worker.startHeapProfile([options])

• options <Object>
  • sampleInterval <number> 平均采样间隔（以字节为单位）。 默认值： 524288（512 KiB）。
  • stackDepth <integer> 样本的最大堆栈深度。 默认值： 16。
  • forceGC <boolean> 在进行性能分析前强制进行垃圾回收。 默认值: false。
  • includeObjectsCollectedByMajorGC <boolean> 包含主要 GC 收集的对象。默认值： false。
  • includeObjectsCollectedByMinorGC <boolean> 包含由次级 GC 收集的对象。默认值： false。
• 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();
});import { Worker } from 'node:worker_threads';

const worker = new Worker(`
  const { parentPort } = require('node: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();
});import { Worker } from '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