How can the use of a connection pool improve PHP script performance, particularly in relation to database connections?

Using a connection pool can improve PHP script performance by reusing existing database connections instead of creating new ones for every request. This reduces the overhead of establishing new connections, resulting in faster query execution and improved overall performance. 

// Create a connection pool using PDO
$pdo = new PDO('mysql:host=localhost;dbname=mydatabase', 'username', 'password');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// Use the connection pool to execute queries
$stmt = $pdo->query('SELECT * FROM mytable');
while ($row = $stmt->fetch()) {
    // Process data
}

// Close the connection pool when done
$pdo = null;

Keywords

connection pool PHP script performance database connections optimization scalability

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