A tiny wrapper for turning Node.js threads in easy-to-use routines for CPU-bound.
When my multithreaded program works like a charm - thecodinglove
Microjob is a tiny wrapper for Node.js threads and is intended to perform heavy CPU loads using anonymous functions. So, Microjob treats Node.js threads as temporary working units: if you need to spawn a long-living thread, then you should use the default API.
Microjob follows the same line of the original Node.js documentation: use it only for CPU-bound jobs and not for I/O-bound purposes. Quoting the documentation:
Workers are useful for performing CPU-intensive JavaScript operations; do not use them for I/O, since Node.js’s built-in mechanisms for performing operations asynchronously already treat it more efficiently than Worker threads can.
Microjob can be used only with Node.js 10.5+ and with the --experimental-worker flag activated, otherwise it won't work.
More details explained in: Microjob: a tiny multithreading library for Node.js
Via npm:
$ npm install --save microjob(async () => {
const { job, stop } = require('microjob')
try {
// this function will be executed in another thread
const res = await job(() => {
let i = 0
for (i = 0; i < 1000000; i++) {
// heavy CPU load ...
}
return i
})
console.log(res) // 1000000
} catch (err) {
console.error(err)
}
// graceful shutdown
stop()
})()Dive deep into the documentation to find more examples: Guide