Double Shot #1122

• Asynchronous IO in Rack Middleware - Some ways to tweak Rack apps for more throughput, if you dare to mess around in thread pools.
• Jekyll 1.0 Released - Thanks to some new blood in the project.
• Crafting Rails Applications - Another book updated for Rails 4.
• Xray - Add an overlay to Rails app indicating which piece was rendered by which partial.
• Exploring Elasticsearch - Free online book.
• Stringer - Self-hosted RSS reader without social features.
• Varnish in Five Acts - How to set up and configure this external cache.

Double Shot #1121

• Open Source - Memcache Top - Figure out which are your hot keys.
• Instant Firebug Starter - A full book on using Firebug effectively.
• Future of Firebug Lite - The project is looking for folks to work on it.
• Brainrubyck - A Brainfuck interpreter written in Ruby.
• Turkee - Mechanical Turk integration for Rails projects.
• Rack::Attack - Middleware for throttling requests from abusive clients.

Double Shot #1120

• Interactive mruby - irb running in your browser.
• Rails 4.0: Release Candidate 1 released! - The official announcement.
• Starter App - Using ruby 2, Rails 4, PostgreSQL, RSpec, and Bootstrap.
• Callback logging - Some diagnostic code I whipped up yesterday to add ActiveRecord callbacks to the development log.
• activerecord-callback_notification - This one didn't do quite what I want, but I borrowed some of its code to start from.
• Instrument Anything in Rails 3 - A good introduction to ActiveSupport::Notifications.
• callback_skipper - Short-circuit things in your unit tests.

Double Shot #1119

• The Rails 4 Way - Available now in beta form through Leanpub.
• jet-pack - Boilerplate Sinatra app with Haml, Sass, Coffeescript, Foreman, and other goodies.
• Performance enhancements for Ruby-based stacks in BitNami - They're now preinstalling the Falcon patches and tuning GC by default.
• Feed Wrangler - "A modern, sustainable RSS reader" at $18.99 per year.
• Introducing Trello Business Class! - Good on them for finding a way to let people pay to keep the lights on.

Double Shot #1118

• Skylight - Newly announced performance monitoring service taking waiting list signups.
• Rails 4.0-stable - As expected, 4.0 is entering RC status for RailsConf and master has switched to being 4.1.
• Semaphore - Hosted CI server for Ruby.