I am experiencing disturbing memory leaks in my webix app. When I profile my app I can determine that all of the leaks are contained in the webix namespace. A large part of leaks occur in the webix._events array.
For example this snippet: http://webix.com/snippet/ac30ae9a will cause the events array to grow substantially. Event worse when you capture any objects in the event handlers, that will worsen the problem exponentially.
At the moment, if you attach an event handler, webix will create a new entry in the events array. However, it is not possible to replace an event handler. I think that most of the time, replacement, is what is intended, not a duplicate handler for the same event/element. In the snippets case, refreshment of form elements cause addition of the same event handling each time.