memory_leak_test.js

'use strict';

/* native Promise is used as default.
 * You can try
 * ```
 * node --expose_gc memory_leak_test.js
 * ```
 *
 * I'm just wondering if `expose_gc` has something problem.
 * When the code is executed a lot of times, execution speed willb be slow down.
 *
 * Also,
 * ```
 * node memory_leak_test.js
 * ```
 *
 * */
// const Promise = require('bluebird');
// const Promise = require('aigle');

let count = 0;

(function exec() {
  const start = Date.now();
  log(`START:[${++count}]`);
  (function () {
    const x = Promise.resolve(1);

    for (let i = 0; i < 1000000; ++i) x.then(() => {});
  })();
  const diff = Date.now() - start;
  log(`AFTER diff:${diff}`);
  setTimeout(() => {
    if (typeof gc === 'function') {
      const start = Date.now();
      gc();
      const diff = Date.now() - start;
      log(`AFTER GC. time:${diff}`);
    }
    setTimeout(exec, 100);
  }, 100);
})();


function log(label) {
    console.log(process.memoryUsage().heapUsed, label);
}