Ruby 3 Redux

Transcript

1. None

2. Ciao!

3. Божидар

4. Bozhidar

5. Bozhidar

6. Bug cool

7. @bbatsov

8. Sofia, Bulgaria Sofia, Bulgaria

9. None
10. None

11. bbatsov

12. metaredux.com

13. Ruby & Rails style guides

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19. None

20. Not on Ruby’s Core Team

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25. Matz on Ruby

26. Language Maturity

27. The Ruby Community

28. Ruby is not dying

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30. None

31. We have to feed the community intellectually. — Matz

32. We have to keep moving forward. — Matz

33. Backwards Compatibility

34. We’re not going to repeat the Python 3 mistakes! —

    Matz

35. Victim of the Hype Cycle

36. None

37. Rails Mania (2008)

38. Ruby Today

39. Ruby Today

40. 2025

41. Matz’s Retirement

42. None

43. Ruby 4

44. Ruby 4x4

45. Ruby 4 is going to be 4 times faster than

    Ruby 3

46. Ruby 4 is going to be 12 times faster than

    Ruby 2

47. Ruby 4 is finally going to be fast enough!

48. None

49. What about Ruby 3?

50. –Matz “We’ll aim to release Ruby 3 for the Olympic

    Games in Tokyo in 2020.”

51. Ruby 3 Goals •Improved programming safety •Faster performance •Better concurrency/parallelism

    support •Better tools

52. Optional static typing?

53. Duck inference?

54. Actors?

55. Stream based model?

56. Ownership based model?

57. Guilds?

58. 3 times faster performance?

59. Smaller Goals •Sane keyword arguments (?!!?!) •Pattern Matching •Deprecation of

    quirky features •Frozen string literals
60. None

61. Ruby 3.0 Redux

62. Dictionary Definitions

63. Ruby

64. noun 1. a precious stone consisting of corundum in colour

    varieties varying from deep crimson or purple to pale rose. 2. a programming language optimised for programmer happiness

65. 3

66. number 1. equivalent to the sum of one and two;

    one more than two; 3 2. A mystical version rarely achieved by most software projects.

67. Redux

68. adjective 1. brought back, revived Emacs era redux 2. (usually

    postpositive) (esp of an artistic work) presented in a new way Apocalypse Now Redux
69. None

70. Ruby 3.0 is not a single magic release

71. Ruby 3.0 is an idea

72. None

73. Ruby follows SemVer

74. Ruby 3 is going to be 3 times faster than

    Ruby 2.0

75. Generational GC (Ruby 2.1)

76. Incremental GC (Ruby 2.2)

77. MJIT (Ruby 2.6)

78. Deprecation of flip-flops (Ruby 2.6)

79. Ruby 2.7

80. Numbered block parameters

81. numbers.map { Math.log2(@1) }

82. foo.bar { @1 + @2 }

83. h = Hash.new { @1[@2] = "Go Fish: #{@2}" }

84. h = Hash.new { @1[@2] = "Go Fish: #{@2}" }

85. None

86. https://bugs.ruby-lang.org/issues/15723

87. Method reference operator

88. [2, 4, 8, 16, 32].map { |n| Math.log2(n) }

89. [2, 4, 8, 16, 32].map(&method(Math.log2))

90. [2, 4, 8, 16, 32].map(&Math.:log2)

91. [2, 4, 8, 16, 32].map { Math.log2($1) }

92. Beginless range

93. Beginless range

94. Beginningless range

95. arr[..3]

96. items.where(price: ..20)

97. None

98. Ruby 3.0 (Current Status)

99. Better Tools

100. RubyGems 3

101. The bundling of Bundler (Ruby 2.6)

102. Gemifying the Standard Library (ongoing progress)

103. Default vs Bundled Gems

104. Default Gems • Bundler • RubyGems • date • irb

     • json • …

105. Bundled Gems • minitest • did_you_mean • rake • …

106. stdgems.org

107. Ruby 3x3

108. Only applies to certain benchmarks

109. Ruby 2.6 is 65% faster than Ruby 2.0

110. None

111. 10% average speedup per release

112. None

113. MJIT is the biggest hope for Ruby 3x3

114. Guilds

115. None
116. None

117. Developed outside the Ruby’s main repo

118. https://github.com/ko1/ruby/tree/guild

119. Work in progress ™

120. Parallel Programming in Ruby 3 with Guilds (http://www.atdot.net/~ko1/activities/2018_rubyconf2018.pdf)

121. Sane Keyword Arguments

122. https://bugs.ruby-lang.org/issues/14183

123. # The following calls pass keyword arguments foo(..., key: val)

     foo(..., **hsh) foo(..., key: val, **hsh)

124. # The following calls pass **normal** arguments foo(..., {key: val})

     foo(..., hsh) foo(..., {key: val, **hsh})

125. Breaking change!!!

126. Migration warning in Ruby 2.7

127. Pattern Matching (https://bugs.ruby-lang.org/issues/14912)

128. What’s not in Ruby 3.0?

129. Optional Static Typing

130. Actors

131. Stream processing

132. Frozen string literals

133. Deprecation of autoload

134. Community Impact

135. Community Contributed Features • UTF-8 • Enumerator • Generational GC

     • Keyword Arguments • JIT • Concurrency

136. Community Contributions • Rake • Bundler • Documentation & Tutorials

     • A ton of amazing libraries • Rails • …
137. None

138. Real Namespaces (https://bugs.ruby-lang.org/issues/14982)

139. RubyKaigi Updates

140. None

141. Felina

142. Grazie! twitter: @bbatsov github: @bbatsov https://metaredux.com https://emacsredux.com RubyDay 2019 Verona,

     Italy 11.04.2019