quick render bench for backbone (and coffeescript)

gistfile1.coffee

    old_render = @render
    @render = =>
      t0 = new Date()
      ret = old_render()
      t1 = new Date()
      t = t1 - t0
      
      window.benches or= {}
      window.benches.rows or= []
      window.benches.rows.push t
      ret