webworker-threads/examples/ex04_main.js

Lightweight Web Worker API implementation with native threads

/// !example
/// ## Loading the worker code from a file (main side)
/// 
/// When writing code for threads we have both code that executes in the main thread and code that 
/// executes in worker threads. When the code is small, it may be handy to have all code in a single file
/// but it is often clearer to split the code apart when the worker code starts to grow.
/// 
/// This example demonstrates how we can package the worker code in a separeate file and
/// load it with `t.load`.
/// 
/// We are going to keep the same logic as in our previous 'ping pong' example, but just repackage
/// it slightly differently.
/// 
/// In this file we keep only the ping (main) side:
// Creating the worker thread
var Threads = require('webworker-threads');
var t = Threads.create();

// Listening to 'data' events from the worker thread
t.on('data', function(n, result) {
	console.log('fibo(' + n + ') = ' + result);
	if (n < 40) t.emit('next');
	else console.log('bye!'), t.destroy();
});
/// At this point we load the worker code:
t.load(__dirname + '/ex04_worker.js');
/// And we start the game by emitting the first `next` event:
t.emit('next');
/// ### Output
/// 
/// ```
/// fibo(1) = 1
/// fibo(2) = 2
/// fibo(3) = 3
/// fibo(4) = 5
/// ...
/// fibo(39) = 102334155
/// fibo(40) = 165580141
/// bye!
/// ```