Building Faster in Xcode

Transcription

1 #WWDC18 Building Faster in Xcode Session 408 David Owens, Xcode Engineer Jordan Rose, Swift Engineer 2018 Apple Inc. All rights reserved. Redistribution or public display not permitted without written permission from Apple.

2 Building Faster in Xcode

3 Building Faster in Xcode Increasing Build Efficiency Reducing the Work on Rebuilds

4 Building Faster in Xcode Increasing Build Efficiency Reducing the Work on Rebuilds Parallelizing your build process Declaring script inputs and outputs Measuring your build time

5 Building Faster in Xcode Increasing Build Efficiency Reducing the Work on Rebuilds Parallelizing your build process Declaring script inputs and outputs Measuring your build time Understanding dependencies in Swift Dealing with complex expressions Limiting your Objective-C/Swift interface

6 Parallelizing Your Build Increasing build efficiency

7 Xcode s Targets and Dependencies

8 Xcode s Targets and Dependencies Target specifies a product to build ios App Framework Game Unit Tests Framework

9 Xcode s Targets and Dependencies Target specifies a product to build ios App Framework Game Unit Tests Target dependency requires another target Explicit via Target Dependencies Implicit via Link Binary with Libraries Framework

10 Game Dependency Graph Tests Game Shaders Physics Utilities

11 Game Dependency Graph Tests Game List of all targets to build Shaders Physics Utilities

12 Game Dependency Graph Tests Game List of all targets to build Dependency between targets Shaders Physics Utilities

13 Game Dependency Graph List of all targets to build Dependency between targets Build order can be derived Physics Utilities Shaders Game Tests

14 Serialized Build Timeline Physics Utilities Shaders Game Tests

15 Serialized Build Timeline Physics Utilities Shaders Game Tests

16 Parallelized Build Timeline

17 Parallelized Build Timeline

18 Parallelized Build Timeline Amount of work did not change

19 Parallelized Build Timeline Amount of work did not change Time to build decreased

20 Parallelized Build Timeline Time savings Amount of work did not change Time to build decreased

21 Parallelized Build Timeline Time savings Amount of work did not change Time to build decreased Increased hardware utilization

22 Extreme Parallelization

23 Extreme Parallelization

24 How do we get there?

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28 Project Configuration Tests Game Shaders Physics Utilities

29 Project Configuration Tests Game Shaders Physics Utilities

30 Project Configuration Tests Game Shaders Physics Utilities

31 Game Target Dependencies Game

32 Game Target Dependencies Game Physics Utilities

33 Game Target Dependencies Game Physics Utilities

34 Game Target Dependencies Game Shaders Physics Utilities

35 Game Target Dependencies Game Shaders Physics Utilities

36 Shaders Target Dependencies Shaders Utilities

37 Utilities Target Dependencies Physics Utilities

38 Tests Target Dependencies Tests Game Shaders Utilities

39 Examine Tests Dependencies Tests Game Shaders Utilities

40 Examine Tests Dependencies UI Tests (Game) Tests (Shaders) Tests (Utilities) Game Shaders Utilities

41 Examine Tests Dependencies UI Tests (Game) Tests (Shaders) Tests (Utilities) Game Shaders Utilities

42 Examine Tests Dependencies UI Tests (Game) Tests (Shaders) Tests (Utilities) Game Shaders Utilities

43 Reduce Dependency Exposure Game Shaders Physics Utilities

44 Reduce Dependency Exposure Game Shaders Physics Utilities

45 Reduce Dependency Exposure Game Shaders Physics Code Gen Utilities

46 Reduce Dependency Exposure Game Shaders Physics Code Gen Utilities

47 Examine Unused Dependencies Physics Utilities

48 Examine Unused Dependencies Physics Utilities

49 Examine Unused Dependencies Physics Utilities

50 Target Build Process

51 Parallelized Target Build Process NEW

52 Parallelized Target Build Process NEW

53 Parallelized Target Build Process NEW Compile sources can start earlier

54 Parallelized Target Build Process NEW Compile sources can start earlier Waits only for what it needs

55 Parallelized Target Build Process NEW Compile sources can start earlier Waits only for what it needs Must wait for Run Script phases

56 Run Script Phases Reducing the work on rebuilds

57 Allows you to customize your build process for your exact needs.

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64 File Lists # assets.xcfilelist # Game # Asset masters $(SRCROOT)/Assets/game.psd $(SRCROOT)/Assets/player.psd $(SRCROOT)/Assets/hud.psd

