title: Trained Machine Learning model is too big
body: <p>We have trained an Extra Tree model for some regression task. Our model consists of 3 extra trees, each having 200 trees of depth 30. On top of the 3 extra trees, we use a ridge regression.</p>
  <p>We trained our model for several hours and <code>pickle</code>d the trained model (the entire class object), for later use. However, the size of saved trained model is too big, about 140 GB!</p>
  <p>Is there a way to reduce the size of the saved model? Are there any configuration in <code>pickle</code> that could be helpful, or any alternative for <code>pickle</code>?</p>