服务器性能提升秘诀：深入了解PHP8底层开发原理

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

// 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;

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

// 设置内存限制为256M
memory_limit = 256M

// 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);
}

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