title: react scripts start - hot reload are too slow?
body: <p>I am using <strong>create-react-app</strong> to create my react projects boilerplates but recently launching my projects with <code>npm start</code> is too slow and most recently hot reloading is slow take from 5 - 15 secs to rebuild the page after any change especially when rebuilding after an error.</p>
  <p>I really don't know much about <strong>webpack</strong>, after some search i found that problem can be from <strong>webpack</strong> or <strong>webpack-dev-server</strong> but i don't know much about them
  so i don't know from where should i move to solve this issue?</p>