Two thoughts that come to mind when thinking about Pub/Sub libs: a) jQuery has custom events out-of-the-box and code that uses them looks pretty idiomatic (as

Two thoughts that come to mind when thinking about Pub/Sub libs: a) jQuery has custom events out-of-the-box and code that uses them looks pretty idiomatic (as far as jQuery goes anyways) b) I find that when it comes to fancy complex UIs, the events aren't usually the bottleneck, so I'm not sure why performance optimization for them should be a primary design concern (i.e. to the point of considering including/maintaining one more library).