computer

Asynchronous computations in R

Off-load your cpu-heavy computations from node to one or multiple independent R child processes in a fully asynchronous manner.

Setup

Install from npm:

npm install computer

In your node application:

var computer  = require('computer');
var R = new computer('C:/Program Files/R/R-3.2.0/bin/x64/R.exe');
 
R.start(function(){
  R.run('cat("1 + 2 =", 1 + 2)', function(err, log){
    console.log(log);
    R.stop();
  });
});

which wil output:

1 + 2 = 3

Hints

Connect R directly to a database to avoid costs of serializing and deserializing data. All major relational and NoSQL databases have drivers for R. In your R script, add something like:

library(rmongodb)
mongo <- mongo.create()

Utilize al your CPU cores by starting multiple R threads from your node application like so:

var binary  = 'C:/Program Files/R/R-3.2.0/bin/x64/R.exe';
var threads = require('os').cpus().length;
var R       = new computer(binary, threads);

All scripts given to R will be distributed automatically to all R instances.