title: Serial console enabled Performance is impacted. To disable, check bootloader
body: <p>I recently created an Android emulator with Android version R.
  It showing an Android system notification </p>
  
  <p><strong>"Serial console enabled  Performance is impacted. To disable, check bootloader"</strong></p>
  
  <p>Can someone explain, what this notification means?</p>
  
  <p><a href="https://i.stack.imgur.com/or1pC.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/or1pC.jpg" alt="enter image description here"></a>,</p>