Timing backbone fetch

backbone_fetch_monkeypatch.js.coffee

root = exports ? this

# Overloading backbone fetch method
previousFetch = Backbone.Collection.prototype.fetch
root.Backbone.Collection.prototype.fetch = (options={})->
  asyncUniqId = _.uniqueId 'time_'+@constructor.name+'_'
  console.time asyncUniqId
  previousSuccess = if options? then options.success else undefined
  options = _.extend(options,
                success: =>
                  previousSuccess.apply @, arguments if previousSuccess?
                  console.timeEnd asyncUniqId
              )
  previousFetch.apply @, [options]