Real server optimization: revealing the underlying development principles of PHP8

Real server optimization: Revealing the underlying development principles of PHP8

Introduction:

PHP is a widely used server-side scripting language for Dynamic web development. With the continuous development of Internet business, server performance and response speed have become increasingly important. Therefore, the optimization and performance improvement of PHP have become the focus of developers. As the latest version, PHP8 adopts a series of optimization strategies and technologies in the underlying development. This article will reveal the underlying development principles of PHP8 to help readers better understand and apply these technologies to achieve true server optimization.

1. Introduction of JIT compiler

PHP8 introduces the JIT (Just-In-Time) compiler, which is a major breakthrough for the language. The JIT compiler can dynamically compile PHP source code into machine code for direct execution, eliminating the need for interpretation and execution. This way, PHP can achieve better performance when executing.

The JIT compiler adopts a Trace-based method to optimize performance and reduce unnecessary interpretation and execution overhead by tracking code hotspots (frequently executed code segments). This compilation method greatly improves the execution speed of PHP, especially when dealing with frequent operations such as loops and function calls.

2. Optimized AST

AST (Abstract Syntax Tree) is an intermediate representation of PHP source code. PHP8 optimizes AST and improves the efficiency of compilation and execution.

First of all, PHP8 reduces the memory footprint of AST by using more compact data structures. In this way, PHP can use memory resources more efficiently when parsing and analyzing source code, improving execution efficiency.

Secondly, PHP8 introduces a new Zephir language for writing the underlying code of extension modules. The characteristic of this language is that it can convert AST into C language code, further improving execution performance. By converting AST into C code, you can bypass PHP's interpretation and execution link and directly call C code, thereby reducing performance loss and speeding up execution.

3. Improved GC algorithm

Garbage Collection is an automatic memory management mechanism used to release memory space that is no longer used. PHP8 improves the GC algorithm and improves the efficiency of garbage collection.

PHP8 uses a generational garbage collection algorithm to divide memory objects into different generations according to their life cycles. In this way, only a small amount of garbage collection operations are required for objects with long life cycles, which improves efficiency. In addition, PHP8 also introduces an incremental garbage collection algorithm, which disperses garbage collection operations into multiple time slices, reducing the impact of GC on execution performance.

4. Optimized data structures and algorithms

PHP8 has optimized some core data structures and algorithms in the underlying development to improve performance and efficiency. For example, PHP8 uses hash tables as the underlying implementation of arrays instead of traditional ordered arrays. This change greatly improves the efficiency of array insertion, query, and deletion operations and saves server resources.

In addition, PHP8 also optimizes common operations such as string processing and regular expression matching, and adopts more efficient algorithms and data structures. These optimization measures can significantly improve the execution speed of PHP scripts in server-side applications and optimize the overall performance of the server.

5. Multi-thread support

PHP has always been a single-threaded execution language and cannot fully utilize the computing power of multi-core CPUs. However, PHP8 introduced multi-threading support in the underlying development to achieve true concurrent execution.

PHP8 adopts a lightweight thread model that can execute multiple threads at the same time, improving the concurrent processing capabilities of the server. With the support of multi-core CPUs, PHP8 can achieve more efficient parallel computing, significantly improving the server's response speed and processing capabilities.

Conclusion:

By revealing the underlying development principles of PHP8, we can better understand the optimization strategies and technologies of PHP8. Technologies such as JIT compiler, optimized AST, improved GC algorithm, optimized data structures and algorithms, and multi-thread support have brought better performance and efficiency to PHP8. In actual applications, server optimization can be performed on these optimization points according to specific business needs, thereby achieving faster and more efficient PHP applications.

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