diff -r 000000000000 -r 6474c204b198 js/src/parjs-benchmarks/nbody-seeded.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/parjs-benchmarks/nbody-seeded.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,554 @@
+//
+// NBody adapted from Intel's nbody benchmark.
+//
+
+load(libdir + "util.js");
+load(libdir + "seedrandom.js");
+
+var NBody = {
+  Constant: {
+    "deltaTime": 1,     // 0.005 in their code.
+    "epsSqr": 50,       // softening factor, when they compute, set to 50.
+    "initialVelocity": 8 // set to 0 to turn off
+  },
+
+  init: function init(mode, numBodies) {
+    var initPos = new Array(numBodies);
+    var initVel = new Array(numBodies);
+
+    // initialization of inputs
+    for (var i = 0; i < numBodies; i++) {
+      // [x,y,z]
+      initPos[i] = [Math.floor((Math.random()) * 40000),
+                    Math.floor((Math.random()) * 20000),
+                    Math.floor((Math.random() - .25) * 50000)];
+
+      // [x,y,z,x,y,z]
+      initVel[i] = [(Math.random() - 0.5) * NBody.Constant.initialVelocity,
+                    (Math.random() - 0.5) * NBody.Constant.initialVelocity,
+                    (Math.random()) * NBody.Constant.initialVelocity + 10,
+
+                    (Math.random() - 0.5) * NBody.Constant.initialVelocity,
+                    (Math.random() - 0.5) * NBody.Constant.initialVelocity,
+                    (Math.random()) * NBody.Constant.initialVelocity];
+    }
+
+    NBody.private = {};
+
+    if (mode === "par") {
+      NBody.private.pos = new ParallelArray(initPos);
+      NBody.private.vel = new ParallelArray(initVel);
+    } else {
+      NBody.private.pos = initPos;
+      NBody.private.vel = initVel;
+    }
+
+    NBody.numBodies = numBodies;
+    NBody.time = 0;
+  },
+
+  // Parallel
+
+  tickPar: function tickPar() {
+    NBody.private.vel = new ParallelArray([NBody.numBodies], NBody.velocityPar);
+    NBody.private.pos = new ParallelArray([NBody.numBodies], NBody.positionPar);
+    NBody.time++;
+  },
+
+  velocityPar: function velocityPar(index) {
+    var pos = NBody.private.pos;
+    var vel = NBody.private.vel;
+
+    var deltaTime = NBody.Constant.deltaTime;
+    var epsSqr = NBody.Constant.epsSqr;
+    var time = NBody.time;
+
+    var shape = vel.shape[0];
+
+    var newVel;
+    var newX, newY, newZ;
+    var newX2, newY2, newZ2;
+
+    var cX = Math.cos(time / 22) * -4200;
+    var cY = Math.sin(time / 14) * 9200;
+    var cZ = Math.sin(time / 27) * 6000;
+
+    // pull to center
+    var maxDistance = 3400;
+    var pullStrength = .042;
+
+    var speedLimit = 8;
+
+    // zones
+    var zone = 400;
+    var repel = 100;
+    var align = 300;
+    var attract = 100;
+
+    if (time < 500) {
+      speedLimit = 2000;
+      var attractPower = 100.9;
+    } else {
+      speedLimit = .2;
+      attractPower = 20.9;
+    }
+
+    var zoneSqrd = zone * zone + zone * zone + zone * zone;
+
+    var accX = 0, accY = 0, accZ = 0;
+    var accX2 = 0, accY2 = 0, accZ2 = 0;
+    var i;
+
+    // define particle 1 center distance
+    var dirToCenterX = cX - pos.get(index)[0];
+    var dirToCenterY = cY - pos.get(index)[1];
+    var dirToCenterZ = cZ - pos.get(index)[2];
+
