After A Decade: Still a Rubyist - Red Dot Ruby Conference 2016

Ruby isn't new or hip, but that's ok. It's a safe choice, which means we're now legacy and powering larger data systems, which is a good thing(™). This hardly means Ruby is boring. It's great to learn the next new thing (and you should!), but that doesn't mean you can't continue to build your next project in Ruby. The community is working on some initiatives to pave a bright future for Ruby. In this talk, we're going to touch on three specific projects that are interesting and applicable to the everyday Rubyist.

Reactive Programming think Node.js (jruby/ratpack)
Ruby Performance in modern APIs and Web Apps (helix/rust)
Scripting / CLI tools in Ruby (mruby/mruby-cli)

Even after 10 years, I've never been more excited to build things in Ruby!

Learn More Links:

* https://hrku.com/jrubrat
* http://blog.skylight.io/introducing-helix/
* http://mruby-cli.org

Video: https://engineers.sg/video/closing-keynote-after-a-decade-still-a-rubyist-reddotrubyconf-2016--824

Transcript

1. After A Decade Still a Rubyist
2. Terence Lee @hone02
3. Austin, TX
7. #soloselfie
8. #rubykaraoke
9. @aspleenic
10. #rubykaraoke details 10pm Tonight (after the after party) K BOX @ Chinatown $38++ pax 211 New Bridge Road #04-01 Lucky Chinatown Singapore 059432
11. Red Dot Ruby Conference in Review
12. 10 Years of Ruby SG
13. There are two hard things in computer science: cache invalidation, naming things, and off-by-one errors.
14. There are two hard things in computer science: cache invalidation, naming things, and off-by-one errors.
15. I'll just use this regular expression: /[\s,]*(~@|[\[\]{}()'`~^@]|"(?:\\.|[^\\"])*"|;.*|[^\s\[\]{}('"`,;)]*)/
16. Ruby has many secrets. #1: Predefined Variables #2: ?, => "," #3: [1,2,3]*? => "1,2,3" #4: "Hello"[/[A-Z]/] => "H"
18. The "fish" in our industry is the ability to think abstractly and knowing what to do when the abstraction eventually leaks.
19. Probably your API is fast enough
20. Google Lies. People don't leave because of managers
21. Unlike documentation, running Ruby (language) tests is easy. It's only 6 steps! $ git clone https://github.com/ruby/ruby $ cd ruby $ autoconf $ ./configure --disable-install-doc $ make -j $ make check
22. If there are no tests, there'd be no slow tests
23. Future authorization systems should be less dependent on the developer and give more power to the users
24. A change positive architecture provides maintainable, sustainable, and joyful development
25. Always Be Simulating
27. Daru
28. Currencies are tricky. Salaries
29. There are two hard things in computer science: cache invalidation, naming things, and off-by-one errors.
30. IoT makes a lot of sense
31. An existing system being used reflects its real needs.
32. Three years on a cold stone will make the stone warm
33. Don't believe in Stars
34. explainshell.com
35. Declarative Paradigms can make it easier to reason about your app
36. In theory, theory and practice are the same...
37. Regular Expressions: Now you have two problems
38. My Ruby Story
42. Started Learning Ruby in 2006
44. After 10 years, Why Ruby?
45. Community
46. Other Languages
47. Ruby isn't cool anymore
48. People Leaving Ruby blog.jaredfriedman.com/2015/09/15/why-i-wouldnt-use-rails-for-a-new- company/
49. Mature Ecosystem
50. "Bro, I wrote a script in Ruby Today. It felt freeing." -Yehuda Katz
51. Edges of Ruby
52. Fast is a feature
53. Ruby 3x3
54. Ruby 10% Year over Year
55. Thanks Ruby Core Team, AppFolio, Heroku <3
56. "[Node.js] ran really efficiently in terms of its I/O utilization, and its memory utilization is really low […] You’re not really CPU-bound anymore. You’re memory bound and I/O bound." Kiran Prasad senior director of mobile engineering LinkedIn www.datacenterknowledge.com/archives/2013/12/04/paypal-groupon-go-node-js/
57. Node.js is great at building efficient web services with lots of I/O
58. ratpack.io
59. Ratpack is a micro-framework for building modern HTTP applications with reactive principles in mind. It is built on the highly performant and efficient Netty event-driven networking engine.
60. What's "reactive" actually mean?
61. applying backpressure from a client non-blocking communication
62. non-blocking communication
63. By leveraging powerful concurrency libraries from the JVM, ratpack is built from the ground up to support non-blocking IO.
64. ratpack hello world RatpackServer.start do |b| b.handlers do |chain| chain.get do |ctx| ctx.render("Hello World!") end end end
65. ratpack streaming RatpackServer.start do |b| b.handlers do |chain| chain.get("stream") do |ctx| publisher = Streams.periodically(ctx, Duration.ofMillis(1000)) do |i| i < 10 ? i.to_s : nil end ctx.render(ResponseChunks.stringChunks(publisher)) end end end
66. ratpack IO code RatpackServer.start do |b| b.handlers do |chain| chain.get("io") do |ctx| Blocking.get do sleep 0.3 end.then do ctx.render("Got response from fake db!") end end end end
67. Faban Benchmarks
68. Learn more: hrku.co/jrubrat
69. CPU Bound
