PHP Application Performance: Optimization, Caching, and Profiling

The book "PHP Application Performance" is a comprehensive practical guide for developers who want to learn how to build fast, responsive, and scalable web applications in PHP. Unlike many superficial articles, this book offers a systematic approach to optimization: from writing efficient code to configuring the server environment.

What is this book about?

The author systematically covers all key aspects of PHP application performance:

• Profiling and Benchmarking — how to correctly measure performance, use Xdebug, Blackfire.io, and XHProf to find bottlenecks.
• Code Optimization — efficient algorithms, memory management, reducing CPU load, proper use of loops and functions.
• Caching — implementing opcode caching (OpCache), data caching with Redis/Memcached, HTTP caching, and page caching.
• Database Work — optimizing SQL queries, indexing, using EXPLAIN, reducing query count, connection pooling.
• Architectural Solutions — asynchronous processing, task queues (RabbitMQ, Gearman), microservices, and load balancing.
• Tools and Practices — Composer, autoloading, production monitoring, configuring PHP-FPM and web servers (Nginx, Apache).

Who is this book for?

The publication is aimed at intermediate and advanced PHP developers who already know how to write working code but want to take their projects to a new level of speed and stability. The book will be useful both for developers working on high-load projects (e-commerce, social networks, SaaS) and for those who want to systematize their knowledge in the field of optimization.

What will the reader learn?

• How to properly profile code and interpret the results.
• Which design patterns help improve performance.
• How to configure caching at all levels of the application.
• Why slow database queries are the main enemy of speed and how to deal with them.
• How to avoid typical performance-killing mistakes (memory leaks, non-optimal loops, excessive calls).
• How to prepare an application for traffic growth without rewriting from scratch.

Each chapter contains real code examples, ready-to-use scripts, and checklists for performance auditing. The book is written in a lively language, without excessive academicism — you will be able to immediately apply the knowledge gained in your projects.

If you want your PHP applications to run fast even under high load — this book will become your indispensable assistant.