thoughtbot/Argo

Make decoding lazy

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#185 建立於 2015年7月31日

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 (1 留言) (0 反應) (0 負責人)Swift (3,455 star) (214 fork)batch import
enhancementhelp wanted

描述

Now we have parse the whole JSON value into the JSON type, but then you have a lot of overhead when you have a lot of properties that you don't use. I tried this with a type DecodableValue that has a helper method to cast the data of the DecodableValue to the type that you want. DecodableValue replaces JSON and also saves a lot of looping and switches.

貢獻者指南

技術棧
swift
領域
backend
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
SwiftArgo libraryfunctional programming
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
25
研究方向
The issue proposes making JSON decoding lazy to avoid overhead from parsing unused properties. Currently, Argo parses the entire JSON value into its JSON type. The suggestion is to use a DecodableValue type with a cast helper method. Investigate the current JSON type and DecodableValue implementation in the Argo source (likely in Argo/Types/). Look for any existing discussions or PRs linked to this issue. Consider implementing a lazy wrapper that defers decoding until the value is accessed. This is a significant architectural change, so careful design is needed to maintain type safety.