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comparison: build/pgo/js-input/access-nbody.html

build/pgo/js-input/access-nbody.html

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1 <!DOCTYPE html>
2 <head>
3 <!--
4 Copyright (C) 2007 Apple Inc. All rights reserved.
5
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions
8 are met:
9 1. Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14
15 THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
16 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
19 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 -->
27
28 <title>SunSpider access-nbody</title>
29
30 </head>
31
32 <body>
33 <h3>access-nbody</h3>
34 <div id="console">
35 </div>
36
37 <script>
38
39 var _sunSpiderStartDate = new Date();
40
41 /* The Great Computer Language Shootout
42 http://shootout.alioth.debian.org/
43 contributed by Isaac Gouy */
44
45 var PI = 3.141592653589793;
46 var SOLAR_MASS = 4 * PI * PI;
47 var DAYS_PER_YEAR = 365.24;
48
49 function Body(x,y,z,vx,vy,vz,mass){
50 this.x = x;
51 this.y = y;
52 this.z = z;
53 this.vx = vx;
54 this.vy = vy;
55 this.vz = vz;
56 this.mass = mass;
57 }
58
59 Body.prototype.offsetMomentum = function(px,py,pz) {
60 this.vx = -px / SOLAR_MASS;
61 this.vy = -py / SOLAR_MASS;
62 this.vz = -pz / SOLAR_MASS;
63 return this;
64 }
65
66 function Jupiter(){
67 return new Body(
68 4.84143144246472090e+00,
69 -1.16032004402742839e+00,
70 -1.03622044471123109e-01,
71 1.66007664274403694e-03 * DAYS_PER_YEAR,
72 7.69901118419740425e-03 * DAYS_PER_YEAR,
73 -6.90460016972063023e-05 * DAYS_PER_YEAR,
74 9.54791938424326609e-04 * SOLAR_MASS
75 );
76 }
77
78 function Saturn(){
79 return new Body(
80 8.34336671824457987e+00,
81 4.12479856412430479e+00,
82 -4.03523417114321381e-01,
83 -2.76742510726862411e-03 * DAYS_PER_YEAR,
84 4.99852801234917238e-03 * DAYS_PER_YEAR,
85 2.30417297573763929e-05 * DAYS_PER_YEAR,
86 2.85885980666130812e-04 * SOLAR_MASS
87 );
88 }
89
90 function Uranus(){
91 return new Body(
92 1.28943695621391310e+01,
93 -1.51111514016986312e+01,
94 -2.23307578892655734e-01,
95 2.96460137564761618e-03 * DAYS_PER_YEAR,
96 2.37847173959480950e-03 * DAYS_PER_YEAR,
97 -2.96589568540237556e-05 * DAYS_PER_YEAR,
98 4.36624404335156298e-05 * SOLAR_MASS
99 );
100 }
101
102 function Neptune(){
103 return new Body(
104 1.53796971148509165e+01,
105 -2.59193146099879641e+01,
106 1.79258772950371181e-01,
107 2.68067772490389322e-03 * DAYS_PER_YEAR,
108 1.62824170038242295e-03 * DAYS_PER_YEAR,
109 -9.51592254519715870e-05 * DAYS_PER_YEAR,
110 5.15138902046611451e-05 * SOLAR_MASS
111 );
112 }
113
114 function Sun(){
115 return new Body(0.0, 0.0, 0.0, 0.0, 0.0, 0.0, SOLAR_MASS);
116 }
117
118
119 function NBodySystem(bodies){
120 this.bodies = bodies;
121 var px = 0.0;
122 var py = 0.0;
123 var pz = 0.0;
124 var size = this.bodies.length;
125 for (var i=0; i<size; i++){
126 var b = this.bodies[i];
127 var m = b.mass;
128 px += b.vx * m;
129 py += b.vy * m;
130 pz += b.vz * m;
131 }
132 this.bodies[0].offsetMomentum(px,py,pz);
133 }
134
135 NBodySystem.prototype.advance = function(dt){
136 var dx, dy, dz, distance, mag;
137 var size = this.bodies.length;
138
139 for (var i=0; i<size; i++) {
140 var bodyi = this.bodies[i];
141 for (var j=i+1; j<size; j++) {
142 var bodyj = this.bodies[j];
143 dx = bodyi.x - bodyj.x;
144 dy = bodyi.y - bodyj.y;
145 dz = bodyi.z - bodyj.z;
146
147 distance = Math.sqrt(dx*dx + dy*dy + dz*dz);
148 mag = dt / (distance * distance * distance);
149
150 bodyi.vx -= dx * bodyj.mass * mag;
151 bodyi.vy -= dy * bodyj.mass * mag;
152 bodyi.vz -= dz * bodyj.mass * mag;
153
154 bodyj.vx += dx * bodyi.mass * mag;
155 bodyj.vy += dy * bodyi.mass * mag;
156 bodyj.vz += dz * bodyi.mass * mag;
157 }
158 }
159
160 for (var i=0; i<size; i++) {
161 var body = this.bodies[i];
162 body.x += dt * body.vx;
163 body.y += dt * body.vy;
164 body.z += dt * body.vz;
165 }
166 }
167
168 NBodySystem.prototype.energy = function(){
169 var dx, dy, dz, distance;
170 var e = 0.0;
171 var size = this.bodies.length;
172
173 for (var i=0; i<size; i++) {
174 var bodyi = this.bodies[i];
175
176 e += 0.5 * bodyi.mass *
177 ( bodyi.vx * bodyi.vx
178 + bodyi.vy * bodyi.vy
179 + bodyi.vz * bodyi.vz );
180
181 for (var j=i+1; j<size; j++) {
182 var bodyj = this.bodies[j];
183 dx = bodyi.x - bodyj.x;
184 dy = bodyi.y - bodyj.y;
185 dz = bodyi.z - bodyj.z;
186
187 distance = Math.sqrt(dx*dx + dy*dy + dz*dz);
188 e -= (bodyi.mass * bodyj.mass) / distance;
189 }
190 }
191 return e;
192 }
193
194 var ret;
195
196 for ( var n = 3; n <= 24; n *= 2 ) {
197 (function(){
198 var bodies = new NBodySystem( Array(
199 Sun(),Jupiter(),Saturn(),Uranus(),Neptune()
200 ));
201 var max = n * 100;
202
203 ret = bodies.energy();
204 for (var i=0; i<max; i++){
205 bodies.advance(0.01);
206 }
207 ret = bodies.energy();
208 })();
209 }
210
211
212 var _sunSpiderInterval = new Date() - _sunSpiderStartDate;
213
214 document.getElementById("console").innerHTML = _sunSpiderInterval;
215 </script>
216
217
218 </body>
219 </html>

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