Beautiful code = Slow code :(

gistfile1.js

GeomUtils.center3 = function(points) {
  var sum = new Vec3(0, 0, 0);
  for(var i=0; i<points.length; i++) {
    sum.add(points[i]);
  }
  sum.scale(1/points.length);
  return sum;
}

GeomUtils.center3R = function(points) {
  var center = points.reduce(function(center, p) {
    return center.add(p);
  }, new Vec3(0, 0, 0)).scale(1/points.length);
}

GeomUtils.average = function(list) {
  var sum = 0;
  for(var i=0; i<list.length; i++) {
    sum += list[i];
  }
  return sum / list.length;
}

var R = require('ramda');

GeomUtils.center3SR = function(points) {
  var x = GeomUtils.average(points.map(R.prop('x')));
  var y = GeomUtils.average(points.map(R.prop('y')))
  var z = GeomUtils.average(points.map(R.prop('z')))
  return new Vec3(x, y, z);
}

//Results for 1000'000 points
//center3: 7ms
//center3R: 45ms
//center3SR: 1594ms

At the same time in usual scenario for 10'000 points

center3: 0ms
center3R: 1ms
center3SR: 3ms