Compare express.js with amphp/http-server

server.js

var express = require('express');
var app = express();

app.get('/', function (req, res) {
  res.send('Hello World!');
});

app.listen(3000, function () {
  console.log('Running on port 3000.');
});

server1.php

<?php
require __DIR__ . '/vendor/autoload.php';

use Amp\ByteStream\ResourceOutputStream;
use Amp\Http\Server\Request;
use Amp\Http\Server\RequestHandler\CallableRequestHandler;
use Amp\Http\Server\Response;
use Amp\Http\Server\Server;
use Amp\Http\Status;
use Amp\Log\ConsoleFormatter;
use Amp\Log\StreamHandler;
use Amp\Socket;
use Monolog\Logger;

// Run this script, then visit http://localhost:3000/ in your browser.
Amp\Loop::run(function () {
    $servers = [
        Socket\listen("0.0.0.0:3000"),
        Socket\listen("[::]:3000"),
    ];

    $server = new Server($servers, new CallableRequestHandler(function (Request $request) {
        return new Response(Status::OK, [
            "content-type" => "text/plain; charset=utf-8"
        ], "Hello, World!");
    }));
    yield $server->start();
    // Stop the server 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();
    });
});

server2.php

<?php
require __DIR__ . '/vendor/autoload.php';

use Amp\ByteStream\ResourceOutputStream;
use Amp\Http\Server\Request;
use Amp\Http\Server\RequestHandler\CallableRequestHandler;
use Amp\Http\Server\Response;
use Amp\Http\Server\Server;
use Amp\Http\Status;
use Amp\Log\ConsoleFormatter;
use Amp\Log\StreamHandler;
use Amp\Socket;
use Monolog\Logger;

// Run this script, then visit http://localhost:3000/ in your browser.
Amp\Loop::run(function () {
    $servers = [
        Socket\listen("0.0.0.0:3000"),
        Socket\listen("[::]:3000"),
    ];
    $logHandler = new StreamHandler(new ResourceOutputStream(\STDOUT));
    $logHandler->setFormatter(new ConsoleFormatter);
    $logger = new Logger('server');
    $logger->pushHandler($logHandler);
    $server = new Server($servers, new CallableRequestHandler(function (Request $request) {
        return new Response(Status::OK, [
            "content-type" => "text/plain; charset=utf-8"
        ], "Hello, World!");
    }), $logger);
    yield $server->start();
    // Stop the server 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();
    });
});