PubSubJS vs. jQuery custom events

JavaScript performance comparison

Test case created by Morgan Roderick

Info

An attempt at showing that PubSubJS is faster than using jQuery custom evens for publish/subscribe style messaging.

It's certainly not as rich in features, and I am happy with that.

Introducing PubSubJS

Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="//github.com/mroderick/PubSubJS/raw/master/pubsub.min.js"></script>
<script>
  var callback1 = function() {};
  var callback2 = function() {};
  var payload = {
   somekey: 'some value'
  };
  var body;
 
  // let's use jQuery.ready to make sure that the DOM is ready,
  // before trying to work with it
  jQuery(function() {
   // we'll use the body element to exchange messages for jQuery
   // if using deeper nested elements, jQuery will be slower, as custom events bubble
   body = $('body');
 
   // subscribe our callback1 function to the custom event for jQuery, only once
   body.bind('my-event', callback1);
 
   // subscribe our callback2 function to the message for PubSub
   PubSub.subscribe('my-event', callback2)
  });
</script>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
jQuery - trigger
body.trigger('my-event', payload);
pending…
PubSub - publish - asyncronous
PubSub.publish('my-event', payload);
pending…
PubSub - publish - syncronous
PubSub.publish('my-event', payload, true);
pending…

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1 comment

claus commented :

I get an error when running the test -> ReferenceError: PubSub is not defined.

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