65 File Lists Newline separated # assets.xcfilelist # Game # Asset masters $(SRCROOT)/Assets/game.psd $(SRCROOT)/Assets/player.psd $(SRCROOT)/Assets/hud.psd

66 File Lists Newline separated # assets.xcfilelist # Game Support for build setting variables # Asset masters $(SRCROOT)/Assets/game.psd $(SRCROOT)/Assets/player.psd $(SRCROOT)/Assets/hud.psd

67 File Lists Newline separated # assets.xcfilelist # Game Support for build setting variables # Asset masters Cannot be generated during the build $(SRCROOT)/Assets/game.psd $(SRCROOT)/Assets/player.psd $(SRCROOT)/Assets/hud.psd

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72 When the Run Script Phase is Run No input files declared Input files changed Output files missing

73 Documentation NEW

74 Dependency Cycle Detection NEW

75 More on Dependency Cycles NEW

76 More on Dependency Cycles NEW

77 Measuring Build Time Increasing build efficiency

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80 Build Log Filters

81 Build Log Filters

82 Build With Timing Summary NEW

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87 $ xcodebuild -showbuildtimingsummary Build Timing Summary CompileSwiftSources (1 task) seconds PhaseScriptExecution (1 task) seconds CompileAssetCatalog (1 task) seconds CompileStoryboard (1 task) seconds CompileMetalFile (5 tasks) seconds CopySwiftLibs (1 task) seconds Ld (2 tasks) seconds CodeSign (3 tasks) seconds CompileC (1 task) seconds MetalLink (2 tasks) seconds Ditto (4 tasks) seconds LinkStoryboards (1 task) seconds

88 $ xcodebuild -showbuildtimingsummary Build Timing Summary CompileSwiftSources (1 task) seconds PhaseScriptExecution (1 task) seconds CompileAssetCatalog (1 task) seconds CompileStoryboard (1 task) seconds CompileMetalFile (5 tasks) seconds CopySwiftLibs (1 task) seconds Ld (2 tasks) seconds CodeSign (3 tasks) seconds CompileC (1 task) seconds MetalLink (2 tasks) seconds Ditto (4 tasks) seconds LinkStoryboards (1 task) seconds

89 Source-Level Improvements Jordan Rose, Swift Engineer

90 Remove this build time workaround Reducing the work on rebuilds

91 Turn off Whole Module Mode For Debug Builds

92 Turn off Whole Module Mode For Debug Builds

93 Turn off Whole Module Mode For Debug Builds What s New in Swift WWDC 2018 Behind the Scenes of the Xcode Build Process Hall 2 Friday 2:00PM

94 Increasing Build Efficiency Reducing the Work on Rebuilds Parallelizing your build process Declaring script inputs and outputs Measuring your build time Understanding dependencies in Swift Dealing with complex expressions Limiting your Objective-C/Swift interface

95 Dealing with complex expressions Understanding dependencies in Swift Limiting your Objective-C/Swift interface

96 When a build takes a long time, there is often a key piece of information you can add to make it better.

97 Dealing with Complex Expressions Increasing build efficiency

98 Use Explicit Types for Complex Properties struct ContrivedExample { var bignumber = [4, 3, 2].reduce(1) { sofar, next in pow(next, sofar) }. }.

99 Use Explicit Types for Complex Properties struct ContrivedExample { var bignumber: Double = [4, 3, 2].reduce(1) { sofar, next in pow(next, sofar) }. }.

100 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) {. sofar, next in }. }.

101 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) {. sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

102 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) {. sofar, next in }. sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. error: the compiler is unable to type-check this expression in reasonable time

103 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) {. sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

104 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { ( sofar : Int?, next : Int?) -> Int? in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

105 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

106 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

107 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

108 Provide Types in Complex Closures func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in sofar!= nil && next!= nil? sofar! + next! : (sofar!= nil? sofar! : (next!= nil? next! : nil)) }. }.

109 Break Apart Complex Expressions func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in } }

110 Break Apart Complex Expressions func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in if sofar!= nil && next!= nil { return sofar! + next! } if sofar!= nil { return sofar! } if next!= nil { return next! } return nil } }

111 Break Apart Complex Expressions func sumnonoptional(i: Int?, j: Int?, k: Int?) -> Int? { return [i, j, k].reduce(0) { sofar, next in if let sofar = sofar { if let next = next { return sofar + next } return sofar } else { return next } } }

112 Use AnyObject Methods and Properties Sparingly weak var delegate: AnyObject? func reportsuccess() { delegate?.myoperationdidsucceed(self) }.

