Swoole / OpenSwoole

Also Known As

TL;DR

Explanation

Swoole adds coroutines, async MySQL/Redis/HTTP clients, WebSocket server, and an event-driven HTTP server as a C extension. Workers stay alive between requests. Non-blocking I/O allows coroutine scheduler to handle many concurrent connections with one worker.

Common Misconception

Why It Matters

Common Mistakes

• Blocking DB calls inside Swoole
• Shared mutable static state between coroutines
• Not using Swoole async clients
• Memory leaks in long-lived workers

Code Examples

$server->on('request', function($req,$resp) {
    $result = $pdo->query('SELECT..'); // Blocks all coroutines!
});

$server->on('request', function($req,$resp) {
    go(function() use($resp) {
        $db = new Swoole\Coroutine\MySQL();
        $result = $db->query('SELECT..'); // Non-blocking
        $resp->end(json_encode($result));
    });
});

References

• ↗ https://openswoole.com/docs

Tags

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