title: How assets precompile in development environment on ruby on rails?
body: <p>Why can't we precompile assets in a development environment? I know that sprockets basically compile all  assets.</p>
  
  <p>When we go in production environment then we run the command:</p>
  
  <pre><code>rake assets:precompile
  </code></pre>
  
  <p>But in the development env we can't do anything for it to compile itself.
  What are difference in behavior of assets compilation in both environment?</p>