swoole如何提高php性能

Swoole4或更高版本拥有高可用性的内置协程，您可以使用完全同步的代码来实现异步性能，PHP代码没有任何额外的关键字，底层会自动进行协程调度。

开发者可以将协程理解为超轻量级的线程, 你可以非常容易地在一个进程中创建成千上万个协程。

并发1万个请求从MySQL读取海量数据仅需要0.2秒

$s = microtime(true);Co\run(function() { for ($c = 100; $c--;) { go(function () { $mysql = new Swoole\Coroutine\MySQL; $mysql->connect(['host' => '127.0.0.1','user' => 'root','password' => 'root','database' => 'test' ]); $statement = $mysql->prepare('SELECT * FROM `user`'); for ($n = 100; $n--;) {$result = $statement->execute();assert(count($result) > 0); } }); }});echo 'use ' . (microtime(true) - $s) . ' s';

混合服务器

你可以在一个事件循环上创建多个服务：TCP，HTTP，Websocket和HTTP2，并且能轻松承载上万请求。

function tcp_pack(string $data): string{ return pack('N', strlen($data)) . $data;}function tcp_unpack(string $data): string{ return substr($data, 4, unpack('N', substr($data, 0, 4))[1]);}$tcp_optiOns= [ 'open_length_check' => true, 'package_length_type' => 'N', 'package_length_offset' => 0, 'package_body_offset' => 4];---------------------------------------------------------------------------------------------------------------$server = new Swoole\WebSocket\Server('127.0.0.1', 9501, SWOOLE_BASE);$server->set(['open_http2_protocol' => true]);// http && http2$server->on('request', function (Swoole\Http\Request $request, Swoole\Http\Response $response) { $response->end('Hello ' . $request->rawcontent());});// websocket$server->on('message', function (Swoole\WebSocket\Server $server, Swoole\WebSocket\Frame $frame) { $server->push($frame->fd, 'Hello ' . $frame->data);});// tcp$tcp_server = $server->listen('127.0.0.1', 9502, SWOOLE_TCP);$tcp_server->set($tcp_options);$tcp_server->on('receive', function (Swoole\Server $server, int $fd, int $reactor_id, string $data) { $server->send($fd, tcp_pack('Hello ' . tcp_unpack($data)));});$server->start();