LazyRender.babel.js

module.exports = React.createClass({
  displayName : 'LazyRender',
  
  getInitialState() { return { props : this.props } },
  componentWillReceiveProps(newProps) { setTimeout(() => this.setState(newProps), 10) },
  shouldComponentUpdate(newProps, newState) { return this.state !== newState; },
  render() { return React.cloneElement(React.Children.only(this.props.children), this.state); }
});

LazyRender.coffee

module.exports = React.createClass

  displayName: 'LazyRender'

  getInitialState: -> props: @props

  componentWillReceiveProps: (newProps) -> setTimeout (=> @setState newProps), 10

  shouldComponentUpdate: (newProps, newState) -> @state isnt newState

  render: -> React.cloneElement React.Children.only(@props.children), @state

usage

render: ->
  LazyRender
    prop1: 'thing'
    prop2: 'another thing'
    prop3: ['huge array', 'of', 'things']
  , ExpensiveComponent()