toshimaru

Codename	Version Build	PHP	Python	Ruby	Perl
Mac OS X Lion	10.7.5 Build 11G63	5.3.15	2.7.1	1.8.7	5.12.3
OS X Mountain Lion	10.8.5 Build 12F2560	5.3.29	2.7.2	1.8.7	5.12.4
OS X Mavericks	10.9.5 Build 13F1112	5.4.43	2.7.5	2.0.0p481	5.16.2
OS X Yosemite	10.10.5 Build 14F2511	5.5.38	2.7.10	2.0.0p481	5.18.2
OS X El Capitan	10.11.6 Build 15G19009	5.5.38	2.7.10	2.0.0p648	5.18.2
macOS Sierra	10.12.5 Build 16F73	5.6.30	2.7.10	2.0.0p648	5.18.2
macOS High Sierra	10.13.4 Build 17F199	7.1.14	2.7.10	2.3.3p222	5.18.2
macOSMojave	10.14.6Build 18G103	7.1.23	2.7.10	2.3.7p456	5.18.4

toshimaru

Class Diagram

classDiagram
    Animal <|-- Duck
    Animal <|-- Fish
    Animal <|-- Zebra
    Animal : +int age
    Animal : +String gender
    Animal: +isMammal()

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Environment

• Ruby 3.1 (ruby:3.1 docker image)
• unicorn 6.1
• Rails 6.1

Workload

• Run unicorn with 4 worker processes
• Request 100 times to unicorn app

toshimaru

github.ref vs github.head_ref in GitHub Actions

Trigger event	pull_request	pull_request_target	push
github.ref	refs/pull/53/merge	refs/heads/main	refs/heads/test/pull_request_target
github.head_ref	test/pull_request_target	test/pull_request_target	-

• main: default branch
• test/pull_request_target: topic branch name
• 53: pull request number

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# Check server process is using jemalloc
# ref. [Japanese] https://tech.studyplus.co.jp/entry/2019/09/09/094140
class AppController < ActionController::Base
  def show
    r = `strings /proc/#{Process.pid}/maps | grep jemalloc`
    render plain: "<h1>#{ENV['LD_PRELOAD'].presence || 'empty'}</h1><pre>#{r}</pre>"
  end
end

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• level-1
  • level-3
  • level-2
  • level-2
    • level-3

---

* level-3

• level-2

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def a
  doc = <<-EOS
    def hello
      puts "Hello World!"
    end
  EOS
end

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require 'benchmark/ips'

Benchmark.ips do |x|
  ary = []
  
  x.report(:a) {
    10_000.times do |num|
      ary << "#{num} #{num * 2} #{num * 3}"
    end
  }

toshimaru

Try webpacker

Try rails/webpacker

Installation

gem 'webpacker', github: "rails/webpacker"

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resource "digitalocean_droplet" "web" {
  image = "ubuntu-16-04-x64"
  name = "web-1"
  region = "sgp1"
  size = "512mb"
  ssh_keys = [12345]

  connection {
    type = "ssh"
    user = "root"