worker.startHeapProfile()

• 返回：<Promise>

启动堆分析，然后返回一个 Promise，该 Promise 要么以错误完成，要么返回一个 HeapProfileHandle 对象。此 API 支持 await using 语法。

【Starting a Heap profile then return a Promise that fulfills with an error or an HeapProfileHandle object. This API supports await using syntax.】

const { Worker } = require('node:worker_threads');

const worker = new Worker(`
  const { parentPort } = require('worker_threads');
  parentPort.on('message', () => {});
  `, { eval: true });

worker.on('online', async () => {
  const handle = await worker.startHeapProfile();
  const profile = await handle.stop();
  console.log(profile);
  worker.terminate();
}); 拷贝

await using 示例。

const { Worker } = require('node:worker_threads');

const w = new Worker(`
  const { parentPort } = require('node:worker_threads');
  parentPort.on('message', () => {});
  `, { eval: true });

w.on('online', async () => {
  // Stop profile automatically when return and profile will be discarded
  await using handle = await w.startHeapProfile();
}); 拷贝