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hphp/doc/hands-on/index.md

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Welcome to HHVM! This section of our documentation is a hands-on guide for people who want to learn about compiler and runtime internals. The goal is to work through making, testing, and measuring a sample optimization to our compiler. You'll make the most out of this guide if you work through the exercises as you read it.

Lesson 0: Building and running HHVM

Lesson 1: Understanding Hack runtime types

Lesson 2: Understanding Hack bytecode

Lesson 3: Refcounting and value types

Lesson 4: Making an IR optimization