title: Memory efficient alternative to rbind - in-place rbind?
body: <p>I need to rbind two large data frames. Right now I use</p>
  
  <pre><code>df &lt;- rbind(df, df.extension)
  </code></pre>
  
  <p>but I (almost) instantly run out of memory. I guess its because df is held in the memory twice. I might see even bigger data frames in the future, so I need some kind of in-place rbind. </p>
  
  <p>So my question is: Is there a way to avoid data duplication in memory when using rbind?</p>
  
  <p>I found this <a href="https://stackoverflow.com/questions/4761073/r-how-to-rbind-two-huge-data-frames-without-running-out-of-memory">question</a>, which uses SqlLite, but I really want to avoid using the hard drive as a cache.</p>