Napa.js

Napa.js is a multi-threaded JavaScript runtime built on V8, which was originally designed to develop highly iterative services with non-compromised performance in Bing. As it evolves, we find it useful to complement Node.js in CPU-bound tasks, with the capability of executing JavaScript in multiple V8 isolates and communicating between them. Napa.js is exposed as a Node.js module, while it can also be embedded in a host process without Node.js dependency.

Installation

Install the latest stable version:

npm install napajs

Other options can be found in Build Napa.js.

Quick Start

var napa = require('napajs');
var zone1 = napa.zone.create('zone1', { workers: 4} );

// Broadcast code to all 4 workers in 'zone1'.
zone1.broadcast('console.log("hello world");');

// Execute an anonymous function in any worker thread in 'zone1'.
zone1.execute(
    (text) => {
        return text;
    }, 
    ['hello napa'])
    .then((result) => {
        console.log(result.value);
    });

More examples:

Features

Multi-threaded JavaScript runtime
Node.js compatible module architecture with NPM support
API for object transportation, object sharing and synchronization across JavaScript threads
API for pluggable logging, metric and memory allocator
Distributed as a Node.js module, as well as supporting embed scenarios

Documentation

Contribute

You can contribute to Napa.js in following ways:

Report issues and help us verify fixes as they are checked in.
Review the source code changes.
Contribute bug fixes.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Contacts

Mailing list