node.js --trace-gc 输出的含义是什么

node.js --trace-gc 输出的含义

javascript
function createArray(length) {
  let array = new Array(length);
  for (let i = 0; i < length; i++) {
    array[i] = i;
  }
  return array;
}
function processArray(array) {
  let sum = 0;
  for (let i = 0; i < array.length; i++) {
    sum += array[i];
  }
  return sum;
}
function main() {
  console.log('开始运行');
  console.trace();
  
  let array1 = createArray(10000000);
  console.log('创建数组1');
  console.trace();
  
  let array2 = createArray(5000000);
  console.log('创建数组2');
  console.trace();
  
  let sum1 = processArray(array1);
  console.log('处理数组1');
  console.trace();
  
  let sum2 = processArray(array2);
  console.log('处理数组2');
  console.trace();
  
  console.log('运行结束');
}
main();