I&#x27;m coming up on a year of knowing JS and none of the recommended beginner resources or books ever mention performance or profiling. It seems to just not be taught. On &#x2F;r&#x2F;javascript and other forums I do not see it mentioned often as it&#x27;s assumed the library or framework takes care of it.<p>I&#x27;ll take the opportunity now and ask for good resources on JS performance, garbage collection, and profiling. I realize I know the syntax and semantics well (and a framework or two), but not enough about optimization and related stuff (like ServiceWorker).