Must-learn server performance optimization: Master the underlying development principles of PHP8

Must learn server performance optimization: Master the underlying development principles of PHP8

Abstract: PHP is a programming language widely used in Web development, and server performance optimization is Improving the performance of web applications is crucial. This article will introduce the underlying development principles of PHP8 and provide code examples to help readers better understand and master it.

Contents:

1. Introduction
2. Overview of the underlying development principles of PHP8
3. New features of PHP8 and its impact on performance
4. Code Example
5. Summary
6. Introduction
   With the rapid development of the Internet, the performance of Web applications has become more and more important to user experience. As a popular web development language, PHP also plays an important role in server performance optimization. As the latest version, PHP8 has made a series of optimizations and improvements in the underlying development principles. This article will focus on the underlying development principles of PHP8 and provide corresponding code examples.
7. Overview of the underlying development principles of PHP8
   The underlying development principles of PHP8 mainly involve the compiler, interpreter and execution engine. Among them, the compiler converts the PHP source code into intermediate code (opcode), the interpreter interprets the intermediate code into machine code, and the execution engine is responsible for executing the machine code. PHP8 has been optimized in these three aspects to improve performance and efficiency.

In terms of compilers, PHP8 introduces a JIT (Just-In-Time) compiler, which directly compiles part of the hot code (hot code) into machine code, avoiding frequent interpretation and execution processes. , thereby improving performance. In addition, PHP8 also improves the generation and optimization algorithm of AST (Abstract Syntax Tree), speeding up the compilation process.

In terms of the interpreter, PHP8 optimizes the opcode generation and interpretation process, reducing unnecessary calculations and resource waste. In addition, PHP8 also introduces improvements to the type system, providing more accurate type inference and type checking, reducing runtime type conversion and judgment, and improving code execution efficiency.

In terms of execution engine, PHP8 improves the Zend engine and provides more efficient memory management and garbage collection mechanisms. By introducing a new memory allocator and garbage collection strategy, PHP8 achieves faster memory allocation and recycling, reduces memory fragmentation and memory leaks, and improves server stability and performance.

3. New features of PHP8 and their impact on performance
   In addition to the optimization of underlying development principles, PHP8 also introduces many new features and syntax improvements, which also have a certain impact on performance. The following are some noteworthy new features:

1) JIT compiler: The JIT compiler directly compiles hot code into machine code, improving execution speed and efficiency.
2) Type system improvements: The new type system provides more accurate type inference and type checking, reducing the overhead of type conversion and judgment.
3) Improvements in properties and construction methods: PHP8 introduces more flexible property access methods and construction methods, improving code readability and performance.
4) Function call improvements: PHP8 optimizes the function call process, reduces the push and pop operations of functions, and improves execution efficiency.
5) New string functions: PHP8 introduces some new string functions, providing a more efficient string processing method.

4. Code examples
   The following are some code examples showing some of the new features and performance optimization methods of PHP8:

1) JIT compiler example:

<?php
// Enable JIT
ini_set('opcache.jit', '1235');

// Hot code
function hotCode() {
    $sum = 0;
    for ($i = 0; $i < 10000; $i++) {
        $sum += $i;
    }
    return $sum;
}

// Test
$start = microtime(true);
hotCode();
$end = microtime(true);
echo "Execution time: " . ($end - $start) . " seconds";
?>

2) Examples of improved properties and construction methods:

<?php
class User {
    public int $id;
    public string $name;
    
    public function __construct(int $id, string $name) {
        $this->id = $id;
        $this->name = $name;
    }
}

$user = new User(1, 'John');
echo $user->id . ' ' . $user->name;
?>

3) Examples of improved function calls:

<?php
function addNumbers(int $num1, int $num2): int {
    return $num1 + $num2;
}

// Instead of:
$result = addNumbers(2, 3);

// Use:
$result = addNumbers(num1: 2, num2: 3);
?>

5. Summary
   This article introduces the underlying development principles of PHP8 and some new features, as well as corresponding code examples. Mastering the underlying development principles of PHP8 is crucial for server performance optimization. By optimizing the compiler, interpreter and execution engine, and rationally using new features, the performance and efficiency of web applications can be significantly improved. I hope this article can help readers understand and master the underlying development principles of PHP8, so as to optimize server performance.

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