зеркало из https://github.com/mozilla/gecko-dev.git
66 строки
1.5 KiB
HTML
66 строки
1.5 KiB
HTML
<html>
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<body>
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<script>
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function Matrix(ary) {
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this.mtx = ary
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this.height = ary.length;
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this.width = ary[0].length;
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}
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Matrix.prototype.toString = function() {
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var s = []
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for (var i = 0; i < this.mtx.length; i++)
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s.push( this.mtx[i].join(",") );
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return s.join("\n");
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}
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Matrix.prototype.mult = function(other) {
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if (this.width != other.height) {
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throw "error: incompatible sizes";
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}
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var result = [];
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for (var i = 0; i < this.height; i++) {
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result[i] = [];
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for (var j = 0; j < other.width; j++) {
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var sum = 0;
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for (var k = 0; k < this.width; k++) {
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sum += this.mtx[i][k] * other.mtx[k][j];
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}
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result[i][j] = sum;
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}
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}
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return new Matrix(result);
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}
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function run() {
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var now = new Date();
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var div = document.getElementsByTagName('div')[0];
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var elems = [];
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for (var i = 0; i < 600; i++) {
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elems.push(i);
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}
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var outer = [];
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for (var i = 0; i < 600; i++) {
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outer.push(elems);
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}
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var a = new Matrix(outer);
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var b = new Matrix(outer);
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var result = a.mult(b);
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var time = (new Date()) - now;
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var text = document.createTextNode(time.toString() + 'ms');
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var para = document.createElement('p');
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para.appendChild(text);
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div.appendChild(para);
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}
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setTimeout(function forever() {
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run();
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setTimeout(forever, 1000);
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}, 0);
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</script>
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<p>Time required to multiply two 600x600 matrices:</p>
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<div></div>
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</body>
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</html>
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