title: What's the reason that don't use staging buffer?
body: <p>Recently I was wondering for a game, if there are many models and each one of them needs vertex buffer to draw. Like below three options, which one is most efficient?</p>
  
  <ol>
  <li>Create several small vertex buffers and update it with vkMapMemory before draw those models.</li>
  <li>Create several small vertex buffers and use staging buffer to update.</li>
  <li>Create several big enough vertex buffers and use it.</li>
  </ol>