Try a jsperf. I'm on the road.

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> On 21 Feb, 2014, at 3:03 pm, John-David Dalton <notifications@github.com> wrote:
> 
> In backbone.js:
> 
> > @@ -1074,25 +1083,45 @@
> >  
> >          var match = key.match(delegateEventSplitter);
> >          var eventName = match[1], selector = match[2];
> > -        method = _.bind(method, this);
> > -        eventName += '.delegateEvents' + this.cid;
> > -        if (selector === '') {
> > -          this.$el.on(eventName, method);
> > -        } else {
> > -          this.$el.on(eventName, selector, method);
> > -        }
> > +        method = method.bind && method.bind(this) || _.bind(method, this);
> Underscore _.bind defers to native so no need to do the extra work and calling _delegate.call(...) is not faster than this.delgate(...).
> 
> —
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