title: Async influence on other applications on the same host (IIS)
body: <p>Assume I have 2 application hosted on <code>IIS</code> within the same machine.</p>
  <p><code>Application A</code> - very busy, has to serve lots of requests.</p>
  <p><code>Application B</code> - not busy at all, has to serve only few <strong>but heavy</strong> <code>IO</code> requests.</p>
  <p>My question: If response time of <code>Application B</code> does not matter, does use of <code>async</code> in <code>Application B</code> save time for <code>Application A</code>?</p>
  <p>I think, it may save time because when <code>Application B</code> will operate <code>IO</code> bound operation, if there is an <code>async</code> way <code>CPU</code> will not be suspended and waiting for the <code>IO</code> signal.</p>
  <p>So, <code>Application A</code> would benefit from it. But I'm not sure if I'm right about it. Or, the impact is only on other threads within the same application (i.e. <code>Application B</code>).</p>
  <p>Can someone clarify this?</p>