+    var distanceSquaredTo = dirToCenterX * dirToCenterX + dirToCenterY * dirToCenterY + dirToCenterZ * dirToCenterZ;
+    var distToCenter = Math.sqrt(distanceSquaredTo);
+
+    // orient to center
+    if (distToCenter > maxDistance) {
+      var velc = (distToCenter - maxDistance) * pullStrength;
+      if (time < 200)
+        velc = .2;
+      else velc = (distToCenter - maxDistance) * pullStrength;
+
+      accX += (dirToCenterX / distToCenter) * velc;
+      accY += (dirToCenterY / distToCenter) * velc;
+      accZ += (dirToCenterZ / distToCenter) * velc;
+    }
+
+    for (i = 0; i < shape; i = i + 1) {
+      var rx = pos.get(i)[0] - pos.get(index)[0];
+      var ry = pos.get(i)[1] - pos.get(index)[1];
+      var rz = pos.get(i)[2] - pos.get(index)[2];
+
+      // make sure we are not testing the particle against its own position
+      var areSame = 0;
+      if (pos.get(i)[0] == pos.get(index)[0] && pos.get(i)[1] == pos.get(index)[1] && pos.get(i)[2] == pos.get(index)[2])
+        areSame += 1;
+
+      var distSqrd = rx * rx + ry * ry + rz * rz;
+
+      // cant use eqals to test, only <= or >= WTF
+      if (distSqrd < zoneSqrd && areSame <= 0) {
+        var length = Math.sqrt(distSqrd);
+        var percent = distSqrd / zoneSqrd;
+
+        if (distSqrd < repel) {
+          var F = (repel / percent - 1) * .025;
+
+          var normalRx = (rx / length) * F;
+          var normalRy = (ry / length) * F;
+          var normalRz = (rz / length) * F;
+
+          accX = accX + normalRx;
+          accY = accY + normalRy;
+          accZ = accZ + normalRz;
+
+          accX2 = accX2 - normalRx;
+          accY2 = accY2 - normalRy;
+          accZ2 = accZ2 - normalRz;
+        } else if (distSqrd < align) { //align
+          var threshDelta = align - repel;
+          var adjustedPercent = (percent - repel) / threshDelta;
+          var Q = (.5 - Math.cos(adjustedPercent * 3.14159265 * 2) * .5 + .5) * 100.9;
+
+          // get velocity 2
+          var velX2 = vel.get(i)[4];
+          var velY2 = vel.get(i)[5];
+          var velZ2 = vel.get(i)[6];
+
+          var velLength2 = Math.sqrt(velX2 * velX2 + velY2 * velY2 + velZ2 * velZ2);
+
+          // normalize vel2 and multiply by factor
+          velX2 = (velX2 / velLength2) * Q;
+          velY2 = (velY2 / velLength2) * Q;
+          velZ2 = (velZ2 / velLength2) * Q;
+
+          // get own velocity
+          var velX = vel.get(i)[0];
+          var velY = vel.get(i)[1];
+          var velZ = vel.get(i)[2];
+
+          var velLength = Math.sqrt(velX * velX + velY * velY + velZ * velZ);
+
+          // normalize own velocity
+          velX = (velX / velLength) * Q;
+          velY = (velY / velLength) * Q;
+          velZ = (velZ / velLength) * Q;
+
+          accX += velX2;
+          accY += velY2;
+          accZ += velZ2;
+
+          accX2 += velX;
+          accY2 += velY;
+          accZ2 += velZ;
+        }
+
+        if (distSqrd > attract) { // attract
+          var threshDelta2 = 1 - attract;
+          var adjustedPercent2 = (percent - attract) / threshDelta2;
+          var C = (1 - (Math.cos(adjustedPercent2 * 3.14159265 * 2) * 0.5 + 0.5)) * attractPower;
+
+          // normalize the distance vector
