我有一个 Realm 闭包，用于更新已更改的行:

try realm.write {

                  realm.create(Product.self, value: ["itemgroup": item.itemgroup,
                                                     "itembrand": item.itembrand,
                                                     "itemtype": item.itemtype,
                                                     "itemsubtype": item.itemsubtype,
                                                     "basedescription": item.basedescription,
                                                     "info": item.info,
                                                     "upc": item.upc,
                                                     "upc2": item.upc2,
                                                     "upc3": item.upc3,
                                                     "upc4": item.upc4,
                                                     "upc5": item.upc5,
                                                     "baseprice": item.baseprice,
                                                     "proprice": item.proprice,
                                                     "retailprice": item.retailprice,
                                                     "stdprice": item.stdprice,
                                                     "caseqty": item.caseqty,
                                                     "spord": item.spord,
                                                     "category": item.category,
                                                     "categorycode": item.categorycode,
                                                     "allowinbc": item.allowinbc,
                                                     "allowinab": item.allowinab], update: true)
                }

但是，编译需要将近 10 分钟!

这是我的模型类:

class Product: Object {

    dynamic var itemno: String = ""
    dynamic var itemgroup: String = ""
    dynamic var itembrand: String = ""
    dynamic var itemtype: String = ""
    dynamic var itemsubtype: String = ""
    dynamic var basedescription: String = ""
    dynamic var info: String = ""
    dynamic var upc: String = ""
    dynamic var upc2: String = ""
    dynamic var upc3: String = ""
    dynamic var upc4: String = ""
    dynamic var upc5: String = ""
    dynamic var baseprice: Double = 0.00
    dynamic var proprice: Double = 0.00
    dynamic var retailprice: Double = 0.00
    dynamic var stdprice: Double = 0.00
    dynamic var caseqty: Int = 0
    dynamic var spord: String = ""
    dynamic var category: String = ""
    dynamic var categorycode: String = ""
    dynamic var allowinbc: String = ""
    dynamic var allowinab: String = ""

    override class func primaryKey() -> String {
        return "itemno"
    }

    convenience init(itemno: String, itemgroup: String, itembrand: String, itemtype: String, itemsubtype: String, basedescription: String, info: String, upc: String, upc2: String, upc3: String, upc4: String, upc5: String, baseprice: Double, proprice: Double, retailprice: Double, stdprice: Double, caseqty: Int, spord: String, category: String, categorycode: String, allowinbc: String, allowinab: String) {

        self.init()
        self.itemno = itemno
        self.itemgroup = itemgroup
        self.itembrand = itembrand
        self.itemtype = itemtype
        self.itemsubtype = itemsubtype
        self.basedescription = basedescription
        self.info = info
        self.upc = upc
        self.upc2 = upc2
        self.upc3 = upc3
        self.upc4 = upc4
        self.upc5 = upc5
        self.baseprice = baseprice
        self.proprice = proprice
        self.retailprice = retailprice
        self.stdprice = stdprice
        self.caseqty = caseqty
        self.spord = spord
        self.category = category
        self.categorycode = categorycode
        self.allowinbc = allowinbc
        self.allowinab = allowinab
    }

}

我可以对我的代码做些什么来加快编译速度？

谢谢。

最佳答案

这里没有真正的“最佳”答案，因为所有答案都非常有帮助。编译大型 Swift 字典的最快方法是不让编译器推断任何东西 的类型。这意味着您需要定义字典中每个项目的数据类型(包括字典本身)。

我的字典编译最快的方法是:

try realm.write {

              let dict: [String: Any] = ["itemgroup": item.itemgroup as String,
                                         "itembrand": item.itembrand as String,
                                         "itemtype": item.itemtype as String,
                                         "itemsubtype": item.itemsubtype as String,
                                         "basedescription": item.basedescription as String,
                                         "info": item.info as String,
                                         "upc": item.upc as String,
                                         "upc2": item.upc2 as String,
                                         "upc3": item.upc3 as String,
                                         "upc4": item.upc4 as String,
                                         "upc5": item.upc5 as String,
                                         "baseprice": item.baseprice as Double,
                                         "proprice": item.proprice as Double,
                                         "retailprice": item.retailprice as Double,
                                         "stdprice": item.stdprice as Double,
                                         "caseqty": item.caseqty as Int,
                                         "spord": item.spord as String,
                                         "category": item.category as String,
                                         "categorycode": item.categorycode,
                                         "allowinbc": item.allowinbc as String,
                                         "allowinab": item.allowinab as String]

              realm.create(Product.self, value: dict, update: true)
            }

关于Swift 字典需要很长时间才能编译，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42702559/