Remove global mutex from abci client.

[egonspace]

Summary

We can(and must) remove the global mutex of abci client if abci server(app) controls concurrency by itself. If app controls concurrency by itself, we can have more chance to increase the concurrent performance.

type localClient struct {
	service.BaseService

	// TODO: remove `mtx` to increase concurrency. We could remove it because the app should protect itself.
	mtx *tmsync.Mutex
	// CONTRACT: The application should protect itself from concurrency as an abci server.
	types.Application

	globalCbMtx tmsync.Mutex
	globalCb    GlobalCallback
}

Problem Definition

Proposal

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[torao]

(accidentally closed by bot😱)