node/test/sequential/test-gc-http-client.js

'use strict';
// Flags: --expose-gc
// just a simple http server and client.

const common = require('../common');
const onGC = require('../common/ongc');

function serverHandler(req, res) {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello World\n');
}

const http = require('http');
const todo = 300;
let done = 0;
let count = 0;
let countGC = 0;

console.log(`We should do ${todo} requests`);

const server = http.createServer(serverHandler);
server.listen(0, common.mustCall(() => {
  for (let i = 0; i < 15; i++)
    getall();
}));

function getall() {
  if (count === todo)
    return;

  const req = http.get({
    hostname: 'localhost',
    pathname: '/',
    port: server.address().port
  }, cb);

  count++;
  onGC(req, { ongc });

  setImmediate(getall);
}

function cb(res) {
  res.resume();
  done += 1;
}

function ongc() {
  countGC++;
}

setInterval(status, 100).unref();

function status() {
  global.gc();
  console.log('Done: %d/%d', done, todo);
  console.log('Collected: %d/%d', countGC, count);
  if (countGC === todo) server.close();
}