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ToC

The book and screencasts (350+ pages)

Screencasts are only included in the Web Scale package.

An Economist, A Physicist, and a Linguist Walk Into a Bar...
Little's Law (+ screencast)
The Business Case for Performance
Performance Testing (+ screencast)
Profiling (+ screencast)
Memory - How to Measure (+ screencast)
Rack Mini Profiler (+ screencast)
New Relic
Skylight
Optimizing the Front-end
Chrome Timeline (+ screencast)
The Optimal Head Tag (+ screencast)
Resource Hints (+ screencast)
Turbolinks and View-Over-The-Wire
Webfonts (+ screencast)
HTTP/2 (+ screencast)
JavaScript
HTTP Caching (+ screencast)
Memory Bloat (+ screencast)
Memory Leaks (+ screencast)
ActiveRecord
Background Jobs
Caching
Slimming Down Your Framework (+ screencast)
Exceptions as Flow Control
Webserver Choice
Idioms - writing faster Ruby
Streaming
ActionCable
CDNs (+ screencast)
Databases
JRuby
Memory Allocators
SSL (+ screencast)
Easy Mode Stack - "What stack should I choose?"
The Complete Checklist - a 75+ item checklist for Ruby/Rails apps.

Recorded Q&A sessions

Partials
Rack-mini-profiler
Turbolinks
History of the Ruby GC
Debugging slow SQL
Russian Doll Caching
Gems to Make Your App Faster
Step-by-Step Perf Diagnosis

Interviews (~1 hr each)

DHH (this one is available for free here)
Richard Schneeman (of Heroku)
Mike Perham (Sidekiq)
Sean Griffin (ActiveRecord maintainer)
Eileen Uchitelle (Basecamp)
Sam Saffron (Discourse)
Evan Phoenix (Puma)

There's other stuff included too - like hands-on labs and a private Slack channel. Read all about it.

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