title: Memory usage when unzipping files with rubyzip
body: <p>I'm using rubyzip to unzip some files during a rake task, but Im finding that the memory used isn't available after unzipping the files. I have to reboot the server to reclaim the memory. Anyone else having similar issues? Any workarounds?</p>
  
  <p>I'm unzipping with the same code as the example on github</p>
  
  <p><a href="https://github.com/rubyzip/rubyzip" rel="nofollow">https://github.com/rubyzip/rubyzip</a></p>
  
  <pre><code>Zip::File.open('foo.zip') do |zip_file|
    # Handle entries one by one
    zip_file.each do |entry|
      # Extract to file/directory/symlink
      puts "Extracting #{entry.name}"
      entry.extract(dest_file)
  
    end
  end
  </code></pre>
  
  <p>Any suggestions would be greatly appreciated!</p>