Revision 9e8a2af4be1ef619f350af1c73b63922d13a94b7 authored by Michael[tm] Smith on 09 April 2014, 14:23:12 UTC, committed by Michael[tm] Smith on 09 April 2014, 14:23:12 UTC
1 parent a4b8200
prime.js
// adapted from http://html5demos.com/worker
var running = false;
onmessage = function (event) {
// doesn't matter what the message is, just toggle the worker
if (running == false) {
running = true;
run(1);
} else {
running = false;
}
};
function run(n) {
// split the task into 20k chunks
var limit = n + 20000;
search: while (running && n < limit) {
n += 1;
for (var i = 2; i <= Math.sqrt(n); i += 1) {
if (n % i == 0) {
continue search;
}
}
// found a prime!
postMessage(n);
}
if (n === limit) {
// wait for the UI thread to update itself
setTimeout(function(start_time) {
// resume prime computation at n
run(n);
}, 150);
}
}
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