Postgres tips for Rails developers
This week at RailsConf, we found ourselves sharing a lot of tips for using PostgreSQL with Rails. We thought it might be worthwhile to write up many of these and share more broadly. Here you’ll find some tips that will help you in debugging and improving performance of your database from your Rails app. And now, on to the code. Manage long running queries with statement time-outs Long running quer
Rodrigo Rosenfeld Rosas - Ruby on Rails: the Bad and Good parts
Wed, 03 May 2017 17:40:00 +0000 (Updated at Thu, 04 May 2017 20:00:00 +0000) In my previous article, I had a hard time trying to explain why I wanted to replace Rails with something else in the first place. This article is my attempt to write more specifically about what I dislike in Rails for the purpose of the single page application we maintain. In summary, in the previous article I explained t
Improving capistrano deployment performance - Engineering at Avvo
Measure it First you have to find out what is slow before you can fix it. capistrano-measure is a project that can help you do that. Your output will be something like this: I, [2017-04-27T11:40:30.585704 #11159] INFO -- : ============================================================ I, [2017-04-27T11:40:30.586152 #11159] INFO -- : Performance Report I, [2017-04-27T11:40:30.586189 #11159] INFO -- :
Introducing a faster BBC News front page
Web performance is something I care deeply about both as a developer whose work affects millions of people around the world, and as a user who often accesses the web on slow & unreliable connections. I have regularly and loudly complained that the BBC News website is unnecessarily slow, so when I was given the opportunity to help rebuild one of the most visited pages of BBC News—the front page—I j
requireとrequire_relativeの違いとは？ - (ﾟ∀ﾟ)o彡 sasata299's blog
2014年10月28日10:57 Ruby requireとrequire_relativeの違いとは？ 先日、require_relativeっていうのを見かけて、これなんだろうと思って調べました！どうもRuby1.9.2から導入されたモジュールみたいですね。 そもそも、Ruby1.9.2以降とそれより前のバージョンとでは、$LOAD_PATHの扱いに違いがあります。例えば、Ruby1.8.7では$LOAD_PATHにはカレントディレクトリも含まれます。 $ rbenv shell 1.8.7-p375 $ ruby -e 'puts $LOAD_PATH' /Users/sasata299/.rbenv/versions/1.8.7-p375/lib/ruby/site_ruby/1.8 /Users/sasata299/.rbenv/versions/1.8.7-p375/lib/r
ActiveRecord4, Rails4のinverse_ofについて理解したメモ - Shoken Startup Blog
MongoDB(mongoid)でも使える。 inverse_ofとは inverse_ofを指定したリレーションのある2つのモデルでは、双方から同一のインスタンスを参照できるようになる。両者ともメモリ上で同一のインスタンスとして扱われる。 逆に、inverse_ofの設定が無いと同一として扱われず、一方からの変更がもう一方から参照しても変更されていない。 具体例 UserモデルとMenuモデルが1対多でリレーションしている状況を考える。Userが複数のMenuを登録できるWebサービスのイメージ。 ソースコード class User < ActiveRecord::Base has_many :menus end class Menu < ActiveRecord::Base belongs_to :user end inverse_ofが無かったら Userのフィールドnameの変更が
gRPC-Web: Moving past REST+JSON towards type-safe Web APIs - Improbable
Posted on 26 April 2017 gRPC-Web: Moving past REST+JSON towards type-safe Web APIs Michal Witkowski is Improbable’s Principal Tech Lead on SpatialOS and Marcus Longmuir is the Tech Lead of Improbable’s Webtools Team. REST+JSON is the de-facto standard way of building interactions between Web Apps and API servers. However, once you get past the initial ease of the prototyping phase, it shows proble
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GitHub - Shopify/bootsnap: Boot large Ruby/Rails apps faster
GitHub - keon/algorithms: Minimal examples of data structures and algorithms in Python