113 Use AnyObject Methods and Properties Sparingly weak var delegate: AnyObject? func reportsuccess() { delegate?.myoperationdidsucceed(self) }.

114 Use AnyObject Methods and Properties Sparingly weak var delegate: AnyObject? func reportsuccess() { delegate?.myoperationdidsucceed(self) }.

115 Use AnyObject Methods and Properties Sparingly weak var delegate: AnyObject? func reportsuccess() { delegate?.myoperationdidsucceed(self) }.?

116 Use AnyObject Methods and Properties Sparingly Define a protocol instead weak var delegate: AnyObject? func reportsuccess() { delegate?.myoperationdidsucceed(self) }. protocol MyOperationDelegate: class { } func myoperationdidsucceed(_ operation: MyOperation)

117 Use AnyObject Methods and Properties Sparingly Define a protocol instead weak var delegate: MyOperationDelegate? func reportsuccess() { delegate?.myoperationdidsucceed(self) }. protocol MyOperationDelegate: class { } func myoperationdidsucceed(_ operation: MyOperation)

118 Use AnyObject Methods and Properties Sparingly Define a protocol instead weak var delegate: MyOperationDelegate? func reportsuccess() { delegate?.myoperationdidsucceed(self) }. protocol MyOperationDelegate: class { } func myoperationdidsucceed(_ operation: MyOperation)

119 Understanding Dependencies in Swift Reducing the work on rebuilds

120 Incremental Builds Are File-Based struct Point { } var x, y: Double

121 Incremental Builds Are File-Based struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double } let distance = sqrt(point.x * point.x + point.y * point.y)

122 Incremental Builds Are File-Based struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double } let distance = sqrt(point.x * point.x + point.y * point.y)

123 Incremental Builds Are File-Based struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isnormal) assert(y.isnormal) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } }

124 Incremental Builds Are File-Based struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isnormal) assert(y.isnormal) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } }

125 Incremental Builds Are File-Based Changes in function bodies do not affect other files struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isfinite) assert(y.isfinite) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } }

126 Incremental Builds Are File-Based Changes in function bodies do not affect other files struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isfinite) assert(y.isfinite) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } }

127 Incremental Builds Are File-Based Unrelated changes outside function bodies can still result in rebuilding struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isfinite) assert(y.isfinite) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } } struct PathSegment { var start, end: Point }

128 Incremental Builds Are File-Based Unrelated changes outside function bodies can still result in rebuilding struct Point { let point = Point(x: 3.0, y: 4.0) var x, y: Double init(x: Double, y: Double) { assert(x.isfinite) assert(y.isfinite) let distance = sqrt(point.x * point.x + point.y * point.y) self.x = x self.y = y } } struct PathSegment { var start, end: Point }

129 Dependencies Within a Target Are Per-File GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

130 Dependencies Within a Target Are Per-File GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

131 Dependencies Within a Target Are Per-File GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

132 Dependencies Within a Target Are Per-File GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

133 Dependencies Within a Target Are Per-File GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

134 Cross-Target Dependencies Are Coarse-Grained GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

135 Cross-Target Dependencies Are Coarse-Grained GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

136 Cross-Target Dependencies Are Coarse-Grained GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

137 Cross-Target Dependencies Are Coarse-Grained GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

138 Cross-Target Dependencies Are Coarse-Grained GameView.swift SyncManager.swift MenuController.swift GameAI.swift PlayerState.swift

139 Swift Dependency Rules

140 Swift Dependency Rules Compiler must be conservative

141 Swift Dependency Rules Compiler must be conservative Changes in function bodies do not affect the file s interface

142 Swift Dependency Rules Compiler must be conservative Changes in function bodies do not affect the file s interface Dependencies within a module are per-file

143 Swift Dependency Rules Compiler must be conservative Changes in function bodies do not affect the file s interface Dependencies within a module are per-file Dependencies across targets are for the whole target

144 Limiting Your Objective-C/Swift Interface Reducing the work on rebuilds

145 Mixed-Source App Targets

146 Mixed-Source App Targets

147 Mixed-Source App Targets Bridging header

148 Mixed-Source App Targets Bridging header

149 Mixed-Source App Targets Bridging header Generated header

150 Mixed-Source App Targets Bridging header Generated header

151 Mixed-Source App Targets Bridging header Generated header

152 Mixed-Source App Targets Bridging header Generated header

153 Mixed-Source App Targets Bridging header Generated header

154 Keep Your Generated Header Minimal Use private when possible class MainViewController: UIViewController var statusfield: func close(_ sender: Any?) { } }

155 Keep Your Generated Header Minimal Use private when possible class MainViewController: UIViewController var statusfield: func close(_ sender: Any?) { } IBOutlet UITextField *statusfield; - (IBAction)close:(id)sender;

156 Keep Your Generated Header Minimal Use private when possible class MainViewController: UIViewController private var statusfield: private func close(_ sender: Any?) { } IBOutlet UITextField *statusfield; - (IBAction)close:(id)sender;.