70. In 5 samples, ActiveSupport#blank? makes up 3.88% of total CPU time github.com/rails/rails/pull/9958
71. ActiveSupport's String#blank? class String # A string is blank if it's empty or contains whitespaces only: # # ''.blank? # => true # ' '.blank? # => true # "\t\n\r".blank? # => true # ' blah '.blank? # => false # # Unicode whitespace is supported: # # "\u00a0".blank? # => true # def blank? /\A[[:space:]]*\z/ === self end end
72. CPU Bound -> Native Extensions
73. fast_blank static VALUE rb_str_blank(VALUE str) { rb_encoding *enc; char *s, *e; enc = STR_ENC_GET(str); s = RSTRING_PTR(str); if (!s || RSTRING_LEN(str) == 0) return Qtrue; e = RSTRING_END(str); while (s < e) { int n; unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc); switch (cc) { case 9: case 0xa: case 0xb: case 0xc: case 0xd: case 0x20: case 0x85: case 0xa0: case 0x1680: case 0x2000: case 0x2001: case 0x2002: case 0x2003: case 0x2004: case 0x2005: case 0x2006: case 0x2007: case 0x2008: case 0x2009: case 0x200a: case 0x2028: case 0x2029: case 0x202f: case 0x205f: case 0x3000: /* found */ break; default: return Qfalse; } s += n; } return Qtrue; }
74. Up to 20X faster 5% improvement on macro benchmarks
75. Becoming good at writing safe C is hard
76. issues even for seasoned maintainers C Extensions are Hard
78. Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.
79. If you have successfully compiled a Rust program, it will not segfault at runtime.
80. Zero-Cost Abstractions blog.rust-lang.org/2015/05/11/traits.html
81. blank.rs pub extern "C" fn fast_blank(buf: Buf) -> bool { buf.as_slice().chars().all(|c| c.is_whitespace()) }
82. Benchmarks (Higher is Better) =========== Test String Length: 6 =========== Rust 11.043M (± 3.5%) i/s - 54.744M C 10.583M (± 8.5%) i/s - 52.464M Ruby 964.469k (±27.6%) i/s - 4.390M
84. helix
86. Helix is a bridge between Ruby and Rust. It allows you to write Ruby classes in Rust without having to write the glue code yourself.
87. fast_blank in helix #[macro_use] extern crate helix; declare_types! { reopen class RubyString { def is_blank(self) -> bool { self.chars().all(|c| c.is_whitespace()) } } }
88. TurboRails?
89. Learn more: blog.skylight.io/introducing-helix/
90. Packaging in Ruby
91. story of the heroku toolbelt
92. gem install heroku
93. Requires Ruby to be installed
94. Can't guarantee same version of ruby locally
96. Packaging was a nightmare
97. hk
99. require in ruby is slow
102. No Great Packaging Story in Ruby
103. mruby-cli
104. mruby mruby is the lightweight implementation of the Ruby language complying with part of the ISO standard. mruby can be linked and embedded within your application.
105. writing in ruby
106. mrblib ├── [4.0K] mrblib │ ├── [4.0K] mruby-cli │ │ ├── [ 697] cli.rb │ │ ├── [ 424] help.rb │ │ ├── [ 403] option.rb │ │ ├── [1022] options.rb │ │ ├── [8.0K] setup.rb │ │ ├── [ 238] util.rb │ │ └── [ 206] version.rb │ └── [ 53] mruby-cli.rb
107. fast is a feature
108. MRI # hello_world.rb puts 'Hello World' $ time ruby hello.rb Hello World real 0m0.041s user 0m0.028s sys 0m0.008s
109. MRI # hello_world.rb puts 'Hello World' $ time ruby hello.rb Hello World real 0m0.041s user 0m0.028s sys 0m0.008s # mrblib/hello.rb def __main__(argv) puts "Hello World" end $ time mruby/build/host/bin/hello Hello World real 0m0.003s user 0m0.000s sys 0m0.000s mruby-cli
110. MRI # hello_world.rb puts 'Hello World' $ time ruby hello.rb Hello World real 0m0.041s user 0m0.028s sys 0m0.008s # mrblib/hello.rb def __main__(argv) puts "Hello World" end $ time mruby/build/host/bin/hello Hello World real 0m0.003s user 0m0.000s sys 0m0.000s mruby-cli
111. No require
112. a single binary for every major platform
113. docker-compose run compile Linux OS X Windows
114. Size Matters $ ls -nlh mruby-cli | awk '{print $5}' 421K
115. simple setup
116. Docker FROM hone/mruby-cli
117. Hello World Example $ mruby-cli --setup hello
118. Hello World Example $ mruby-cli --setup hello $ cd hello
119. Hello World Example $ mruby-cli --setup hello $ cd hello $ docker-compose run compile
120. Hello World Example $ mruby-cli --setup hello $ cd hello $ docker-compose run compile $ docker-compose run shell # mruby/build/host/bin/hello
121. Hello World Example $ mruby-cli --setup hello $ cd hello $ docker-compose run compile $ docker-compose run shell # mruby/build/host/bin/hello Hello World
122. Hello World Example $ mruby/bin/mruby-cli --setup hello create .gitignore create mrbgem.rake create build_config.rb create Rakefile create Dockerfile create docker-compose.yml create tools/ create tools/hello/ create tools/hello/hello.c create mrblib/ create mrblib/hello.rb create mrblib/hello/ create mrblib/hello/version.rb create bintest/ create bintest/hello.rb create test/ create test/test_hello.rb
123. edit mrblib/hello.rb # mrblib/hello.rb def __main__(argv) puts "Hello World" end
124. Learn more: mruby-cli.org
126. Even after 10 years, I've never been more excited to build things in Ruby.
128. Let's keep writing the Ruby we love without the fear we'll hit a wall.
129. Thank You Red Dot Ruby @hone02