Merge pull request #14135 from tkremenek/faster-print-4.1

tkremenek · web-flow · commit e3ba5664f98d · 2018-01-24T16:04:18.000-08:00
Remove pessimization of print() performance in 4.1 branch.
diff --git a/stdlib/public/core/OutputStream.swift b/stdlib/public/core/OutputStream.swift
@@ -624,7 +624,7 @@ extension Unicode.Scalar : TextOutputStreamable {
 }
 
 /// A hook for playgrounds to print through.
-public var _playgroundPrintHook : ((String) -> Void)? = {_ in () }
+public var _playgroundPrintHook : ((String) -> Void)? = nil
 
 @_fixed_layout // FIXME(sil-serialize-all)
 @_versioned // FIXME(sil-serialize-all)

Original file line number	Diff line number	Diff line change
`@@ -624,7 +624,7 @@ extension Unicode.Scalar : TextOutputStreamable {`
`624`	`624`	`}`
`625`	`625`
`626`	`626`	`/// A hook for playgrounds to print through.`
`627`		`-public var _playgroundPrintHook : ((String) -> Void)? = {_ in () }`
	`627`	`+public var _playgroundPrintHook : ((String) -> Void)? = nil`
`628`	`628`
`629`	`629`	`@_fixed_layout // FIXME(sil-serialize-all)`
`630`	`630`	`@_versioned // FIXME(sil-serialize-all)`