Projects That Are Making Blazing Fast Ruby a Reality http://www.sitepoint.com/projects-that-are-making-blazing-fast-ruby-a-reality/

Is Ruby 2.3 Faster? Date Parsing Performance http://ruby-performance-book.com/blog/2016/02/is-ruby-2-3-faster-date-parsing-performance.html

Is Ruby 2.3 Faster? Rails ERB Template Rendering Performance http://ruby-performance-book.com/blog/2016/02/is-ruby-2-3-faster-rails-erb-template-rendering-performance.html

Ruby Debugging Magic Cheat Sheet http://www.schneems.com/2016/01/25/ruby-debugging-magic-cheat-sheet.html

I am a puts debuggerer http://tenderlovemaking.com/2016/02/05/i-am-a-puts-debuggerer.html

Kill Your Dependencies http://www.mikeperham.com/2016/02/09/kill-your-dependencies/

Caching result sets and collection in Rails 5 http://blog.bigbinary.com/2016/02/02/activerecord-relation-cache-key.html

Rails 5 does not halt callback chain when false is returned http://blog.bigbinary.com/2016/02/13/rails-5-does-not-halt-callback-chain-when-false-is-returned.html

Rails 5 only supports PostgreSQL 9.1+ https://github.com/rails/rails/pull/23434

Configuring bundler using bundle config http://blog.bigbinary.com/2016/02/09/configuring-bundler-using-bundle-config.html

Action Cable and WebSockets: An in-Depth Tutorial http://www.sitepoint.com/action-cable-and-websockets-an-in-depth-tutorial/

RSpec 3.5.0.beta1 has been released! http://rspec.info/blog/2016/02/rspec-3-5-0-beta1-has-been-released/

Stubs, Mocks and Spies in RSpec https://about.futurelearn.com/blog/stubs-mocks-spies-rspec/

Ember v2.3.1 Released (also v2.4.0-beta.2) https://github.com/emberjs/ember.js/releases/tag/v2.3.1 https://github.com/emberjs/ember.js/releases/tag/v2.4.0-beta.2

Understanding JavaScript’s async await https://ponyfoo.com/articles/understanding-javascript-async-await

CSS Variables: Why Should You Care? https://developers.google.com/web/updates/2016/02/css-variables-why-should-you-care

Chrome 49 Beta: CSS custom properties, background sync with service workers, and new ES2015 features https://blog.chromium.org/2016/02/chrome-49-beta-css-custom-properties.html

Developer Edition 46 — More memory tooling, improved @media sidebar and more https://hacks.mozilla.org/2016/02/developer-edition-46-more-memory-tooling-improved-media-sidebar-and-more/

Microsoft Security Bulletin Summary for December 2015 https://technet.microsoft.com/library/security/ms16-feb

The future of loading CSS https://jakearchibald.com/2016/link-in-body/

HTTP/2 Implementation Status https://www.mnot.net/blog/2015/06/15/http2_implementation_status

Creating a Document-Store Hybrid in Postgres 9.5 https://blog.andyet.com/2016/02/04/postgres-9.5-document-store-hybrid/

Performance Tuning Queries in PostgreSQL http://www.geekytidbits.com/performance-tuning-postgres/