iShare 技术 Web Worker_20110610_Sun

JavaScript Web Worker
by Sun
2011.6.10

假死
单线程
大数据量计算

setTimeout?
setInterval?

Web Worker
"多线程"时代

Work NOW -- 主线程
// 将要后台运行的一段代码
varworker = new Worker("worker.js");
// 如何处理后台worker返回的结果
worker.onmessage = function (event) {
console.log(event.data);
}

Work NOW -- 子线程
/**
* 得到主线程传过的消息, 启动线程进行大数据计算.
* mainThread.postMessage -> workerThread.onmessage
*/
onmessage = function (event) {
// 从event.data中取得主线程传来的数据
varmainThreadData = event.data;
// 将结果传递给主线程
// workerThread.postMessage -> mainThread.onmessage
postMessage(mainThreadData);
};

本地XHR?
子线程
worker.js
onmessage
postMessage(data)
主线程
mainThread.js
onmessage
postMessage(data)
子线程1
worker1.js
子线程2
worker2.js

NO DOM

Browser Support
Firefox 3.5(1.9.1)
Opera 10.60
Chrome 3
Safari 4
Where is Internet Explorer ?

参考
JavaScript Threading With HTML5 Web Workers

谢谢!

iShare 技术 Web Worker_20110610_Sun

by Jun Sun

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