157 Keep Your Generated Header Minimal Use private when possible class MainViewController: UIViewController private var statusfield: private func close(_ sender: Any?) { } }

158 Keep Your Generated Header Minimal Use private when possible class MainViewController: UIViewController private var statusfield: private func close(_ sender: Any?) { } }

159 Keep Your Generated Header Minimal Use private when func keyboardwillshow(_: Notification) { }. // Important keyboard setup code here. // NotificationCenter.default.addObserver(self, selector: #selector(keyboardwillshow(_:)), )

160 Keep Your Generated Header Minimal Use private when private func keyboardwillshow(_: Notification) { }. // Important keyboard setup code here. // NotificationCenter.default.addObserver(self, selector: #selector(keyboardwillshow(_:)), )

161 Keep Your Generated Header Minimal Use block-based APIs self.observer = NotificationCenter.default.addObserver( forname: UIKeyboardWillShow, object: nil, queue: nil) { // Important keyboard setup code here. }.

162 Keep Your Generated Header Minimal Migrate to Swift 4

163 Keep Your Generated Header Minimal Turn off Swift Inference

164 Keep Your Generated Header Minimal Turn off Swift Inference

165 Keep Your Bridging Header Minimal // Use this file to import your target's public headers that // you would like to expose to Swift. MyApp-Bridging-Header.h #import "MyBackendAPI.h" #import "MyViewController.h" #import "MyUserDefaultsHelpers.h"

166 Keep Your Bridging Header Minimal // Use this file to import your target's public headers that // you would like to expose to Swift. MyApp-Bridging-Header.h #import "MyBackendAPI.h" #import "MyViewController.h" #import "MyUserDefaultsHelpers.h"

167 Keep Your Bridging Header Minimal #import <UIKit/UIKit.h> #import "MyNetworkManager.h" MyViewController: (nonnull) MyNetworkManager *networkmanager;

168 Keep Your Bridging Header Minimal #import <UIKit/UIKit.h> #import "MyNetworkManager.h" MyViewController: (nonnull) MyNetworkManager *networkmanager;

169 Keep Your Bridging Header Minimal #import <UIKit/UIKit.h> #import "MyNetworkManager.h" MyViewController: (nonnull) MyNetworkManager *networkmanager;

170 Keep Your Bridging Header Minimal Use categories to break up your interface #import <UIKit/UIKit.h> #import MyViewController: UIViewController (nonnull) MyNetworkManager *networkmanager;

171 Keep Your Bridging Header Minimal Use categories to break up your interface #import <UIKit/UIKit.h> #import MyViewController: UIViewController (nonnull) MyNetworkManager *networkmanager; #import MyViewController MyViewController+Internal.h

172 Keep Your Bridging Header Minimal Use categories to break up your interface #import <UIKit/UIKit.h> #import MyViewController: UIViewController (nonnull) MyNetworkManager *networkmanager; #import MyViewController MyViewController+Internal.h

173 Keep Your Bridging Header Minimal Use categories to break up your interface #import MyViewController: UIViewController // #import "MyNetworkManager.h" #import MyViewController (nonnull) MyNetworkManager *networkmanager;

174 Keep Your Bridging Header Minimal Use categories to break up your interface #import MyViewController: UIViewController // #import "MyNetworkManager.h" #import MyViewController (nonnull) MyNetworkManager *networkmanager;

175 Less Content, Fewer Changes, Faster Builds Bridging header Generated header

176 Less Content, Fewer Changes, Faster Builds Bridging header Generated header

177 Less Content, Fewer Changes, Faster Builds Bridging header Generated header

178 Summary

179 Building Faster in Xcode Increasing Build Efficiency Reducing the Work on Rebuilds Parallelizing your build process Declaring script inputs and outputs Measuring your build time Understanding dependencies in Swift Dealing with complex expressions Limiting your Objective-C/Swift interface

180 More Information Building Your App with Xcode Technology Lab 8 Thursday 12:00PM Building Your App with Xcode Technology Lab 8 Friday 3:00PM

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