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child-process-function

v1.0.3

Published

This is a node library for running functions in parallel. Unlike other commonly used libraries that claim parallelism, but are actually confined to the concurrency pattern of promises and javascript's event-loop, child-process-function uses node's built-i

Downloads

7

Readme

child-process-function travis

This is a node library for running functions in parallel. Unlike other commonly used libraries that claim parallelism, but are actually confined to the concurrency pattern of promises and javascript's event-loop, child-process-function uses node's built-in child_process library to create actual parallelism for blazing fast execution.

Installation

npm install child-process-function

Basic Usage

Why wait for the call stack to empty, when you can kick off a true child process that executes your function in parallel. It would be the same as if you had a separate file and used node's child_process.spawn.

const spawn = require('child-process-function')

function takesALongTime(){
  ...
  console.log('this should log after')
}

function(){
  spawn({callback: takesALongTime})
  console.log('this should log first')
}

Options

const opts = {
    callback: (foo, bar) => {
        console.log("happening inside child process")
    },
    callbackArgs: ["foo", "bar"], //optional
    onSuccess: () => console.log("this happens when my child function ends"), //optional,
    onMessage: (msg) =>
        console.log(
            msg,
            "this happens when my child function calls process.send('...')"
        ), //optional
    onError: () =>
        console.log("this happens if there is an error in my child function"), //optional,
    timeout: 3000, //optional, defaults to 3000
}

spawn(opts)

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT