force open LevelDB in parallel

Author: zoom-ua

go/libkb/globals.go

@@ -651,10 +651,14 @@ func (g *GlobalContext) configureDiskCachesLocked() error {
 	g.LocalDb = NewJSONLocalDb(NewLevelDb(g, g.Env.GetDbFilename))
 	g.LocalChatDb = NewJSONLocalDb(NewLevelDb(g, g.Env.GetChatDbFilename))
 
-	epick := FirstErrorPicker{}
-	epick.Push(g.LocalDb.Open())
-	epick.Push(g.LocalChatDb.Open())
-	return epick.Error()
+	// Pre-warm both DBs concurrently. Open() is a no-op (lazy open via
+	// sync.Once), so kick off ForceOpen in goroutines instead. Any
+	// subsequent DB operation will block on sync.Once until its open
+	// completes — no further synchronization needed here.
+	go func() { _ = g.LocalDb.ForceOpen() }()
+	go func() { _ = g.LocalChatDb.ForceOpen() }()
+
+	return nil
 }
 
 func (g *GlobalContext) ConfigureMerkleClient() error {

go/service/main.go

@@ -303,13 +303,6 @@ func (d *Service) Run() (err error) {
 		return
 	}
 
-	if err = d.G().LocalDb.ForceOpen(); err != nil {
-		return err
-	}
-	if err = d.G().LocalChatDb.ForceOpen(); err != nil {
-		return err
-	}
-
 	var l net.Listener
 	if l, err = d.ConfigRPCServer(); err != nil {
 		return err