title: Two way to batch insert and the performance is same or not?
body: <p>About performance of batch insert.<br/>
  1.</p>
  
  <pre><code>insert goods(...) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  
  insert goods(...) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  ...
  </code></pre>
  
  <p>2.</p>
  
  <pre><code>insert goods(...) values(...)
  insert goods(...) values(...)
  ...
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  insert goods_price(goods_id, level, price) values(...)
  </code></pre>
  
  <p>About performance above two way is same or not same? Which way is more friendly to mysql?</p>