title: Why would I use Math.imul()?
body: <p>Does it perform better than * expressions?  Why?</p>
  
  <p><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul" rel="noreferrer">This article</a> describes it as being useful for projects like Emscripten.  Why is that?</p>
  
  <p>Thanks</p>