threads.js

thread.js

What is thread.js

threads is a lightweight thread api with es6 syntax.
and when you with the latest Chrome/Firefox/Edge, it use WebWorker to free boost your application with extra processor.
(safari do not support let/const syntax yet so it throw errors, but you can rewrite it to use var syntax--just a little work, if you want.)

How to use it

you could not to be confusion.
there is only one api: Thread.spawn
Thread.spawn receives only one parameter, an object like

{
    data: data,
    move: [tansferable],
    fn: function (data) {},
}

and returns a Promise object.

Notice

which fn you give will be run in an Standalone environment, so you can not refer to your main context inside the fn.

with chrome/firefox

<script src="lib/Thread.js"></script>

Thread.spawn({
    data: data,
    fn: function(data) {
         "use strict";
         let result = data;
        return result;
    }
}).then(function(result) {
    console.log(result);
});

with nodejs

var Thread = require("threads.js").Thread;
 
Thread.spawn({
    data: data,
    fn: function(data) {
        "use strict";
        let result = data;
   		return result;
    }
}).then(function(result) {
    console.log(result);
});

run example from node

$ node --harmony_destructuring example.js

get it faster with browser

use move option to transfer big data without copy-cost.
Transferable

"use strict";
let count = 10;
let startTime = Date.now();
for(let i = 0; i < count; i++) {
    let data = new Uint8Array(10*1024*1024);
    Thread.spawn({
        data: data,
        move: [data.buffer],
        fn: function(data, move) {
            "use strict";
            for(let i in data) {
                //do something
            }
            move(data.buffer);
            let result = data;
     	  	return result;
        }
    }).then(function(result) {
        console.log((Date.now() - startTime) + " ms");
    }).catch(error => {
    	console.log(error);
    });
}

What is next?

I will replace prototype to Class when Chrome/Firefox/Safari/Edge is ready.
and other es6(or es7?) syntax when at least 2 browser support it.

Issue

Anything will be receive, please tell me.

License

Licensed under the MIT License.