IOS and macOS performance tuning: Cocoa, Cocoa Touch, Objective-C, and swift

403 Pages·2017·7.971 MB·English

by  Weiher, Marcel

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iOS and macOS™
Performance
Tuning
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iOS and macOS™
Performance
Tuning
Cocoa®, Cocoa Touch®,
Objective-C®, and Swift™
Marcel Weiher
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1 17
Contents at a Glance
Contents vii
AbouttheAuthor xv
Introduction xvii
1 CPU:Principles 1
2 CPU:MeasurementandTools 17
3 CPU:PitfallsandTechniques 41
4 CPUExample:XMLParsing 79
5 Memory:Principles 99
6 Memory:MeasurementandTools 119
7 Memory:PitfallsandTechniques 137
8 MemoryExample:FilterStreams 161
9 Swift 173
10 I/O:Principles 205
11 I/O:MeasurementandTools 215
12 I/O:PitfallsandTechniques 225
13 I/O:Examples 267
14 GraphicsandUI:Principles 295
15 GraphicsandUI:MeasurementandTools 309
16 GraphicsandUI:PitfallsandTechniques 325
17 GraphicsandUI:Examples 343
Index 359
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Contents
AbouttheAuthor xv
Introduction xvii
1 CPU:Principles 1
ASimpleExample 2
ThePerilsof(Micro-)Benchmarking 3
MoreIntegerSumming 5
Swift 6
OtherLanguages 7
ThePowerofHybrids 10
Trends 11
CostofOperations 12
ComputationalComplexity 14
Summary 16
2 CPU:MeasurementandTools 17
Command-LineTools 18
top 18
time 19
sample 20
XcodeGauges 22
Instruments 22
SetupandDataGathering 23
ProfilingOptions 25
BasicAnalysis 27
SourceCode 29
DataMiningI:Focus 32
DataMiningII:Pruning 34
InternalMeasurement 35
Testing 37
Dtrace 38
OptimizationBeyondtheCallofDuty 38
Summary 39
viii Contents
3 CPU:PitfallsandTechniques 41
Representation 41
PrimitiveTypes 42
Strings 45
Objects 48
Accessors 48
PublicAccess 52
ObjectCreationandCaching 52
MutabilityandCaching 53
LazyEvaluation 55
CachingCaveats 56
Pitfall:Generic(Intermediate)Representations 58
ArraysandBulkProcessing 59
Dictionaries 61
Messaging 64
IMPCaching 66
Forwarding 69
UniformityandOptimization 71
Methods 71
Pitfall:CoreFoundation 71
Multicore 72
Threads 73
WorkQueues 74
MatureOptimization 75
4 CPUExample:XMLParsing 79
AnHTMLScanner 80
MappingCallbackstoMessages 83
Objects 85
Objects,Cheaply 87
Evaluation 90
Tune-Ups 93
OptimizingtheWholeWidget:MAX 94
MAXImplementation 96
Summary 97