Meteor performance optimizations -- inspired by https://github.com/remcoder/computron

gistfile1.txt

Tools.debouncedAutorun = function (f, timeout) {
  var debounced = _.debounce(function (c) {
    // Store current computation
    var prev = Tracker.currentComputation;

    // Set the new computation
    Tracker.currentComputation = c;//thisComputation;
    Tracker.active = !!Tracker.currentComputation;

    // Call function
    f.call(this, c);

    // Switch back
    Tracker.currentComputation = prev;
    Tracker.active = !!Tracker.currentComputation;
  }, timeout);

  return Tracker.autorun(function DebouncedComputation(c) {
    if (c.firstRun) {
      // Let the first run be run normally
      f.call(this, c);
    } else {
      // On reruns we debounce
      debounced(c);
    }
  });
};

Tools.debouncedComputron = function (f, timeout) {
  var value = new ReactiveVar();

  Tools.debouncedAutorun(function (comp) {
    value.set(f(comp));
  }, timeout);

  // only expose get()
  return function () {
    return value.get();
  };
};