Add sleep(), usleep() to Node.js, via a C/C++ addons with N-API. implementation true event-loop blocking sleep.
npm install easy-sleep -S
implementation based on Promise + setTimeout combination.
const { sleep } = require('easy-sleep');
async function test() {
console.log(1);
await sleep(3000); // 3000 ms delay
console.log(2); // Output 2 after about 3000 milliseconds
}true event-loop blocking sleep. use caution in the main thread.
- Thread.sleep(n): sleep for n milliseconds
- Thread.usleep(n): sleep for n microseconds (1 second is 1000000 microseconds)
- Thread.wait(n): implementation based on Atomics.wait (Support Node.js v8.10.0+)
const { Thread } = require('easy-sleep');
Thread.sleep();You can use in worker thread.
// app.js
const { Worker } = require('worker_threads');
const list = ['A', 'B', 'C', 'D'];
for (const item of list) {
const worker = new Worker('./worker.js');
worker.on('message', msg => {
console.log(`main thread callback message: ${msg}`);
worker.terminate()
});
worker.postMessage(item);
}// worker.js
const { parentPort, threadId } = require('worker_threads');
const { Thread } = require('easy-sleep');
parentPort.on('message', async data => {
console.log(`worker thread(${threadId}) receive message: ${JSON.stringify(data)}`);
Thread.sleep(3000 + threadId * 1000);
parentPort.postMessage(`worker(${threadId})`);
});