+          var dx = (rx / (length)) * C;
+          var dy = (ry / (length)) * C;
+          var dz = (rz / (length)) * C;
+
+          accX += dx;
+          accY += dy;
+          accZ += dz;
+
+          accX2 -= dx;
+          accY2 -= dy;
+          accZ2 -= dz;
+        }
+      }
+    }
+
+    // Speed limits
+    if (time > 500) {
+      var accSquared = accX * accX + accY * accY + accZ * accZ;
+      if (accSquared > speedLimit) {
+        accX = accX * .015;
+        accY = accY * .015;
+        accZ = accZ * .015;
+      }
+
+      var accSquared2 = accX2 * accX2 + accY2 * accY2 + accZ2 * accZ2;
+      if (accSquared2 > speedLimit) {
+        accX2 = accX2 * .015;
+        accY2 = accY2 * .015;
+        accZ2 = accZ2 * .015;
+      }
+    }
+
+    // Caclulate new velocity
+    newX = (vel.get(index)[0]) + accX;
+    newY = (vel.get(index)[1]) + accY;
+    newZ = (vel.get(index)[2]) + accZ;
+
+    newX2 = (vel.get(index)[3]) + accX2;
+    newY2 = (vel.get(index)[4]) + accY2;
+    newZ2 = (vel.get(index)[5]) + accZ2;
+
+    if (time < 500) {
+      var acs = newX2 * newX2 + newY2 * newY2 + newZ2 * newZ2;
+      if (acs > speedLimit) {
+        newX2 = newX2 * .15;
+        newY2 = newY2 * .15;
+        newZ2 = newZ2 * .15;
+      }
+
+      var acs2 = newX * newX + newY * newY + newZ * newZ;
+      if (acs2 > speedLimit) {
+        newX = newX * .15;
+        newY = newY * .15;
+        newZ = newZ * .15;
+      }
+    }
+
+    return [newX, newY, newZ, newX2, newY2, newZ2];
+  },
+
+  positionPar: function positionPar(index) {
+    var vel = NBody.private.vel;
+    var pos = NBody.private.pos;
+
+    var x = 0;
+    var y = 0;
+    var z = 0;
+
+    var velX = vel.get(index)[0];
+    var velY = vel.get(index)[1];
+    var velZ = vel.get(index)[2];
+
+    var velX2 = vel.get(index)[3];
+    var velY2 = vel.get(index)[4];
+    var velZ2 = vel.get(index)[5];
+
+    var netVelX = (velX - velX2);
+    var netVelY = (velY - velY2);
+    var netVelZ = (velZ - velZ2);
+
+    x = pos.get(index)[0] + (netVelX);
+    y = pos.get(index)[1] + (netVelY);
+    z = pos.get(index)[2] + (netVelZ);
+
+    return [x, y, z];
+  },
+
+  // Sequential
+
+  tickSeq: function tickSeq() {
+    var numBodies = NBody.numBodies;
+    var newVel = new Array(numBodies);
+    var newPos = new Array(numBodies);
+
+    for (var i = 0; i < numBodies; i++)
+      newVel[i] = NBody.velocitySeq(i);
+
+    for (var i = 0; i < numBodies; i++)
+      newPos[i] = NBody.positionSeq(i);
+
+    NBody.private.vel = newVel;
+    NBody.private.pos = newPos;
+
+    NBody.time++;
+  },
+
+  velocitySeq: function velocitySeq(index) {
+    var vel = NBody.private.vel;
+    var pos = NBody.private.pos;
+
+    var deltaTime = NBody.Constant.deltaTime;
+    var epsSqr = NBody.Constant.epsSqr;
+    var time = NBody.time;
+
+    var shape = pos.length;
+
+    var newVel;
+    var newX, newY, newZ;
+    var newX2, newY2, newZ2;
+
+    var cX = Math.cos(time / 22) * -4200;
+    var cY = Math.sin(time / 14) * 9200;
+    var cZ = Math.sin(time / 27) * 6000;
+
+    // pull to center
+    var maxDistance = 3400;
+    var pullStrength = .042;
+
+    var speedLimit = 8;
+
+    // zones
+    var zone = 400;
+    var repel = 100;
