title: Docker Desktop 2.2+ incredibly slow performance with host volume mounts
body: <p>I've got a build which is quite intensive in terms of file io.  It involves 70k loose files as well as a fair amount of zipping/unzipping.</p>
  
  <p>The performance of this build plummets when run inside of a Docker Desktop 2.2+ container using host volume mounts.</p>
  
  <p>12 minutes - Straight Windows 10</p>
  
  <p>19 minutes - Docker Desktop 2.1.0.5 against <strong>host mounted volume</strong> (Windows /c drive)</p>
  
  <p>71 minutes - Docker Desktop 2.3.0.2 against <strong>host mounted volume</strong> (Windows /c drive)</p>
  
  <p>2 minutes - Docker Desktop 2.1.0.5 against container file system</p>
  
  <p>2 minutes - Docker Desktop 2.3.0.2 against container file system</p>
  
  <p>Even with Docker 2.1.0.5 against host volume mount the performance wasn't great.  But with DD 2.3 going from ~19 minutes to ~71 minutes is mind numbing.</p>
  
  <p>Anyone else seeing this kind of performance hit on file io intensive tasks?</p>