问当使用异步线程时，领域数据库大小为x100。

EN

    func loadDataForLocalCategory() {
        let URL = "SomeURL"
        Alamofire.request(.GET, URL).validate().responseJSON { response in
            switch response.result {
            case .Success:
                let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
                dispatch_async(dispatch_get_global_queue(priority, 0)) {

                if let value = response.result.value {
                    let realm = try! Realm()
                    let json = JSON(value)
                    for item in json["result"].arrayValue {
                        let localCategory = LocalDataCategory()
                        localCategory.id = item["id"].intValue
                        // print(item["name"].stringValue)
                        localCategory.name = item["name"].stringValue
                        try! realm.write {
                            realm.add(localCategory,update: true)
                        }
                    }
                  }
                }
            case .Failure(let error):
                print(error)
            }
        }
    }