Another Obscure Node.js performance tip on the topic of working with large strings... The v8 engine uses several different *types* of Strings internally. The v8 optimizer optimizes functions based, in part, on the types of objects... depending on how you& #39;re using strings...

... can and will deoptimize it& #39;s *own built in functions* that work with strings, causing those to switch to the dreaded "megamorphic" status -- yielding a significant drop in performance. You& #39;ll see this most commonly in the String.prototype functions...

... This effect can be seen most prevalently in compiler type tools like Typescript, and in React server-side rendering processes involving a lot of string manipulation. There& #39;s not much you can do about it but it is worth being aware of!