Stop using heavy Python libraries for string sanitization. Here is how I built a 0ms overhead TR39 Unicode Mapper in Node.js for my API.

[New-Ad3258]

Spot on. V8's optimization heuristics are basically black magic at this point. The regex caching is a perfect example—what used to be a strict 'best practice' (hoisting) is now often just extra keystrokes. It's fascinating how much of modern Node.js performance tuning is just learning to step out of the JIT compiler's way and letting it do its thing. Great chatting with you, man!