     scrollFast: React.PropTypes.bool
     onExerciseToggle: React.PropTypes.func.isRequired
 
-  mixins: [ScrollTo]
+  mixins: [ScrollTo, addons.PureRenderMixin]
 
   componentDidMount:   ->
     @scrollToSelector('.exercise-sections', {immediate: @props.scrollFast})

React = require 'react'
BS = require 'react-bootstrap'

{TocStore} = require '../../flux/toc'
{ExerciseActions, ExerciseStore} = require '../../flux/exercise'

Icon = require '../icon'

SectionsExercises = React.createClass

  mixins: [addons.PureRenderMixin]

  propTypes:
    exercises:   React.PropTypes.array.isRequired
