Tips for improving server performance: In-depth understanding of the underlying development principles of PHP8

Secrets to improving server performance: In-depth understanding of the underlying development principles of PHP8

Abstract: PHP is a scripting language widely used in web development, and PHP8, as the latest version, There has been a huge improvement in performance. This article will delve into the underlying development principles of PHP8 and introduce some techniques that can improve server performance.

Introduction: With the rapid development of the Internet, server performance has become one of the key factors in website operation. As a mainstream scripting language, PHP's performance optimization can effectively improve the response speed and throughput of web applications. This article will focus on the underlying development principles of PHP8 and share some tips and code examples that can improve server performance.

1. The underlying development principles of PHP8

1. JIT compiler optimization
   PHP8 introduces a new JIT compiler, namely Just-In-Time Compiler. The JIT compiler compiles PHP code into more efficient machine code, improving PHP's execution speed and performance. Developers can get better performance by enabling the JIT compiler in the php.ini file.

Sample code:

// 开启JIT编译器
opcache.enable_file_override=1
opcache.jit_buffer_size=100M
opcache.jit=tracing

2. Introducing new data structures
   PHP8 introduced new data structures, such as the implementation of zval and HashTable has changed. These improvements make memory management more efficient, reducing memory usage and garbage collection time, thus improving server performance.

Sample code:

// 新的zval结构体定义
typedef union _zvalue_value {
    zend_long          lval;
    double             dval;
    zend_refcounted   *counted;
    zend_string       *str;
    zend_array        *arr;
    zend_object       *obj;
    zend_resource     *res;
    zend_reference    *ref;
    zend_ast_ref      *ast;
    zval              *zv;
    void              *ptr;
    zend_class_entry  *ce;
    zend_function     *func;
    struct {
        uint32_t w1;
        uint32_t w2;
    } ww;
} zvalue_value;

typedef struct _zval_struct {
    zvalue_value        value;         /* value */
    zend_uint          refcount__gc;   /* reference count */
    zend_uchar         type;           /* value type */
    zend_uchar         type_flags;
    union {
        uint32_t         next;           /* hash collision chain */
        uint32_t         cache_slot;     /* cache slot (for RECV_INIT) */
        uint32_t         lineno;         /* line number (for ast nodes) */
        uint32_t         num_args;       /* arguments number for EX(This) */
        uint32_t         fe_pos;         /* foreach position  see zend_fe.h */
        uint32_t         fe_iter_idx;    /* foreach iterator index */
    } u;
} zval;

2. Tips and code examples to improve server performance

1. Enable OPcache
   OPcache is a built-in extension of PHP , used to cache PHP's bytecode. Enabling OPcache can reduce the parsing and compilation time of PHP code and improve the execution speed of scripts.

Sample code:

// 开启OPcache
zend_extension=opcache.so
opcache.enable=1
opcache.enable_cli=1

2. Set memory limit
   Set reasonable memory limits in the php.ini file to avoid the program from crashing or running due to insufficient memory slow. According to the actual situation of the server, the memory limit can be configured through the following code.

Sample code:

// 设置内存限制为256M
memory_limit = 256M

3. Avoid frequent IO operations
   Frequent IO operations will greatly reduce the performance of the server. In your code, try to minimize read and write operations on files and databases. You can optimize code and improve server performance by using cache, merging files, reducing database queries, etc.

Sample code:

// 使用缓存读取数据
$data = $cache->get("data");
if (!$data) {
    // 数据不存在时，从数据库读取
    $data = $db->query("SELECT * FROM data")->fetchAll();
    // 将数据存入缓存
    $cache->set("data", $data);
}

4. Optimizing SQL query
   SQL query is one of the common performance bottlenecks in web applications. The performance of SQL queries can be improved by properly designing the database table structure, adding indexes, and optimizing SQL query statements.

Sample code:

// 添加索引
ALTER TABLE table_name ADD INDEX index_name (column_name);

Conclusion: By in-depth understanding of the underlying development principles of PHP8, as well as some server performance optimization techniques and code examples, we can make full use of the new features of PHP8, Improve server performance and responsiveness. By properly configuring the server and optimizing the code, we can provide users with faster and more efficient web services.

References:

1. PHP official documentation: https://www.php.net/
2. Introduction to new features of PHP8: https://wiki.php .net/rfc

(Note: The sample code in this article is for reference only, and the specific implementation can be adjusted according to the actual situation.)

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