Discourse memo

discourse_memo.md

Discourse

• SamSaffron

  • https://github.com/SamSaffron/fast_blank
  • https://github.com/MiniProfiler
  • https://github.com/rails/rails/pulls?q=is%3Apr+author%3ASamSaffron+is%3Aclosed

• tgxworld

  • rubybench https://rubybench.org/
  • rails/rails#30524
  • https://github.com/rails/rails/pulls?q=is%3Apr+author%3Atgxworld+is%3Aclosed

• Rails 5.1アップグレード discourse/discourse#5122

  • https://meta.discourse.org/t/when-should-discourse-upgrade-to-rails-5/67123
  • https://github.com/discourse/discourse/pull/5122/commits/5be5def217969f8159bfc6d18d9d408af48c89ae
  • パフォーマンスチェック script/bench.rb
    • https://rubybench.org/ で動いている
    • ab使ってる
    • ENV指定
      • グローバルキャッシュ拡張している
      • https://engineering.shopify.com/17489064-tuning-rubys-global-method-cache
      • https://gist.github.com/sonots/71277ef3f9b53fa87862
      • https://github.com/discourse/discourse_docker/blob/master/templates/web.template.yml#L7
    • script/profile_db_generator.rb
      • テスト用データの作成
    • script/memstats.rb
      • /proc/[pid]/smaps の結果見ている
      • https://qiita.com/white_aspara25/items/cfc835006ae356189df3#%E6%96%B9%E6%B3%953-cat-procpidsmaps

• 複数DB

  • discourse/rails_multisite: Multi tenancy for Rails applications

• ネタ

  • https://github.com/discourse/discourse/tree/master/lib/freedom_patches
    • https://github.com/discourse/discourse/blob/master/lib/freedom_patches/fast_pluck.rb
    • https://github.com/discourse/discourse/blob/master/lib/freedom_patches/performance_fixes.rb
      • rails/rails#23394

• https://github.com/discourse/all-the-plugins