title: Is there any cache option in Sweave [R]?
body: <p>Why <code>Sweave</code> is so poor?
  Is there any cache option for chunk that enables caching as it is solved in <code>knitr</code> package. There is chunk option <code>cache=TRUE</code> but in <code>Sweave</code> it looks like there is not such solution. 
  Maybe someone heard or seen options in <code>Sweave</code> that enables caching?
  Thanks for help.</p>