The document discusses strategies for reducing build times when developing software, including optimizing Xcode settings, enabling whole module optimization, modularizing code into separate targets, and separating user interface code from application logic code. It also references a "love story" metaphor about the challenges of developing software and ways to strengthen relationships through overcoming obstacles like slow build times.

1. The art of developing
more in less time -
how to not get caught
by long build times?
@EliSawic

2. The art of developing
more in less time
@EliSawic

3. How to not get
caught by long build
times?
@EliSawic

4. About me
Eliasz Sawicki
Blog: www.eliaszsawicki.com
Twitter: @EliSawic
www.brightinventions.pl
@EliSawic

5. The beginning...
@EliSawic

6. Objective-C
@EliSawic

7. $wift
@EliSawic

8. Think
@EliSawic

9. A short story
about Love
@EliSawic

10. A short story about Love
1. Friendship
@EliSawic

11. A short story about Love
1. Friendship
2. Love
@EliSawic

12. A short story about Love
1. Friendship
2. Love
3. Doubt
@EliSawic

13. A short story about Love
1. Friendship
2. Love
3. Doubt
4. Betrayal
@EliSawic

14. A short story about Love
1. Friendship
2. Love
3. Doubt
4. Betrayal
5. Starting over again
@EliSawic

15. A short story about Love
1. Friendship
2. Love
3. Doubt
4. Betrayal
5. Starting over again
6. Rebuild the trust
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16. How does it end?
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17. Friendship
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18. Objective-C
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19. The UIKit
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20. Why do we need
UIKit?
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21. Love
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22. Swift
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23. Practice
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24. Tests!
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25. Why do we need
tests?
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26. Why do we
have brakes
in a car??
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27. To stop?
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28. To go faster!
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29. Test
Driven
Development
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30. Doubt
@EliSawic

31. Long
build
times
@EliSawic

32. Slow
feedback
loops
@EliSawic

33. No tests
for you today
@EliSawic

34. Betrayal
@EliSawic

35. React Native
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36. Testing feels
natural
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37. Quick reloading
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38. Not a
silver bullet
@EliSawic

39. Starting over again
@EliSawic

40. What was the
problem?
@EliSawic

41. Long
build
times
@EliSawic

42. Slow
feedback
loop
@EliSawic

43. Rebuild
the trust
@EliSawic

44. Tackling
compilation
times
@EliSawic

45. Type
Inference
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46. Bottleneck
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47. Warnings
-Xfrontend
-warn-long-function-bodies=200
-Xfrontend
-warn-long-expression-type-checking=100
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48. Did not work
in my case
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49. Debug
information
format
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50. With or without you?
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51. Take a look at
your build phases
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52. Build phases
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53. Build phases
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54. Build Active Architecture Only
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55. Xcode settings
defaults write com.apple.Xcode
PBXNumberOfParallelBuildSubtasks 10
defaults write com.apple.dt.Xcode
IDEBuildOperationMaxNumberOfConcurrentCompileTasks 5
@EliSawic

56. Whole
module
optimization
@EliSawic

57. Drastically decreased
time in which the
project compiles
@EliSawic

58. A catch
@EliSawic

59. A trick
@EliSawic

60. Why isn't it
turned on
all the time?
@EliSawic

61. Managing
dependencies
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62. Cocoapods
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63. Carthage
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64. Build tools
@EliSawic

65. Bazel, Buck
@EliSawic

66. Xcode
@EliSawic

67. Xcode
@EliSawic

68. Easy way to decrease
the compilation time
by half
@EliSawic

69. Do not compile
the other half
@EliSawic

70. Modularizing
the code
@EliSawic

71. More things to think
about...
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72. Is it bad?
@EliSawic

73. Nope
@EliSawic

74. How do we split?
@EliSawic

75. Don't bite off more
than you can chew
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76. Step
by
step
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77. What is the code
that I write?
@EliSawic

78. We
write
apps!
@EliSawic

79. Do we really
write apps?
@EliSawic

80. Tests!
@EliSawic

81. Why do we compile
the UI code?
@EliSawic

82. Separating
the UI
@EliSawic

83. Is it bad that we
break up
with UIKit?
@EliSawic

84. Nope
@EliSawic

85. MVC
@EliSawic

86. MVC
@EliSawic

87. MVVM
@EliSawic

88. MVVM
@EliSawic

89. Why would you
remove UIKit?
@EliSawic

90. Can be used
anywhere
@EliSawic

91. Can be tested
anywhere
@EliSawic

92. Passive Views
@EliSawic

93. Logic
@EliSawic

94. Why are they still
together?
@EliSawic

95. Multiple targets
@EliSawic

96. One for UIKit
@EliSawic

97. One for logic
@EliSawic

98. Two for Tests
@EliSawic

99. Better architecture
@EliSawic

100. Speeded up tests
@EliSawic

101. Faster builds
@EliSawic

102. The art of developing
more in less time -
how to not get caught
by long build times?
@EliSawic

103. The art of developing
more in less time
@EliSawic

104. How to not get
caught by long build
times?
@EliSawic

105. Time is not the only
issue
@EliSawic

106. The art of developing
more in less time
@EliSawic

107. It's about the
experience
@EliSawic

108. How does the love
story end?
@EliSawic

109. Stronger
relationship
@EliSawic

110. It depends on you
@EliSawic

111. @EliSawic
www.eliaszsawicki.com
@EliSawic