Ruby5 #579

https://ruby5.codeschool.com/episodes/621-episode-579-august-25th-2015

• Fixing Slow Request in Rails App
  • how to deal with slow requests in your applications
  • skylight gem
  • hidden loops
  • move out of each or allocate in advance
    • inactivity_threshold = 1.year.ago
    • log "Processed customer".freeze
    • BLACKLIST = ["hacked.com","l33t.com"]
      • BLACKLIST.include?(domain)
  • Ship First, Optimize Later
• Revisiting rails:update
  • bundle exec rake rails:update
  • git diff > ../rails_update.diff
• Magic Numbers in Ruby
  • × THIRTEEN_YEARS = 13 and TWENTY_COMMENTS = 20 would not be sensible constants
• Rails Enum Is a Sharp Knife
  • Specifying enum values with underlying integers
    • enum status: { active: 0,
• RubyKaigi2015
  • Dec. 11th - 13th
  • Yukihiro "Matz" Matsumoto, Motohiro Kosaki

♫ ？