HipHop for PHP: Move Fast

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Haiping Zhao
•8 min read•intermediate•
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Overview

The article discusses HipHop for PHP, a project developed by Facebook to enhance PHP performance by transforming PHP code into optimized C++. It highlights the significant reduction in CPU usage and the benefits of using HipHop for scaling complex web applications.

What You'll Learn

1

How to reduce CPU usage on web servers by implementing HipHop for PHP

2

Why transforming PHP code into C++ can improve performance

3

When to consider using a source code transformer like HipHop for PHP

Prerequisites & Requirements

  • Understanding of PHP and its runtime environment
  • Familiarity with C++ is helpful but not required(optional)

Key Questions Answered

How does HipHop for PHP improve performance for web applications?
HipHop for PHP transforms PHP code into optimized C++, which significantly reduces CPU usage by about fifty percent on average. This transformation allows Facebook to serve over 90% of its web traffic more efficiently, making it easier to scale applications that handle extensive page views.
What are the main components of HipHop for PHP?
HipHop for PHP consists of a source code transformer that converts PHP into C++, a reimplementation of PHP's runtime system, and optimized PHP extensions. This architecture enables better performance while maintaining the ease of use associated with PHP.
What challenges does Facebook face when scaling PHP applications?
Facebook encounters challenges due to the inefficiencies of PHP as a scripting language, especially when handling over 400 billion PHP-based page views monthly. The need for customized experiences for logged-in users complicates scaling efforts, necessitating performance improvements.

Key Statistics & Figures

Reduction in CPU usage
about fifty percent
This reduction is observed on average depending on the page served.
Web traffic served using HipHop
over 90%
This statistic reflects the impact of HipHop on Facebook's web performance six months after deployment.

Technologies & Tools

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Backend
C++
Used for compiling the transformed PHP code to improve performance.
Backend
Php
The original language being optimized through the HipHop transformation process.

Key Actionable Insights

1
Consider implementing HipHop for PHP if your application is experiencing high CPU usage.
By transforming PHP code into optimized C++, you can significantly reduce server load and improve performance, which is crucial for applications with high traffic.
2
Leverage the benefits of static typing in C++ when using HipHop for PHP.
Utilizing static binding for functions and variables can lead to better memory usage and performance, making your application more efficient.
3
Use HPHPi for development to catch bugs without compiling your code.
HPHPi allows developers to run PHP code directly, which can streamline the debugging process and enhance productivity during development.

Common Pitfalls

1
Assuming that rewriting PHP applications in C++ is the only solution for performance issues.
This approach can limit the number of engineers who can work on the codebase, as C++ requires a different skill set. HipHop provides a way to optimize PHP without losing accessibility for developers.

Related Concepts

Performance Optimization Techniques For Web Applications
Php Extensions And Their Role In Enhancing Php Applications
Dynamic Vs. Static Typing In Programming Languages