Render-Blocking Script Bug
Spot why this head script blocks rendering and slows the page.
Codehtml
<!DOCTYPE html>
<html>
<head>
<title>Product Page</title>
<!-- 250KB analytics + app bundle -->
<script src="/js/app.bundle.js"></script>
</head>
<body>
<h1>Welcome</h1>
<p>Big content here...</p>
</body>
</html>What is the performance bug in this HTML?