内存泄漏脚本

outOfHeap.js

/**
 * 泄露V8 Heap内存
 */

let total = [];

function useMem() {
  let size = 1024 * 1024 * 20; // Per 20MB
  let arr = new Array(size);
  for (let i = 0; i < size; i++) {
    arr[i] = 0;
  }
  return arr;
}

function showMem() {
  let mem = process.memoryUsage();
  let format = (bytes) => (bytes / 1024 / 1024).toFixed(2) + 'MB';
  console.log(`Process: heapTotal ${format(mem.heapTotal)} heapUsed ${format(mem.heapUsed)} rss ${mem.rss}`);
}

for (let i =0; i < 15; i++ ){
  showMem();
  total.push(useMem());
}
showMem();

outOfMemory.js

/**
 * 泄露堆外内存
 */

let total = [];

function useMem() {
  let size = 1024 * 1024 * 20; // Per 20MB
  let buffer = new Buffer(size);
  for (let i = 0; i < size; i++) {
    buffer[i] = 0;
  }
  return buffer;
}

function showMem() {
  let mem = process.memoryUsage();
  let format = (bytes) => (bytes / 1024 / 1024).toFixed(2) + 'MB';
  console.log(`Process: heapTotal ${format(mem.heapTotal)} heapUsed ${format(mem.heapUsed)} rss ${mem.rss}`);
}

for (let i =0; i < 15; i++ ){
  showMem();
  total.push(useMem());
}
showMem();