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
@EliSawic

16. How does it end?
@EliSawic

17. Friendship
@EliSawic

18. Objective-C
@EliSawic

19. The UIKit
@EliSawic

20. Why do we need
UIKit?
@EliSawic

21. Love
@EliSawic

22. Swift
@EliSawic

23. Practice
@EliSawic

24. Tests!
@EliSawic

25. Why do we need
tests?
@EliSawic

26. Why do we
have brakes
in a car??
@EliSawic

27. To stop?
@EliSawic

28. To go faster!
@EliSawic

29. Test
Driven
Development
@EliSawic

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
@EliSawic

36. Testing feels
natural
@EliSawic

37. Quick reloading
@EliSawic

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
@EliSawic

46. Bottleneck
@EliSawic

47. Warnings
-Xfrontend
-warn-long-function-bodies=200
-Xfrontend
-warn-long-expression-type-checking=100
@EliSawic

48. Did not work
in my case
@EliSawic

49. Debug
information
format
@EliSawic

50. With or without you?
@EliSawic

51. Take a look at
your build phases
@EliSawic

52. Build phases
@EliSawic

53. Build phases
@EliSawic

54. Build Active Architecture Only
@EliSawic

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
@EliSawic

62. Cocoapods
@EliSawic

63. Carthage
@EliSawic

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...
@EliSawic

72. Is it bad?
@EliSawic

73. Nope
@EliSawic

74. How do we split?
@EliSawic

75. Don't bite off more
than you can chew
@EliSawic

76. Step
by
step
@EliSawic

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