sindresorhus/Defaults

Cache bridge deserialization

Open

#138 建立於 2023年5月24日

在 GitHub 查看
 (2 留言) (0 反應) (0 負責人)Swift (162 fork)user submission
enhancementhelp wanted

倉庫指標

Star
 (2,465 star)
PR 合併指標
 (30 天內沒有已合併 PR)

描述

struct User3: Codable, Defaults.Serializable {
    let name: String
    let age: String
}

extension Defaults.Keys {
    static let user3 = Key<User3>("user3", default: .init(name: "Hello", age: "24"))
}
...
    func test2() {
        print(Defaults[.user3])
        print(Defaults[.user3])
    }
...

The above code will call bridge.deserialize twice. If user3 is an array and there are many attributes of the User3 type, will it affect performance?

Would it be better to cache the data after Defaults[.user3] is executed once?

extension Defaults.Serializable {
	....
	static func toValue(_ anyObject: Any) -> Self? {
		// Return directly if `anyObject` can cast to Value, since it means `Value` is a natively supported type.
		if
			isNativelySupportedType,
			let anyObject = anyObject as? Self
		{
			return anyObject
		} else if let value = bridge.deserialize(anyObject as? Serializable) {
			return value as? Self
		}

		return nil
	}
        ....

貢獻者指南