title: Vue application has too slow routing
body: <p>I have a Vue application on frontend and php Yii2 on backend.
  Each route from Vue to Yii2 has approximately time from 3 to 5 seconds.
  I found one solution on stackoverflow
  <a href="https://stackoverflow.com/questions/18055742/very-slow-ajax-response-on-yii-framework">Very slow ajax response on yii framework</a>
  but it hadn't helped me.
  On frontend in my vue.config.js I have proxy settings:</p>
  
  <pre><code>devServer: {
      proxy: {
        "/api": {
          target: "http://localhost"
        }
      },
  </code></pre>
  
  <p>Maybe, I have problems from the proxy?</p>