.

loader/test/go-tableau-loader/protoconf/loader/hub.pc.go

Lines 216 to 226 in 1f6dc42

	// Auto-generated getters below
	func (h *Hub) GetHeroConf() *HeroConf {
	msger := h.GetMessager("HeroConf")
	if msger != nil {
	if conf, ok := msger.(*HeroConf); ok {
	return conf
	}
	}
	return nil
	}

Solution

// messagerContainer holds all messagers as named fields in struct for fast access.
type messagerContainer struct {
	MessagerMap MessagerMap
	LoadedTime  time.Time
	// all messagers as fields for fast access
	HeroConf           *HeroConf
	...
}

// Hub is the messager manager.
type Hub struct {
	messagerContainer atomic.Pointer[MessagerContainer]
	opts              *Options
}

 func (h *Hub) GetHeroConf() *HeroConf { 
 	return h.messagerContainer.Load().HeroConf
 } 

NOTE:

• How to process custom messagers? just access custom messager from MessagerMap as before.

[Kybxd]

A map is still needed to save custom confs