Ruby 3 Redux

Slide deck from my presentation at RubyDay 2019 in Verona, Italy.

Transcript

2. Ciao!
3. Божидар
4. Bozhidar
5. Bozhidar
6. Bug cool
7. @bbatsov
8. Sofia, Bulgaria Sofia, Bulgaria
11. bbatsov
12. metaredux.com
13. Ruby & Rails style guides
20. Not on Ruby’s Core Team
25. Matz on Ruby
26. Language Maturity
27. The Ruby Community
28. Ruby is not dying
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
37. Rails Mania (2008)
38. Ruby Today
39. Ruby Today
41. Matz’s Retirement
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!
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
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
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
70. Ruby 3.0 is not a single magic release
71. Ruby 3.0 is an idea
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}" }
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)
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
111. 10% average speedup per release
113. MJIT is the biggest hope for Ruby 3x3
114. Guilds
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 • …
138. Real Namespaces (https://bugs.ruby-lang.org/issues/14982)
139. RubyKaigi Updates
141. Felina
142. Grazie! twitter: @bbatsov github: @bbatsov https://metaredux.com https://emacsredux.com RubyDay 2019 Verona, Italy 11.04.2019