зеркало из https://github.com/mozilla/pjs.git
102 строки
2.5 KiB
HTML
102 строки
2.5 KiB
HTML
<!DOCTYPE html>
|
|
<head>
|
|
<!--
|
|
Copyright (C) 2007 Apple Inc. All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
|
|
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
-->
|
|
|
|
<title>SunSpider math-spectral-norm</title>
|
|
|
|
</head>
|
|
|
|
<body>
|
|
<h3>math-spectral-norm</h3>
|
|
<div id="console">
|
|
</div>
|
|
|
|
<script>
|
|
|
|
var _sunSpiderStartDate = new Date();
|
|
|
|
// The Great Computer Language Shootout
|
|
// http://shootout.alioth.debian.org/
|
|
//
|
|
// contributed by Ian Osgood
|
|
|
|
function A(i,j) {
|
|
return 1/((i+j)*(i+j+1)/2+i+1);
|
|
}
|
|
|
|
function Au(u,v) {
|
|
for (var i=0; i<u.length; ++i) {
|
|
var t = 0;
|
|
for (var j=0; j<u.length; ++j)
|
|
t += A(i,j) * u[j];
|
|
v[i] = t;
|
|
}
|
|
}
|
|
|
|
function Atu(u,v) {
|
|
for (var i=0; i<u.length; ++i) {
|
|
var t = 0;
|
|
for (var j=0; j<u.length; ++j)
|
|
t += A(j,i) * u[j];
|
|
v[i] = t;
|
|
}
|
|
}
|
|
|
|
function AtAu(u,v,w) {
|
|
Au(u,w);
|
|
Atu(w,v);
|
|
}
|
|
|
|
function spectralnorm(n) {
|
|
var i, u=[], v=[], w=[], vv=0, vBv=0;
|
|
for (i=0; i<n; ++i) {
|
|
u[i] = 1; v[i] = w[i] = 0;
|
|
}
|
|
for (i=0; i<10; ++i) {
|
|
AtAu(u,v,w);
|
|
AtAu(v,u,w);
|
|
}
|
|
for (i=0; i<n; ++i) {
|
|
vBv += u[i]*v[i];
|
|
vv += v[i]*v[i];
|
|
}
|
|
return Math.sqrt(vBv/vv);
|
|
}
|
|
|
|
for (var i = 6; i <= 48; i *= 2) {
|
|
spectralnorm(i);
|
|
}
|
|
|
|
|
|
var _sunSpiderInterval = new Date() - _sunSpiderStartDate;
|
|
|
|
document.getElementById("console").innerHTML = _sunSpiderInterval;
|
|
</script>
|
|
|
|
|
|
</body>
|
|
</html>
|