swiftlang/swift

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

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#49,684 opened on Mar 7, 2018

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Description
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.

Contributor guide

Research direction
Inspect how String printing is currently handled via generic protocol dispatch and implement a fast path dynamic check to directly print Strings.
Tech stack
swift
Domain
performance
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
SwiftGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75