swiftlang/swift

[SR-7136] Fast-path ad-hoc printing of Strings

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#49,684 建立於 2018年3月7日

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 (10 留言) (0 反應) (0 負責人)Swift (69,989 star) (10,719 fork)batch import
buggood first issuestandard library

描述
Previous ID SR-7136
Radar None
Original Reporter @jckarter
Type Bug

Attachment: Download
Votes 0
Component/s Standard Library
Labels Bug, StarterBug
Assignee None
Priority Medium

md5: 2686733126be82154b524085fb9de797

Issue Description:

Using Strings with print, string interpolation, String(describing:), etc., is extremely common, but goes through the generic protocol testing dispatch mechanism everything does. We should dynamically check whether something is a String and just print the string.

貢獻者指南

技術棧
swift
領域
performance
議題類型
performance
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。
1-3 hours
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。
fresh
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Swift programming languageUnderstanding of genericsFamiliarity with string interpolation
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。
70
研究方向
The issue proposes adding a dynamic type check for String in the generic printing dispatch. Investigate the current implementation in the Swift standard library, likely in the 'Print.swift' file. Look for the function that handles conversion to String and consider adding a fast path that directly prints the string without going through generics. Review comments on the issue for any prior discussion or attempted approaches.
[SR-7136] Fast-path ad-hoc printing of Strings · swiftlang/swift#49684 | Good First Issue