+    var align = 300;
+    var attract = 100;
+
+
+    if (time < 500) {
+      speedLimit = 2000;
+      var attractPower = 100.9;
+    } else {
+      speedLimit = .2;
+      attractPower = 20.9;
+    }
+
+    var zoneSqrd = zone * zone + zone * zone + zone * zone;
+
+    var accX = 0, accY = 0, accZ = 0;
+    var accX2 = 0, accY2 = 0, accZ2 = 0;
+    var i;
+
+    // define particle 1 center distance
+    var dirToCenterX = cX - pos[index][0];
+    var dirToCenterY = cY - pos[index][1];
+    var dirToCenterZ = cZ - pos[index][2];
+
+    var distanceSquaredTo = dirToCenterX * dirToCenterX + dirToCenterY * dirToCenterY + dirToCenterZ * dirToCenterZ;
+    var distToCenter = Math.sqrt(distanceSquaredTo);
+
+    // orient to center
+    if (distToCenter > maxDistance) {
+      var velc = (distToCenter - maxDistance) * pullStrength;
+      if (time < 200)
+        velc = .2;
+      else velc = (distToCenter - maxDistance) * pullStrength;
+
+      accX += (dirToCenterX / distToCenter) * velc;
+      accY += (dirToCenterY / distToCenter) * velc;
+      accZ += (dirToCenterZ / distToCenter) * velc;
+    }
+
+    for (i = 0; i < shape; i = i + 1) {
+      var rx = pos[i][0] - pos[index][0];
+      var ry = pos[i][1] - pos[index][1];
+      var rz = pos[i][2] - pos[index][2];
+
+      var areSame = 0;
+      if (pos[i][0] == pos[index][0] && pos[i][1] == pos[index][1] && pos[i][2] == pos[index][2])
+        areSame += 1;
+
+      var distSqrd = rx * rx + ry * ry + rz * rz;
+
+      // cant use eqals to test, only <= or >= WTF
+      if (distSqrd < zoneSqrd && areSame <= 0) {
+        var length = Math.sqrt(distSqrd);
+        var percent = distSqrd / zoneSqrd;
+
+
+        if (distSqrd < repel) {
+          var F = (repel / percent - 1) * .025;
+
+          var normalRx = (rx / length) * F;
+          var normalRy = (ry / length) * F;
+          var normalRz = (rz / length) * F;
+
+          accX = accX + normalRx;
+          accY = accY + normalRy;
+          accZ = accZ + normalRz;
+
+          accX2 = accX2 - normalRx;
+          accY2 = accY2 - normalRy;
+          accZ2 = accZ2 - normalRz;
+        } else if (distSqrd < align) { //align
+          var threshDelta = align - repel;
+          var adjustedPercent = (percent - repel) / threshDelta;
+          var Q = (.5 - Math.cos(adjustedPercent * 3.14159265 * 2) * .5 + .5) * 100;
+
+          // get velocity 2
+          var velX2 = vel[i][3];
+          var velY2 = vel[i][4];
+          var velZ2 = vel[i][5];
+
+          var velLength2 = Math.sqrt(velX2 * velX2 + velY2 * velY2 + velZ2 * velZ2);
+
+          // normalize vel2 and multiply by factor
+          velX2 = (velX2 / velLength2) * Q;
+          velY2 = (velY2 / velLength2) * Q;
+          velZ2 = (velZ2 / velLength2) * Q;
+
+          // get own velocity
+          var velX = vel[i][0];
+          var velY = vel[i][1];
+          var velZ = vel[i][2];
+
+          var velLength = Math.sqrt(velX * velX + velY * velY + velZ * velZ);
+
+          // normalize own velocity
+          velX = (velX / velLength) * Q;
+          velY = (velY / velLength) * Q;
+          velZ = (velZ / velLength) * Q;
+
+          accX += velX2;
+          accY += velY2;
+          accZ += velZ2;
