The parallel option is now an official feature

cmd_import_test.go

@@ -23,7 +23,7 @@ func TestDoImport(t *testing.T) {
 		name: "normal",
 		args: []string{},
 	}, {
-		name: "parallel (Experimental)",
+		name: "parallel",
 		args: []string{"-parallel"},
 	}}
 

commands.go

@@ -77,7 +77,7 @@ var commandImport = &cli.Command{
 	Action: doImport,
 	Flags: append(cloneFlags,
 		&cli.BoolFlag{Name: "parallel", Aliases: []string{"P"},
-			Usage: "[Experimental] Import parallely"}),
+			Usage: "Import parallely"}),
 }
 
 var commandRoot = &cli.Command{