Just playing with Dart's server capabilities

servers_test.dart

import 'dart:async';
import 'dart:io';
import 'dart:isolate';

import 'package:http/http.dart' as http;
// ignore_for_file: unawaited_futures

void main([List<String> args]) {
//  prefix0.main(["15900152"]);
  _buildServers();
//  await _buildRequesters(args?.elementAt(0));
}

////////////////////////////////////////////////////////////////////////////////
void _buildServers() {
  for (int i = 0; i < Platform.numberOfProcessors - 1; i++) {
    Isolate.spawn(_startServer, null);
  }

  _startServer(null);
}

const String _GREET = 'Hello World';

_startServer(arg) async {
  var server = await HttpServer.bind(
    InternetAddress.loopbackIPv4,
    666,
    shared: true,
  );

  print("Iniciado servidor");

  await for (HttpRequest request in server) {
    print("Nova requisição");
    request.response
      ..write(_GREET)
      // ignore: unawaited_futures
      ..close();
  }
}

////////////////////////////////////////////////////////////////////////////////

void _buildRequesters(String address) async {
  int requester = 0;
  for (int i = 0; i < Platform.numberOfProcessors - 1; i++) {
    Isolate.spawn(_performRequest, address);
  }

  await _performRequest(address);
  await Future.delayed(Duration(milliseconds: 2000));
}

_performRequest(String address) async {
  final startTime = DateTime.now();
  int count = 0;

  var client = http.Client();
  while (DateTime.now().difference(startTime) < Duration(seconds: 10)) {
    await client.get(address);
    count++;
  }

  client.close();

  print("Requisições por segundo: ${count / 10}");
}