Benchmarks

amp.php

<?php
require 'vendor/autoload.php';
use Amp\Http\Server\RequestHandler\CallableRequestHandler;
use Amp\Http\Server\Server;
use Amp\Http\Server\Request;
use Amp\Http\Server\Response;
use Amp\Http\Status;
use Amp\Socket;
use Psr\Log\NullLogger;

// Run this script, then visit http://localhost:1337/ in your browser.

Amp\Loop::run(function () {
    $sockets = [
        Socket\listen("0.0.0.0:1337"),
        Socket\listen("[::]:1337"),
    ];
    
    $server = new Server($sockets, new CallableRequestHandler(function (Request $request) {
        return new Response(Status::OK, [
            "content-type" => "text/plain; charset=utf-8"
        ], json_encode([
            'code' => 'ok',
            'error' => false,
            'payload' => 'Hello World'
          ]));
    }), new NullLogger);

    yield $server->start();

    // Stop the server gracefully when SIGINT is received.
    // This is technically optional, but it is best to call Server::stop().
    Amp\Loop::onSignal(SIGINT, function (string $watcherId) use ($server) {
        Amp\Loop::cancel($watcherId);
        yield $server->stop();
    });
});

node.js

var http = require('http');

var data = {
  'code': 'ok',
  'error': false,
  'payload': 'Hello World'
};

var app = function (req, res) {
  res.writeHead(200, {
    'Content-Type': 'application/json'
  });
  res.end(JSON.stringify(data));
};

var server = http.createServer(app);

server.listen(1337, function() {
  console.log("Server running at http://127.0.0.1:1337");
});

Output.asc

wrk -t4 -c400 -d10s http://127.0.0.1:1337/

ReactPHP:
Running 10s test @ http://127.0.0.1:1337/
  4 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   129.98ms  234.70ms   1.94s    85.24%
    Req/Sec   843.63      1.26k    5.10k    81.08%
  18447 requests in 10.42s, 2.13MB read
  Socket errors: connect 0, read 18447, write 0, timeout 10
Requests/sec:   1770.11
Transfer/sec:    209.16KB

Node:
Running 10s test @ http://127.0.0.1:1337/
  4 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    20.58ms    4.38ms 272.51ms   94.55%
    Req/Sec     4.78k   614.18     5.41k    93.50%
  190151 requests in 10.03s, 36.63MB read
Requests/sec:  18955.65
Transfer/sec:      3.65MB

Swoole:
Running 10s test @ http://127.0.0.1:1337/
  4 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     1.68ms  845.37us  12.61ms   67.84%
    Req/Sec    59.70k     5.63k   76.41k    70.75%
  2377018 requests in 10.03s, 478.32MB read
Requests/sec: 237012.64
Transfer/sec:     47.69MB

AmPHP:
Running 10s test @ http://127.0.0.1:1337/
  4 threads and 400 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    55.22ms  172.36ms   2.00s    96.60%
    Req/Sec     3.43k   448.58     4.78k    81.25%
  136495 requests in 10.04s, 28.12MB read
  Socket errors: connect 0, read 0, write 0, timeout 70
Requests/sec:  13599.16
Transfer/sec:      2.80MB

react.php

<?php
require 'vendor/autoload.php';
$loop = new React\EventLoop\ExtEventLoop();
$socket = new React\Socket\Server('127.0.0.1:1337', $loop);
$socket->on('connection', function (React\Socket\ConnectionInterface $connection) {
    $connection->once('data', function () use ($connection) {
        $body = json_encode([
            'code' => 'ok',
            'error' => false,
            'payload' => 'Hello World'
          ]);
        $connection->end("HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nConnection: close\r\n\r\n" . $body);
    });
});
echo "Server running at http://127.0.0.1:1337\n";
$loop->run();

swoole.php

<?php
$http = new swoole_http_server("127.0.0.1", 1337, SWOOLE_BASE);

$http->set([
    'worker_num' => 4,
]);

$data = [
  'code' => 'ok',
  'error' => false,
  'payload' => 'Hello World'
];

$http->on('request', function ($request, swoole_http_response $response)  use($data)  {
    $response->header('Content-Type', 'application/json');   
    $response->end(json_encode($data));
});

$http->start();