+
+          accX2 += velX;
+          accY2 += velY;
+          accZ2 += velZ;
+        }
+
+        if (distSqrd > attract) {        //attract
+          var threshDelta2 = 1 - align;
+          var adjustedPercent2 = (percent - align) / threshDelta2;
+          var C = (1 - (Math.cos(adjustedPercent2 * 3.14159265 * 2) * 0.5 + 0.5)) * attractPower;
+
+          // normalize the distance vector
+          var dx = (rx / (length)) * C;
+          var dy = (ry / (length)) * C;
+          var dz = (rz / (length)) * C;
+
+          debug = 1.1;
+
+          accX += dx;
+          accY += dy;
+          accZ += dz;
+
+          accX2 -= dx;
+          accY2 -= dy;
+          accZ2 -= dz;
+        }
+      }
+    }
+
+    // enforce speed limits
+    if (time > 500) {
+      var accSquared = accX * accX + accY * accY + accZ * accZ;
+      if (accSquared > speedLimit) {
+        accX = accX * .015;
+        accY = accY * .015;
+        accZ = accZ * .015;
+      }
+
+      var accSquared2 = accX2 * accX2 + accY2 * accY2 + accZ2 * accZ2;
+      if (accSquared2 > speedLimit) {
+        accX2 = accX2 * .015;
+        accY2 = accY2 * .015;
+        accZ2 = accZ2 * .015;
+      }
+    }
+
+    // Caclulate new velocity
+    newX = vel[index][0] + accX;
+    newY = vel[index][1] + accY;
+    newZ = vel[index][2] + accZ;
+
+    newX2 = vel[index][3] + accX2;
+    newY2 = vel[index][4] + accY2;
+    newZ2 = vel[index][5] + accZ2;
+
+    if (time < 500) {
+      var acs = newX2 * newX2 + newY2 * newY2 + newZ2 * newZ2;
+      if (acs > speedLimit) {
+        newX2 = newX2 * .15;
+        newY2 = newY2 * .15;
+        newZ2 = newZ2 * .15;
+      }
+
+      var acs2 = newX * newX + newY * newY + newZ * newZ;
+      if (acs2 > speedLimit) {
+        newX = newX * .15;
+        newY = newY * .15;
+        newZ = newZ * .15;
+      }
+    }
+
+    return [newX, newY, newZ, newX2, newY2, newZ2];
+  },
+
+  positionSeq: function positionSeq(index) {
+    var vel = NBody.private.vel;
+    var pos = NBody.private.pos;
+
+    var x = 0;
+    var y = 0;
+    var z = 0;
+
+    var velX = vel[index][0];
+    var velY = vel[index][1];
+    var velZ = vel[index][2];
+
+    var velX2 = vel[index][3];
+    var velY2 = vel[index][4];
+    var velZ2 = vel[index][5];
+
+    var netX = (velX - velX2);
+    var netY = (velY - velY2);
+    var netZ = (velZ - velZ2);
+
+    x = pos[index][0] + netX;
+    y = pos[index][1] + netY;
+    z = pos[index][2] + netZ;
+
+    return [x, y, z];
+  }
+};
+
+function emulateNBody(mode, numBodies, ticks) {
+  NBody.init(mode, numBodies);
+  for (var i = 0; i < ticks; i++) {
+    var start = Date.now();
+    if (mode === "par")
+      NBody.tickPar();
+    else
+      NBody.tickSeq();
+    //print(NBody.private.pos);
+    print(mode + " bodies=" + numBodies + " tick=" + (i+1) + "/" + ticks + ": " + (Date.now() - start) + " ms");
+  }
+}
+
+// Using 4000 bodies going off Rick's comment as 4000 being a typical workload.
+const NUMBODIES = 4000;
+const TICKS = 10;
+
+Math.seedrandom("seed");
+
+benchmark("NBODY", 1, DEFAULT_MEASURE,
+          function () { emulateNBody("seq", NUMBODIES, TICKS); },
+          function () { emulateNBody("par", NUMBODIES, TICKS); });