memtest.js

function allocateMemory(size) {
  // Simulate allocation of bytes
  const numbers = size / 8;
  const arr = [];
  arr.length = numbers;
  for (let i = 0; i < numbers; i++) {
    arr[i] = i;
  }
  return arr;
}
const memoryLeakAllocations = [];
 
const field = "heapUsed";
const allocationStep = 10000 * 1024; // 10MB
 
const TIME_INTERVAL_IN_MSEC = 40;
 
setInterval(() => {
  const allocation = allocateMemory(allocationStep);
 
  memoryLeakAllocations.push(allocation);
 
  const mu = process.memoryUsage();
  // # bytes / KB / MB / GB
  const gbNow = mu[field] / 1024 / 1024 / 1024;
  const gbRounded = Math.round(gbNow * 100) / 100;
 
  console.log(`Heap allocated ${gbRounded} GB`);
}, TIME_INTERVAL_IN_MSEC);